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2016-05-23kdump: fix gdb macros work work with newer and 64-bit kernelsCorey Minyard
Lots of little changes needed to be made to clean these up, remove the four byte pointer assumption and traverse the pid queue properly. Also consolidate the traceback code into a single function instead of having three copies of it. Link: http://lkml.kernel.org/r/1462926655-9390-1-git-send-email-minyard@acm.org Signed-off-by: Corey Minyard <cminyard@mvista.com> Acked-by: Baoquan He <bhe@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Haren Myneni <hbabu@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23s390/kexec: consolidate crash_map/unmap_reserved_pages() and ↵Xunlei Pang
arch_kexec_protect(unprotect)_crashkres() Commit 3f625002581b ("kexec: introduce a protection mechanism for the crashkernel reserved memory") is a similar mechanism for protecting the crash kernel reserved memory to previous crash_map/unmap_reserved_pages() implementation, the new one is more generic in name and cleaner in code (besides, some arch may not be allowed to unmap the pgtable). Therefore, this patch consolidates them, and uses the new arch_kexec_protect(unprotect)_crashkres() to replace former crash_map/unmap_reserved_pages() which by now has been only used by S390. The consolidation work needs the crash memory to be mapped initially, this is done in machine_kdump_pm_init() which is after reserve_crashkernel(). Once kdump kernel is loaded, the new arch_kexec_protect_crashkres() implemented for S390 will actually unmap the pgtable like before. Signed-off-by: Xunlei Pang <xlpang@redhat.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Minfei Huang <mhuang@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23kexec: do a cleanup for function kexec_loadMinfei Huang
There are a lof of work to be done in function kexec_load, not only for allocating structs and loading initram, but also for some misc. To make it more clear, wrap a new function do_kexec_load which is used to allocate structs and load initram. And the pre-work will be done in kexec_load. Signed-off-by: Minfei Huang <mnfhuang@gmail.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Xunlei Pang <xlpang@redhat.com> Cc: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23kexec: make a pair of map/unmap reserved pages in error pathMinfei Huang
For some arch, kexec shall map the reserved pages, then use them, when we try to start the kdump service. kexec may return directly, without unmaping the reserved pages, if it fails during starting service. To fix it, we make a pair of map/unmap reserved pages both in generic path and error path. This patch only affects s390. Other architecturess don't implement the interface of crash_unmap_reserved_pages and crash_map_reserved_pages. It isn't a urgent patch. Kernel can work well without any risk, although the reserved pages are not unmapped before returning in error path. Signed-off-by: Minfei Huang <mnfhuang@gmail.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Xunlei Pang <xlpang@redhat.com> Cc: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23kexec: provide arch_kexec_protect(unprotect)_crashkres()Xunlei Pang
Implement the protection method for the crash kernel memory reservation for the 64-bit x86 kdump. Signed-off-by: Xunlei Pang <xlpang@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Dave Young <dyoung@redhat.com> Cc: Minfei Huang <mhuang@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23kexec: introduce a protection mechanism for the crashkernel reserved memoryXunlei Pang
For the cases that some kernel (module) path stamps the crash reserved memory(already mapped by the kernel) where has been loaded the second kernel data, the kdump kernel will probably fail to boot when panic happens (or even not happens) leaving the culprit at large, this is unacceptable. The patch introduces a mechanism for detecting such cases: 1) After each crash kexec loading, it simply marks the reserved memory regions readonly since we no longer access it after that. When someone stamps the region, the first kernel will panic and trigger the kdump. The weak arch_kexec_protect_crashkres() is introduced to do the actual protection. 2) To allow multiple loading, once 1) was done we also need to remark the reserved memory to readwrite each time a system call related to kdump is made. The weak arch_kexec_unprotect_crashkres() is introduced to do the actual protection. The architecture can make its specific implementation by overriding arch_kexec_protect_crashkres() and arch_kexec_unprotect_crashkres(). Signed-off-by: Xunlei Pang <xlpang@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Dave Young <dyoung@redhat.com> Cc: Minfei Huang <mhuang@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23exec: remove the no longer needed remove_arg_zero()->free_arg_page()Oleg Nesterov
remove_arg_zero() does free_arg_page() for no reason. This was needed before and only if CONFIG_MMU=y: see commit 4fc75ff4816c ("exec: fix remove_arg_zero"), install_arg_page() was called for every page != NULL in bprm->page[] array. Today install_arg_page() has already gone and free_arg_page() is nop after another commit b6a2fea39318 ("mm: variable length argument support"). CONFIG_MMU=n does free_arg_pages() in free_bprm() and thus it doesn't need remove_arg_zero()->free_arg_page() too; apart from get_arg_page() it never checks if the page in bprm->page[] was allocated or not, so the "extra" non-freed page is fine. OTOH, this free_arg_page() can add the minor pessimization, the caller is going to do copy_strings_kernel() right after remove_arg_zero() which will likely need to re-allocate the same page again. And as Hujunjie pointed out, the "offset == PAGE_SIZE" check is wrong because we are going to increment bprm->p once again before return, so CONFIG_MMU=n "leaks" the page anyway if '0' is the final byte in this page. NOTE: remove_arg_zero() assumes that argv[0] is null-terminated but this is not necessarily true. copy_strings() does "len = strnlen_user(...)", then copy_from_user(len) but another thread or debuger can overwrite the trailing '0' in between. Afaics nothing really bad can happen because we must always have the null-terminated bprm->filename copied by the 1st copy_strings_kernel(), but perhaps we should change this code to check "bprm->p < bprm->exec" anyway, and/or change copy_strings() to ensure that the last byte in string is always zero. Link: http://lkml.kernel.org/r/20160517155335.GA31435@redhat.com Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reported by: hujunjie <jj.net@163.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23kernek/fork.c: allocate idle task for a CPU always on its local nodeAndi Kleen
Linux preallocates the task structs of the idle tasks for all possible CPUs. This currently means they all end up on node 0. This also implies that the cache line of MWAIT, which is around the flags field in the task struct, are all located in node 0. We see a noticeable performance improvement on Knights Landing CPUs when the cache lines used for MWAIT are located in the local nodes of the CPUs using them. I would expect this to give a (likely slight) improvement on other systems too. The patch implements placing the idle task in the node of its CPUs, by passing the right target node to copy_process() [akpm@linux-foundation.org: use NUMA_NO_NODE, not a bare -1] Link: http://lkml.kernel.org/r/1463492694-15833-1-git-send-email-andi@firstfloor.org Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23signal: move the "sig < SIGRTMIN" check into siginmask(sig)Oleg Nesterov
All the users of siginmask() must ensure that sig < SIGRTMIN. sig_fatal() doesn't and this is wrong: UBSAN: Undefined behaviour in kernel/signal.c:911:6 shift exponent 32 is too large for 32-bit type 'long unsigned int' the patch doesn't add the neccesary check to sig_fatal(), it moves the check into siginmask() and updates other callers. Link: http://lkml.kernel.org/r/20160517195052.GA15187@redhat.com Reported-by: Meelis Roos <mroos@linux.ee> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23kernel/signal.c: convert printk(KERN_<LEVEL> ...) to pr_<level>(...)Wang Xiaoqiang
Use pr_<level> instead of printk(KERN_<LEVEL> ). Signed-off-by: Wang Xiaoqiang <wangxq10@lzu.edu.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23signal: make oom_flags a boolTetsuo Handa
Currently the size of "struct signal_struct"->oom_flags member is sizeof(unsigned) bytes, but only one flag OOM_FLAG_ORIGIN which is updated by current thread is defined. We can convert OOM_FLAG_ORIGIN into a bool, and reuse the saved bytes for updating from the OOM killer and/or the OOM reaper thread. By the way, do we care about a race window between run_store() and swapoff() because it would be theoretically possible that two threads sharing the "struct signal_struct" concurrently call respective functions? If we care, we can make oom_flags an atomic_t. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23wait: allow sys_waitid() to accept __WNOTHREAD/__WCLONE/__WALLOleg Nesterov
I see no reason why waitid() can't support other linux-specific flags allowed in sys_wait4(). In particular this change can help if we reconsider the previous change ("wait/ptrace: assume __WALL if the child is traced") which adds the "automagical" __WALL for debugger. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Jan Kratochvil <jan.kratochvil@redhat.com> Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> Cc: Pedro Alves <palves@redhat.com> Cc: Roland McGrath <roland@hack.frob.com> Cc: <syzkaller@googlegroups.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23wait/ptrace: assume __WALL if the child is tracedOleg Nesterov
The following program (simplified version of generated by syzkaller) #include <pthread.h> #include <unistd.h> #include <sys/ptrace.h> #include <stdio.h> #include <signal.h> void *thread_func(void *arg) { ptrace(PTRACE_TRACEME, 0,0,0); return 0; } int main(void) { pthread_t thread; if (fork()) return 0; while (getppid() != 1) ; pthread_create(&thread, NULL, thread_func, NULL); pthread_join(thread, NULL); return 0; } creates an unreapable zombie if /sbin/init doesn't use __WALL. This is not a kernel bug, at least in a sense that everything works as expected: debugger should reap a traced sub-thread before it can reap the leader, but without __WALL/__WCLONE do_wait() ignores sub-threads. Unfortunately, it seems that /sbin/init in most (all?) distributions doesn't use it and we have to change the kernel to avoid the problem. Note also that most init's use sys_waitid() which doesn't allow __WALL, so the necessary user-space fix is not that trivial. This patch just adds the "ptrace" check into eligible_child(). To some degree this matches the "tsk->ptrace" in exit_notify(), ->exit_signal is mostly ignored when the tracee reports to debugger. Or WSTOPPED, the tracer doesn't need to set this flag to wait for the stopped tracee. This obviously means the user-visible change: __WCLONE and __WALL no longer have any meaning for debugger. And I can only hope that this won't break something, but at least strace/gdb won't suffer. We could make a more conservative change. Say, we can take __WCLONE into account, or !thread_group_leader(). But it would be nice to not complicate these historical/confusing checks. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: Jan Kratochvil <jan.kratochvil@redhat.com> Cc: "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> Cc: Pedro Alves <palves@redhat.com> Cc: Roland McGrath <roland@hack.frob.com> Cc: <syzkaller@googlegroups.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: fix block commentsRyusuke Konishi
This fixes block comments with proper formatting to eliminate the following checkpatch.pl warnings: "WARNING: Block comments use * on subsequent lines" "WARNING: Block comments use a trailing */ on a separate line" Link: http://lkml.kernel.org/r/1462886671-3521-8-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: remove loops of single statement macrosRyusuke Konishi
This fixes checkpatch.pl warning "WARNING: Single statement macros should not use a do {} while (0) loop". Link: http://lkml.kernel.org/r/1462886671-3521-7-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: remove unnecessary else after return or breakRyusuke Konishi
This fixes the checkpatch.pl warning that suggests else is not generally useful after a break or return. Link: http://lkml.kernel.org/r/1462886671-3521-6-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: avoid bare use of 'unsigned'Ryusuke Konishi
This fixes checkpatch.pl warning "WARNING: Prefer 'unsigned int' to bare use of 'unsigned'". Link: http://lkml.kernel.org/r/1462886671-3521-5-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: fix code indent coding style issueRyusuke Konishi
This fixes checkpatch.pl warning "WARNING: suspect code indent for conditional statements". Link: http://lkml.kernel.org/r/1462886671-3521-4-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: remove space before semicolonRyusuke Konishi
This fixes the checkpatch.pl warning "WARNING: space prohibited before semicolon" at nilfs_store_magic_and_option(). Link: http://lkml.kernel.org/r/1462886671-3521-3-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: do not emit extra newline on nilfs_warning() and nilfs_error()Ryusuke Konishi
This updates call sites of nilfs_warning() and nilfs_error() so that they don't add a duplicate newline. These output functions are already designed to add a trailing newline to the message. Link: http://lkml.kernel.org/r/1462886671-3521-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: clean trailing semicolons in macrosRyusuke Konishi
Remove trailing semicolons from macros, as suggested by checkpatch.pl. Link: http://lkml.kernel.org/r/1461935747-10380-12-git-send-email-konishi.ryusuke@lab.ntt.co.jp [konishi.ryusuke@lab.ntt.co.jp: fix style issues] Link: http://lkml.kernel.org/r/20160509.231703.1481729973362188932.konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: add missing line spacingRyusuke Konishi
Clean up checkpatch.pl warnings "WARNING: Missing a blank line after declarations" from nilfs2. Link: http://lkml.kernel.org/r/1461935747-10380-11-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: replace __attribute__((packed)) with __packedRyusuke Konishi
This fixes the following checkpatch.pl warning: WARNING: __packed is preferred over __attribute__((packed)) #23: FILE: export.h:23: +} __attribute__ ((packed)); Link: http://lkml.kernel.org/r/1461935747-10380-10-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: move cleanup code of metadata file from inode routinesRyusuke Konishi
Refactor nilfs_clear_inode() and nilfs_i_callback() so that cleanup code or resource deallocation related to metadata file will be moved out to mdt.c. Link: http://lkml.kernel.org/r/1461935747-10380-9-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: get rid of nilfs_mdt_mark_block_dirty()Ryusuke Konishi
nilfs_mdt_mark_block_dirty() can be replaced with primary functions like nilfs_mdt_get_block() and mark_buffer_dirty(), and it's used only by nilfs_ioctl_mark_blocks_dirty(). This gets rid of the function to simplify the interface of metadata file. Link: http://lkml.kernel.org/r/1461935747-10380-8-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: clarify permission to replicate the designRyusuke Konishi
To respond to a certain developer's request, this explicitly state that developers can reimplement the nilfs2 design for other operating systems to share data stored in that format. Link: http://lkml.kernel.org/r/1461935747-10380-7-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23MAINTAINERS: add web link for nilfs projectRyusuke Konishi
Add nilfs.osdn.jp as the second web site of nilfs project. Link: http://lkml.kernel.org/r/1461935747-10380-6-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: clean up old e-mail addressesRyusuke Konishi
E-mail addresses of osrg.net domain are no longer available. This removes them from authorship notices and prevents reporters from being confused. Link: http://lkml.kernel.org/r/1461935747-10380-5-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: remove FSF mailing address from GPL noticesRyusuke Konishi
This removes the extra paragraph which mentions FSF address in GPL notices from source code of nilfs2 and avoids the checkpatch.pl error related to it. Link: http://lkml.kernel.org/r/1461935747-10380-4-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: remove space before commaRyusuke Konishi
Fix checkpatch.pl error "ERROR: space prohibited before that ',' (ctx:WxW)" at nilfs_sufile_set_suinfo(). This also fixes checkpatch.pl warning "WARNING: Prefer 'unsigned int' to bare use of 'unsigned'" at nilfs_sufile_set_suinfo() and nilfs_sufile_get_suinfo(). Link: http://lkml.kernel.org/r/1461935747-10380-3-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: fix white space issue in nilfs_mount()Ryusuke Konishi
Fix the following checkpatch.pl error and warnings: ERROR: code indent should use tabs where possible #1317: FILE: super.c:1317: + ^I^Is_new = true;$ WARNING: please, no space before tabs #1317: FILE: super.c:1317: + ^I^Is_new = true;$ WARNING: please, no spaces at the start of a line #1317: FILE: super.c:1317: + ^I^Is_new = true;$ Link: http://lkml.kernel.org/r/1461935747-10380-2-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23nilfs2: constify nilfs_sc_operations structuresJulia Lawall
The nilfs_sc_operations structures are never modified, so declare them as const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/io.c:befs_bread(): remove unneeded initialization to NULLSalah Triki
bh is reinitialized by sb_bread() so no need to init it with NULL in the beginning of befs_bread() Link: http://lkml.kernel.org/r/88481760b43226fac16adb1f1e68897e47d8235c.1462841692.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/io.c:befs_bread_iaddr(): remove unneeded initialization to NULLSalah Triki
bh is reinitialized by sb_bread() so no need to init it with NULL in the beginning of befs_bread_iaddr() Link: http://lkml.kernel.org/r/586d2639d729345b9c07aac10ba713d8ceb8745a.1462841692.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/linuxvfs.c:befs_iget(): remove unneeded befs_nio initialization to NULLSalah Triki
befs_ino is reinitialized by BEFS_I() so no need to init it with NULL in the beginning of befs_iget() Link: http://lkml.kernel.org/r/a5c02445e436629c4d4ba1b65d91501878942f58.1462842887.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/linuxvfs.c:befs_iget(): remove unneeded raw_inode initialization to NULLSalah Triki
raw_inode is reinitialized to bh->b_data so no need to init it with NULL in the beginning of befs_iget() Link: http://lkml.kernel.org/r/0a66baaaacb6b7e5fcea5b31b57b649261152281.1462842887.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/linuxvfs.c:befs_iget(): remove unneeded initialization to NULLSalah Triki
bh is reinitialized by befs_bread() so no need to init it with NULL in the beginning of befs_iget() Link: http://lkml.kernel.org/r/38d62b1469bc3b316ba6b81fd8e26fc66fdd713b.1462842886.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/linuxvfs.c:befs_get_block(): remove unneeded initialization to NULLSalah Triki
inode is reinitialized by befs_iget() so no need to init it with NULL in the beginning of befs_lookup() Link: http://lkml.kernel.org/r/03d7e46890aef94078130bed97c4f8f8ae9ea2b2.1462842886.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/datastream.c:befs_find_brun_dblindirect(): remove unneeded ↵Salah Triki
initializations to NULL iaddr_array is unconditionally initialized to NULL in befs_find_brun_dblindirect(). Link: http://lkml.kernel.org/r/940def273e30ef37957fba9da6981a10fb3c9741.1462649034.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/datastream.c:befs_read_lsymlink(): remove unneeded initialization to ↵Salah Triki
NULL bh is reinitialized by befs_read_datastream() so no need to init it with NULL in the beginning of befs_read_lsymlink(). Link: http://lkml.kernel.org/r/e22f279bceb8d026af048952e02ba98925b21c92.1462649034.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23fs/befs/datastream.c:befs_read_datastream(): remove unneeded initialization ↵Salah Triki
to NULL bh is reinitialized by befs_bread_iaddr() so no need to init it with NULL in the beginning of befs_read_datastream(). Link: http://lkml.kernel.org/r/81e1f70187db34d195c8e42b1ff78be6a71c0060.1462649034.git.salah.triki@acm.org Signed-off-by: Salah Triki <salah.triki@acm.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23mm: memcontrol: fix possible css ref leak on oomVladimir Davydov
mem_cgroup_oom may be invoked multiple times while a process is handling a page fault, in which case current->memcg_in_oom will be overwritten leaking the previously taken css reference. Link: http://lkml.kernel.org/r/1464019330-7579-1-git-send-email-vdavydov@virtuozzo.com Signed-off-by: Vladimir Davydov <vdavydov@virtuozzo.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23ELF/MIPS build fixRalf Baechle
CONFIG_MIPS32_N32=y but CONFIG_BINFMT_ELF disabled results in the following linker errors: arch/mips/built-in.o: In function `elf_core_dump': binfmt_elfn32.c:(.text+0x23dbc): undefined reference to `elf_core_extra_phdrs' binfmt_elfn32.c:(.text+0x246e4): undefined reference to `elf_core_extra_data_size' binfmt_elfn32.c:(.text+0x248d0): undefined reference to `elf_core_write_extra_phdrs' binfmt_elfn32.c:(.text+0x24ac4): undefined reference to `elf_core_write_extra_data' CONFIG_MIPS32_O32=y but CONFIG_BINFMT_ELF disabled results in the following linker errors: arch/mips/built-in.o: In function `elf_core_dump': binfmt_elfo32.c:(.text+0x28a04): undefined reference to `elf_core_extra_phdrs' binfmt_elfo32.c:(.text+0x29330): undefined reference to `elf_core_extra_data_size' binfmt_elfo32.c:(.text+0x2951c): undefined reference to `elf_core_write_extra_phdrs' binfmt_elfo32.c:(.text+0x29710): undefined reference to `elf_core_write_extra_data' This is because binfmt_elfn32 and binfmt_elfo32 are using symbols from elfcore but for these configurations elfcore will not be built. Fixed by making elfcore selectable by a separate config symbol which unlike the current mechanism can also be used from other directories than kernel/, then having each flavor of ELF that relies on elfcore.o, select it in Kconfig, including CONFIG_MIPS32_N32 and CONFIG_MIPS32_O32 which fixes this issue. Link: http://lkml.kernel.org/r/20160520141705.GA1913@linux-mips.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Reviewed-by: James Hogan <james.hogan@imgtec.com> Cc: "Maciej W. Rozycki" <macro@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23m32r: fix build failureSudip Mukherjee
m32r allmodconfig build was failing with the error: ERROR: "smp_flush_cache_all" [drivers/misc/lkdtm.ko] undefined! lkdtm driver at drivers/misc is using flush_icache_range() which for m32r is defined as smp_flush_cache_all() if CONFIG_SMP is defined. But as smp_flush_cache_all() was not exported so the build was failing with the error of undefined symbol. Link: http://lkml.kernel.org/r/1464001182-8329-1-git-send-email-sudipm.mukherjee@gmail.com Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-22Merge tag 'trace-v4.7-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull motr tracing updates from Steven Rostedt: "Three more changes. - I forgot that I had another selftest to stress test the ftrace instance creation. It was actually suppose to go into the 4.6 merge window, but I never committed it. I almost forgot about it again, but noticed it was missing from your tree. - Soumya PN sent me a clean up patch to not disable interrupts when taking the tasklist_lock for read, as it's unnecessary because that lock is never taken for write in irq context. - Newer gcc's can cause the jump in the function_graph code to the global ftrace_stub label to be a short jump instead of a long one. As that jump is dynamically converted to jump to the trace code to do function graph tracing, and that conversion expects a long jump it can corrupt the ftrace_stub itself (it's directly after that call). One way to prevent gcc from using a short jump is to declare the ftrace_stub as a weak function, which we do here to keep gcc from optimizing too much" * tag 'trace-v4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ftrace/x86: Set ftrace_stub to weak to prevent gcc from using short jumps to it ftrace: Don't disable irqs when taking the tasklist_lock read_lock ftracetest: Add instance created, delete, read and enable event test
2016-05-22Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu Pull m68knommu update from Greg Ungerer: "Only a single change to update my email address in the MAINTAINERS file" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu: m68k: change m68knommu maintainer email address
2016-05-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds
Pull sparc updates from David Miller: "Some 32-bit kgdb cleanups from Sam Ravnborg, and a hugepage TLB flush overhead fix on 64-bit from Nitin Gupta" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc64: Reduce TLB flushes during hugepte changes aeroflex/greth: fix warning about unused variable openprom: fix warning sparc32: drop superfluous cast in calls to __nocache_pa() sparc32: fix build with STRICT_MM_TYPECHECKS sparc32: use proper prototype for trapbase sparc32: drop local prototype in kgdb_32 sparc32: drop hardcoding trap_level in kgdb_trap
2016-05-22x86: remove more uaccess_32.h complexityLinus Torvalds
I'm looking at trying to possibly merge the 32-bit and 64-bit versions of the x86 uaccess.h implementation, but first this needs to be cleaned up. For example, the 32-bit version of "__copy_from_user_inatomic()" is mostly the special cases for the constant size, and it's actually almost never relevant. Most users aren't actually using a constant size anyway, and the few cases that do small constant copies are better off just using __get_user() instead. So get rid of the unnecessary complexity. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-22x86: remove pointless uaccess_32.h complexityLinus Torvalds
I'm looking at trying to possibly merge the 32-bit and 64-bit versions of the x86 uaccess.h implementation, but first this needs to be cleaned up. For example, the 32-bit version of "__copy_to_user_inatomic()" is mostly the special cases for the constant size, and it's actually never relevant. Every user except for one aren't actually using a constant size anyway, and the one user that uses it is better off just using __put_user() instead. So get rid of the unnecessary complexity. [ The same cleanup should likely happen to __copy_from_user_inatomic() as well, but that one has a lot more users that I need to take a look at first ] Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-21Merge tag 'for-f2fs-4.7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs Pull f2fs updates from Jaegeuk Kim: "In this round, as Ted pointed out, fscrypto allows one more key prefix given by filesystem to resolve backward compatibility issues. Other than that, we've fixed several error handling cases by introducing a fault injection facility. We've also achieved performance improvement in some workloads as well as a bunch of bug fixes. Summary: Enhancements: - fs-specific prefix for fscrypto - fault injection facility - expose validity bitmaps for user to be aware of fragmentation - fallocate/rm/preallocation speed up - use percpu counters Bug fixes: - some inline_dentry/inline_data bugs - error handling for atomic/volatile/orphan inodes - recover broken superblock" * tag 'for-f2fs-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (73 commits) f2fs: fix to update dirty page count correctly f2fs: flush pending bios right away when error occurs f2fs: avoid ENOSPC fault in the recovery process f2fs: make exit_f2fs_fs more clear f2fs: use percpu_counter for total_valid_inode_count f2fs: use percpu_counter for alloc_valid_block_count f2fs: use percpu_counter for # of dirty pages in inode f2fs: use percpu_counter for page counters f2fs: use bio count instead of F2FS_WRITEBACK page count f2fs: manipulate dirty file inodes when DATA_FLUSH is set f2fs: add fault injection to sysfs f2fs: no need inc dirty pages under inode lock f2fs: fix incorrect error path handling in f2fs_move_rehashed_dirents f2fs: fix i_current_depth during inline dentry conversion f2fs: correct return value type of f2fs_fill_super f2fs: fix deadlock when flush inline data f2fs: avoid f2fs_bug_on during recovery f2fs: show # of orphan inodes f2fs: support in batch fzero in dnode page f2fs: support in batch multi blocks preallocation ...
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