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2012-09-27powerpc: Remove tlb batching hack for nighthawkMichael Ellerman
In hpte_init_native() we call tlb_batching_enabled() to decide if we should setup ppc_md.flush_hash_range. tlb_batching_enabled() checks the _unflattened_ device tree, to see if we are running on a nighthawk. Since commit a223535 ("dont allow pSeries_probe to succeed without initialising MMU", Dec 2006), hpte_init_native() has been called from pSeries_probe() - at which point we have not yet unflattened the device tree. This means tlb_batching_enabled() will always return true, so the hack has effectively been disabled since Dec 2006. Ergo, I think we can drop it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-27powerpc: Set paca->data_offset = 0 for boot cpuMichael Ellerman
In commit 407821a we assigned a poison value to the paca->data_offset. Unfortunately with CONFIG_LOCK_STAT=y lockdep will read & write to percpu data very early in boot, prior to us initialising the percpu areas, leading to a crash. We have been getting away with this because the data_offset was previously set to zero. This causes lockdep to read & write to the initial copy of the percpu variables, which are discarded later in boot. Although that is "fishy", it does work, and for lock statistics it is no big deal to discard the counts from early boot. So set the paca->data_offset = 0 for the boot cpu paca only. Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-27powerpc/perf: Sample only if SIAR-Valid bit is set in P7+sukadev@linux.vnet.ibm.com
powerpc/perf: Sample only if SIAR-Valid bit is set in P7+ On POWER7+ two new bits (mmcra[35] and mmcra[36]) indicate whether the contents of SIAR and SDAR are valid. For marked instructions on P7+, we must save the contents of SIAR and SDAR registers only if these new bits are set. This code/check for the SIAR-Valid bit is specific to P7+, so rather than waste a CPU-feature bit use the PVR flag. Note that Carl Love proposed a similar change for oprofile: https://lkml.org/lkml/2012/6/22/309 Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-09-27Merge remote-tracking branch 'kumar/next' into nextBenjamin Herrenschmidt
A few more fsl updates from Kumar
2012-09-27Merge remote-tracking branch 'agust/next' into nextBenjamin Herrenschmidt
mpc5xxx updates from Anatolij
2012-09-27md/raid10: fix "enough" function for detecting if array is failed.NeilBrown
The 'enough' function is written to work with 'near' arrays only in that is implicitly assumes that the offset from one 'group' of devices to the next is the same as the number of copies. In reality it is the number of 'near' copies. So change it to make this number explicit. This bug makes it possible to run arrays without enough drives present, which is dangerous. It is appropriate for an -stable kernel, but will almost certainly need to be modified for some of them. Cc: stable@vger.kernel.org Reported-by: Jakub Husák <jakub@gooseman.cz> Signed-off-by: NeilBrown <neilb@suse.de>
2012-09-26intel_idle: enable IVB Xeon supportLen Brown
IVB Xeon currently shares the same parameters IVB client. Signed-off-by: Len Brown <len.brown@intel.com>
2012-09-26ext4: enable FITRIM ioctl on bigalloc file systemLukas Czerner
With a minor tweaks regarding minimum extent size to discard and discarded bytes reporting the FITRIM can be enabled on bigalloc file system and it works without any problem. This patch fixes minlen handling and discarded bytes reporting to take into consideration bigalloc enabled file systems and finally removes the restriction and allow FITRIM to be used on file system with bigalloc feature enabled. Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com> Signed-off-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-09-26coredump: prevent double-free on an error path in core dumperDenys Vlasenko
In !CORE_DUMP_USE_REGSET case, if elf_note_info_init fails to allocate memory for info->fields, it frees already allocated stuff and returns error to its caller, fill_note_info. Which in turn returns error to its caller, elf_core_dump. Which jumps to cleanup label and calls free_note_info, which will happily try to free all info->fields again. BOOM. This is the fix. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> Cc: Venu Byravarasu <vbyravarasu@nvidia.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2012-09-26usb/gadget: fix misannotationsAl Viro
__user * != * __user Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26fcntl: fix misannotationsAl Viro
__user * != * __user... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26ceph: don't abuse d_delete() on failure exitsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26hypfs: ->d_parent is never NULL or negativeAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26vfs: delete surplus inode NULL checkAlan Cox
Each iteration of d_delete we reload inode from dentry->d_inode and then call S_ISDIR(inode-i_mode), so inode cannot possibly be NULL shortly afterwards unless something went horribly wrong. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch simple cases of fget_light to fdgetAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26ext4: fix fdatasync() for files with only i_size changesJan Kara
Code tracking when transaction needs to be committed on fdatasync(2) forgets to handle a situation when only inode's i_size is changed. Thus in such situations fdatasync(2) doesn't force transaction with new i_size to disk and that can result in wrong i_size after a crash. Fix the issue by updating inode's i_datasync_tid whenever its size is updated. CC: <stable@vger.kernel.org> # >= 2.6.32 Reported-by: Kristian Nielsen <knielsen@knielsen-hq.org> Signed-off-by: Jan Kara <jack@suse.cz>
2012-09-26ext4: always set i_op in ext4_mknod()Bernd Schubert
ext4_special_inode_operations have their own ifdef CONFIG_EXT4_FS_XATTR to mask those methods. And ext4_iget also always sets it, so there is an inconsistency. Signed-off-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@vger.kernel.org
2012-09-26new helpers: fdget()/fdput()Al Viro
Signed-off-bs: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch o2hb_region_dev_write() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26proc_map_files_readdir(): don't bother with grabbing filesAl Viro
all we need is their ->f_mode, so just collect _that_ Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26make get_file() return its argumentAl Viro
simplifies a bunch of callers... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26vhost_set_vring(): turn pollstart/pollstop into boolAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch prctl_set_mm_exe_file() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch xfs_find_handle() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch xfs_swapext() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch coda get_device_index() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch infinibarf users of fget() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch vfio_group_set_container() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch btrfs_ioctl_clone() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch mqueue syscalls to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch SNDRV_PCM_IOCTL_LINK to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch timerfd_[sg]ettime(2) to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch epoll_wait(2) to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch btrfs_ioctl_snap_create_transid() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch EXT4_IOC_MOVE_EXT to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26export fget_lightAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26ext4: close struct file leak on EXT4_IOC_MOVE_EXTAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch hpux_getdents() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch itanic perfmonctl(2) to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch osf_getdirentries() to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch readahead(2) to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch fadvise(2) to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch fchmod(2) to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch fallocate(2) to fget_light()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26switch ftruncate(2) to fget_lightAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26namei.c: fix BS commentAl Viro
get_write_access() is needed for nfsd, not binfmt_aout (the latter has no business doing anything of that kind, of course) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26don't leak O_CLOEXEC into ->f_flagsAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26procfs: Convert /proc/pid/fdinfo/ handling routines to seq-file v2Cyrill Gorcunov
This patch converts /proc/pid/fdinfo/ handling routines to seq-file which is needed to extend seq operations and plug in auxiliary fdinfo provides from subsystems like eventfd/eventpoll/fsnotify. Note the proc_fd_link no longer call for proc_fd_info, simply because the guts of proc_fd_info() got merged into ->show() of that seq_file Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26procfs: Move /proc/pid/fd[info] handling code to fd.[ch]Cyrill Gorcunov
This patch prepares the ground for further extension of /proc/pid/fd[info] handling code by moving fdinfo handling code into fs/proc/fd.c. I think such move makes both fs/proc/base.c and fs/proc/fd.c easier to read. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Acked-by: Pavel Emelyanov <xemul@parallels.com> CC: Al Viro <viro@ZenIV.linux.org.uk> CC: Alexey Dobriyan <adobriyan@gmail.com> CC: Andrew Morton <akpm@linux-foundation.org> CC: James Bottomley <jbottomley@parallels.com> CC: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> CC: Alexey Dobriyan <adobriyan@gmail.com> CC: Matthew Helsley <matt.helsley@gmail.com> CC: "J. Bruce Fields" <bfields@fieldses.org> CC: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-09-26new helper: daemonize_descriptors()Al Viro
descriptor-related parts of daemonize, done right. As the result we simplify the locking rules for ->files - we hold task_lock in *all* cases when we modify ->files. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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