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authorLinus Torvalds <torvalds@linux-foundation.org>2020-10-25 10:59:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-25 10:59:34 -0700
commitf9c25d98645ec4af00c01a70681d2d4ab71622d0 (patch)
treec925b3a50d2728bc70ce4ddfe914115e202e6495 /arch/parisc/kernel
parentbd6aabc7ca39dd28a27fe1ec99e36e941cfb8192 (diff)
parent2e34ae02a9b49d1f459d811ae77d72d300584a69 (diff)
Merge branch 'parisc-5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull more parisc updates from Helge Deller: - During this merge window O_NONBLOCK was changed to become 000200000, but we missed that the syscalls timerfd_create(), signalfd4(), eventfd2(), pipe2(), inotify_init1() and userfaultfd() do a strict bit-wise check of the flags parameter. To provide backward compatibility with existing userspace we introduce parisc specific wrappers for those syscalls which filter out the old O_NONBLOCK value and replaces it with the new one. - Prevent HIL bus driver to get stuck when keyboard or mouse isn't attached - Improve error return codes when setting rtc time - Minor documentation fix in pata_ns87415.c * 'parisc-5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: ata: pata_ns87415.c: Document support on parisc with superio chip parisc: Add wrapper syscalls to fix O_NONBLOCK flag usage hil/parisc: Disable HIL driver when it gets stuck parisc: Improve error return codes when setting rtc time
Diffstat (limited to 'arch/parisc/kernel')
-rw-r--r--arch/parisc/kernel/sys_parisc.c73
-rw-r--r--arch/parisc/kernel/syscalls/syscall.tbl12
-rw-r--r--arch/parisc/kernel/time.c11
3 files changed, 87 insertions, 9 deletions
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 5d458a44b09c..9549496f5523 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -6,7 +6,7 @@
* Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
* Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
* Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
- * Copyright (C) 1999-2014 Helge Deller <deller@gmx.de>
+ * Copyright (C) 1999-2020 Helge Deller <deller@gmx.de>
*/
#include <linux/uaccess.h>
@@ -23,6 +23,7 @@
#include <linux/utsname.h>
#include <linux/personality.h>
#include <linux/random.h>
+#include <linux/compat.h>
/* we construct an artificial offset for the mapping based on the physical
* address of the kernel mapping variable */
@@ -373,3 +374,73 @@ long parisc_personality(unsigned long personality)
return err;
}
+
+/*
+ * Up to kernel v5.9 we defined O_NONBLOCK as 000200004,
+ * since then O_NONBLOCK is defined as 000200000.
+ *
+ * The following wrapper functions mask out the old
+ * O_NDELAY bit from calls which use O_NONBLOCK.
+ *
+ * XXX: Remove those in year 2022 (or later)?
+ */
+
+#define O_NONBLOCK_OLD 000200004
+#define O_NONBLOCK_MASK_OUT (O_NONBLOCK_OLD & ~O_NONBLOCK)
+
+static int FIX_O_NONBLOCK(int flags)
+{
+ if (flags & O_NONBLOCK_MASK_OUT) {
+ struct task_struct *tsk = current;
+ pr_warn_once("%s(%d) uses a deprecated O_NONBLOCK value.\n",
+ tsk->comm, tsk->pid);
+ }
+ return flags & ~O_NONBLOCK_MASK_OUT;
+}
+
+asmlinkage long parisc_timerfd_create(int clockid, int flags)
+{
+ flags = FIX_O_NONBLOCK(flags);
+ return sys_timerfd_create(clockid, flags);
+}
+
+asmlinkage long parisc_signalfd4(int ufd, sigset_t __user *user_mask,
+ size_t sizemask, int flags)
+{
+ flags = FIX_O_NONBLOCK(flags);
+ return sys_signalfd4(ufd, user_mask, sizemask, flags);
+}
+
+#ifdef CONFIG_COMPAT
+asmlinkage long parisc_compat_signalfd4(int ufd,
+ compat_sigset_t __user *user_mask,
+ compat_size_t sizemask, int flags)
+{
+ flags = FIX_O_NONBLOCK(flags);
+ return compat_sys_signalfd4(ufd, user_mask, sizemask, flags);
+}
+#endif
+
+asmlinkage long parisc_eventfd2(unsigned int count, int flags)
+{
+ flags = FIX_O_NONBLOCK(flags);
+ return sys_eventfd2(count, flags);
+}
+
+asmlinkage long parisc_userfaultfd(int flags)
+{
+ flags = FIX_O_NONBLOCK(flags);
+ return sys_userfaultfd(flags);
+}
+
+asmlinkage long parisc_pipe2(int __user *fildes, int flags)
+{
+ flags = FIX_O_NONBLOCK(flags);
+ return sys_pipe2(fildes, flags);
+}
+
+asmlinkage long parisc_inotify_init1(int flags)
+{
+ flags = FIX_O_NONBLOCK(flags);
+ return sys_inotify_init1(flags);
+}
diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl
index 38c63e5404bc..f375ea528e59 100644
--- a/arch/parisc/kernel/syscalls/syscall.tbl
+++ b/arch/parisc/kernel/syscalls/syscall.tbl
@@ -344,17 +344,17 @@
304 common eventfd sys_eventfd
305 32 fallocate parisc_fallocate
305 64 fallocate sys_fallocate
-306 common timerfd_create sys_timerfd_create
+306 common timerfd_create parisc_timerfd_create
307 32 timerfd_settime sys_timerfd_settime32
307 64 timerfd_settime sys_timerfd_settime
308 32 timerfd_gettime sys_timerfd_gettime32
308 64 timerfd_gettime sys_timerfd_gettime
-309 common signalfd4 sys_signalfd4 compat_sys_signalfd4
-310 common eventfd2 sys_eventfd2
+309 common signalfd4 parisc_signalfd4 parisc_compat_signalfd4
+310 common eventfd2 parisc_eventfd2
311 common epoll_create1 sys_epoll_create1
312 common dup3 sys_dup3
-313 common pipe2 sys_pipe2
-314 common inotify_init1 sys_inotify_init1
+313 common pipe2 parisc_pipe2
+314 common inotify_init1 parisc_inotify_init1
315 common preadv sys_preadv compat_sys_preadv
316 common pwritev sys_pwritev compat_sys_pwritev
317 common rt_tgsigqueueinfo sys_rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo
@@ -387,7 +387,7 @@
341 common bpf sys_bpf
342 common execveat sys_execveat compat_sys_execveat
343 common membarrier sys_membarrier
-344 common userfaultfd sys_userfaultfd
+344 common userfaultfd parisc_userfaultfd
345 common mlock2 sys_mlock2
346 common copy_file_range sys_copy_file_range
347 common preadv2 sys_preadv2 compat_sys_preadv2
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 04508158815c..13d94f0f94a0 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -180,9 +180,16 @@ static int rtc_generic_get_time(struct device *dev, struct rtc_time *tm)
static int rtc_generic_set_time(struct device *dev, struct rtc_time *tm)
{
time64_t secs = rtc_tm_to_time64(tm);
-
- if (pdc_tod_set(secs, 0) < 0)
+ int ret;
+
+ /* hppa has Y2K38 problem: pdc_tod_set() takes an u32 value! */
+ ret = pdc_tod_set(secs, 0);
+ if (ret != 0) {
+ pr_warn("pdc_tod_set(%lld) returned error %d\n", secs, ret);
+ if (ret == PDC_INVALID_ARG)
+ return -EINVAL;
return -EOPNOTSUPP;
+ }
return 0;
}