diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-02-28 19:10:46 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@rostedt.homelinux.com> | 2012-10-26 14:42:39 -0400 |
| commit | c71b686851c285c95ff969661433b73e2820b85f (patch) | |
| tree | da4adf29b0bd1c490e751aca904f6290811f7741 | |
| parent | 20ed6512ce4498df31cca46f67fa68c074162793 (diff) | |
x86: vdso: Remove bogus locking in update_vsyscall_tz()
Changing the sequence count in update_vsyscall_tz() is completely
pointless.
The vdso code copies the data unprotected. There is no point to change
this as sys_tz is nowhere protected at all. See sys_gettimeofday().
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable-rt@vger.kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | arch/x86/kernel/vsyscall_64.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c index 0a7dc1396bb5..c378a1859fc2 100644 --- a/arch/x86/kernel/vsyscall_64.c +++ b/arch/x86/kernel/vsyscall_64.c @@ -58,12 +58,7 @@ DEFINE_VVAR(struct vsyscall_gtod_data, vsyscall_gtod_data) = void update_vsyscall_tz(void) { - unsigned long flags; - - write_seqlock_irqsave(&vsyscall_gtod_data.lock, flags); - /* sys_tz has changed */ vsyscall_gtod_data.sys_tz = sys_tz; - write_sequnlock_irqrestore(&vsyscall_gtod_data.lock, flags); } void update_vsyscall(struct timespec *wall_time, struct timespec *wtm, |