diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-02-28 19:10:46 +0100 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-03-24 09:28:55 -0500 |
| commit | 065a78e4371ded1a5d71771b677fee1f7e56cf35 (patch) | |
| tree | aa2a284c5f542cb3199723ead67373c5ef24bc40 /arch | |
| parent | e21b1cc7256d319a579fa4723267c9795094d367 (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>
Diffstat (limited to 'arch')
| -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 e4d4a22e8b94..f04adbd6f6f4 100644 --- a/arch/x86/kernel/vsyscall_64.c +++ b/arch/x86/kernel/vsyscall_64.c @@ -80,12 +80,7 @@ early_param("vsyscall", vsyscall_setup); 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, |