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| author | Thomas Gleixner <tglx@linutronix.de> | 2009-03-16 13:07:21 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-03-16 15:32:28 +0100 |
| commit | 250981e6e1ef04947eccaa55e8c25ddcaa47a02e (patch) | |
| tree | 0c6f576501be490b495d7e274f71f1e2903de662 /arch/x86/kernel/process.c | |
| parent | 0f3fa48a7eaf5d1118cfda1650e8c759b2a116e4 (diff) | |
| download | blackbird-op-linux-250981e6e1ef04947eccaa55e8c25ddcaa47a02e.tar.gz blackbird-op-linux-250981e6e1ef04947eccaa55e8c25ddcaa47a02e.zip | |
x86: reduce preemption off section in exit thread
Impact: latency improvement
No need to keep preemption disabled over the kfree call.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/process.c')
| -rw-r--r-- | arch/x86/kernel/process.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 6afa5232dbb7..156f87582c6c 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -65,11 +65,11 @@ void exit_thread(void) { struct task_struct *me = current; struct thread_struct *t = &me->thread; + unsigned long *bp = t->io_bitmap_ptr; - if (me->thread.io_bitmap_ptr) { + if (bp) { struct tss_struct *tss = &per_cpu(init_tss, get_cpu()); - kfree(t->io_bitmap_ptr); t->io_bitmap_ptr = NULL; clear_thread_flag(TIF_IO_BITMAP); /* @@ -78,6 +78,7 @@ void exit_thread(void) memset(tss->io_bitmap, 0xff, t->io_bitmap_max); t->io_bitmap_max = 0; put_cpu(); + kfree(bp); } ds_exit_thread(current); |
