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| author |   Peter Zijlstra <peterz@infradead.org> | 2018-03-15 11:49:36 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2018-03-20 08:23:25 +0100 |
| commit | b3fc5c9bb373661224906bf434c09ca0de032e82 (patch) | |
| tree | a93c79001c75d325e20d6325a1838b6f00510674 /kernel/sched/wait_bit.c | |
| parent | sched/wait: Remove the wait_on_atomic_t() API (diff) | |
| download | linux-dev-b3fc5c9bb373661224906bf434c09ca0de032e82.tar.xz linux-dev-b3fc5c9bb373661224906bf434c09ca0de032e82.zip | |
sched/wait: Improve __var_waitqueue() code generation
Since we fixed hash_64() to not suck there is no need to play games to
attempt to improve the hash value on 64-bit.
Also, since we don't use the bit value for the variables, use hash_ptr()
directly.
No change in functionality.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: George Spelvin <linux@sciencehorizons.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/wait_bit.c')
| -rw-r--r-- | kernel/sched/wait_bit.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/kernel/sched/wait_bit.c b/kernel/sched/wait_bit.c index 60a84f5a6cb4..c67c6d24adc2 100644 --- a/kernel/sched/wait_bit.c +++ b/kernel/sched/wait_bit.c @@ -151,12 +151,7 @@ EXPORT_SYMBOL(wake_up_bit); wait_queue_head_t *__var_waitqueue(void *p) { - if (BITS_PER_LONG == 64) { - unsigned long q = (unsigned long)p; - - return bit_waitqueue((void *)(q & ~1), q & 1); - } - return bit_waitqueue(p, 0); + return bit_wait_table + hash_ptr(p, WAIT_TABLE_BITS); } EXPORT_SYMBOL(__var_waitqueue); |