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| author |   Peter Zijlstra <peterz@infradead.org> | 2014-04-11 09:59:08 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2014-05-08 09:16:55 +0200 |
| commit | 04075425331f91f7176a34232c21b63af0eafc53 (patch) | |
| tree | b17a6f3c93d1b8eb83936de92da9f7691ce242c2 /arch/x86/kernel/apm_32.c | |
| parent | sched/idle, tile: Switch from TS_POLLING to TIF_POLLING_NRFLAG (diff) | |
| download | linux-dev-04075425331f91f7176a34232c21b63af0eafc53.tar.xz linux-dev-04075425331f91f7176a34232c21b63af0eafc53.zip | |
sched/idle, ia64: Switch from TS_POLLING to TIF_POLLING_NRFLAG
Standardize the idle polling indicator to TIF_POLLING_NRFLAG such that
both TIF_NEED_RESCHED and TIF_POLLING_NRFLAG are in the same word.
This will allow us, using fetch_or(), to both set NEED_RESCHED and
check for POLLING_NRFLAG in a single operation and avoid pointless
wakeups.
Changing from the non-atomic thread_info::status flags to the atomic
thread_info::flags shouldn't be a big issue since most polling state
changes were followed/preceded by a full memory barrier anyway.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: linux-ia64@vger.kernel.org
Link: http://lkml.kernel.org/n/tip-6633akuird5hi3si4gbegkm8@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/apm_32.c')
0 files changed, 0 insertions, 0 deletions