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author | Sean Paul <seanpaul@chromium.org> | 2017-05-18 09:24:30 -0400 |
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committer | Sean Paul <seanpaul@chromium.org> | 2017-05-18 09:24:30 -0400 |
commit | 6b7781b42dc9bc9bcd1523b6c24b876cdda0bef3 (patch) | |
tree | ee55c67e4ea30b9eb44f301ba0bde2e631a26162 /arch/x86/lib/delay.c | |
parent | 52d9d38c183bf0e09601d875ea31bb53c05dd8cf (diff) | |
parent | e98c58e55f68f8785aebfab1f8c9a03d8de0afe1 (diff) |
Merge remote-tracking branch 'airlied/drm-next' into drm-misc-next
Picking up drm-next @ 4.12-rc1 in order to apply Michal Hocko's vmalloc patch set
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Diffstat (limited to 'arch/x86/lib/delay.c')
-rw-r--r-- | arch/x86/lib/delay.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c index a8e91ae89fb3..29df077cb089 100644 --- a/arch/x86/lib/delay.c +++ b/arch/x86/lib/delay.c @@ -93,6 +93,13 @@ static void delay_mwaitx(unsigned long __loops) { u64 start, end, delay, loops = __loops; + /* + * Timer value of 0 causes MWAITX to wait indefinitely, unless there + * is a store on the memory monitored by MONITORX. + */ + if (loops == 0) + return; + start = rdtsc_ordered(); for (;;) { |