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x86: Use clflushopt in drm_clflush_virt_range

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If clflushopt is available on the system, use it instead of clflush in
drm_clflush_virt_range.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Link: http://lkml.kernel.org/r/1393441612-19729-5-git-send-email-ross.zwisler@linux.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Ross Zwisler 2014-02-26 12:06:52 -07:00 • committed by H. Peter Anvin
parent 2a0c772f19
commit 2a0788dc9b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_cache.c
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@ -139,7 +139,7 @@ drm_clflush_virt_range(char *addr, unsigned long length)
mb(); mb();
for (; addr < end; addr += boot_cpu_data.x86_clflush_size) for (; addr < end; addr += boot_cpu_data.x86_clflush_size)
clflush(addr); clflush(addr);
clflush(end - 1); clflushopt(end - 1);
mb(); mb();
return; return;
} }