Commit-ID: 8b80fd8b45458a7d0b726d454c51c5219e0fb2ee Gitweb: http://git.kernel.org/tip/8b80fd8b45458a7d0b726d454c51c5219e0fb2ee Author: Ross Zwisler <ross.zwis...@linux.intel.com> AuthorDate: Wed, 26 Feb 2014 12:06:50 -0700 Committer: H. Peter Anvin <h...@linux.intel.com> CommitDate: Thu, 27 Feb 2014 08:26:10 -0800
x86: Use clflushopt in clflush_cache_range If clflushopt is available on the system, use it instead of clflush in clflush_cache_range. Signed-off-by: Ross Zwisler <ross.zwis...@linux.intel.com> Link: http://lkml.kernel.org/r/1393441612-19729-3-git-send-email-ross.zwis...@linux.intel.com Signed-off-by: H. Peter Anvin <h...@linux.intel.com> --- arch/x86/mm/pageattr.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index b3b19f4..b1c4672 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -126,8 +126,8 @@ within(unsigned long addr, unsigned long start, unsigned long end) * @vaddr: virtual start address * @size: number of bytes to flush * - * clflush is an unordered instruction which needs fencing with mfence - * to avoid ordering issues. + * clflushopt is an unordered instruction which needs fencing with mfence or + * sfence to avoid ordering issues. */ void clflush_cache_range(void *vaddr, unsigned int size) { @@ -136,11 +136,11 @@ void clflush_cache_range(void *vaddr, unsigned int size) mb(); for (; vaddr < vend; vaddr += boot_cpu_data.x86_clflush_size) - clflush(vaddr); + clflushopt(vaddr); /* * Flush any possible final partial cacheline: */ - clflush(vend); + clflushopt(vend); mb(); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
