powerpc/thp: Add write barrier after updating the valid bit

Browse source

commit b0aa44a3df upstream.

With hugepages, we store the hpte valid information in the pte page
whose address is stored in the second half of the PMD. Use a
write barrier to make sure clearing pmd busy bit and updating
hpte valid info are ordered properly.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Aneesh Kumar K.V 2014-08-13 12:31:57 +05:30 • committed by Greg Kroah-Hartman

parent 4a63fb153d

commit da88dbe046

1 changed files with 4 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

arch/powerpc/mm/hugepage-hash64.c

View file