aboutsummaryrefslogtreecommitdiff
path: root/include/linux
diff options
context:
space:
mode:
authorMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 16:01:57 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 16:01:46 +0200
commit6c210482ae4a9a5bb9377ad250feaacec3faa3cd (patch)
tree2eb89d89a22380298d64edad59010c1d0a59e5a4 /include/linux
parent2fc2d1e9ffcde78af7ab63ed640d9a4901797de2 (diff)
[S390] split page_test_and_clear_dirty.
The page_test_and_clear_dirty primitive really consists of two operations, page_test_dirty and the page_clear_dirty. The combination of the two is not an atomic operation, so it makes more sense to have two separate operations instead of one. In addition to the improved readability of the s390 version of SetPageUptodate, it now avoids the page_test_dirty operation which is an insert-storage-key-extended (iske) instruction which is an expensive operation. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/page-flags.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 9cd0d0eaf52..96326594e55 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -133,7 +133,7 @@
static inline void SetPageUptodate(struct page *page)
{
if (!test_and_set_bit(PG_uptodate, &page->flags))
- page_test_and_clear_dirty(page);
+ page_clear_dirty(page);
}
#else
#define SetPageUptodate(page) set_bit(PG_uptodate, &(page)->flags)