jfs: microoptimize get_zeroed_page / virt_to_page
get_zeroed_page does alloc_page and returns page_address of the result;
subsequent virt_to_page will recover the page, but since the caller
needs both page and its page_address() anyway, why bother going through
that wrapper at all?
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index a69bdf2..a270cb7 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1835,17 +1835,16 @@
for (i = 0; i < LOGPAGES;) {
char *buffer;
uint offset;
- struct page *page;
+ struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- buffer = (char *) get_zeroed_page(GFP_KERNEL);
- if (buffer == NULL)
+ if (!page)
goto error;
- page = virt_to_page(buffer);
+ buffer = page_address(page);
for (offset = 0; offset < PAGE_SIZE; offset += LOGPSIZE) {
lbuf = kmalloc(sizeof(struct lbuf), GFP_KERNEL);
if (lbuf == NULL) {
if (offset == 0)
- free_page((unsigned long) buffer);
+ __free_page(page);
goto error;
}
if (offset) /* we already have one reference */