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Commit 76e8d7cb authored by Al Viro's avatar Al Viro
Browse files

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: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 222e4ade

fs/jfs/jfs_logmgr.c

+4 −5
Original line number Diff line number Diff line
@@ -1835,17 +1835,16 @@ static int lbmLogInit(struct jfs_log * log) 
	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 */