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>
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@ -1835,17 +1835,16 @@ static int lbmLogInit(struct jfs_log * log)
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for (i = 0; i < LOGPAGES;) {
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char *buffer;
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uint offset;
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struct page *page;
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struct page *page = alloc_page(GFP_KERNEL | __GFP_ZERO);
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buffer = (char *) get_zeroed_page(GFP_KERNEL);
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if (buffer == NULL)
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if (!page)
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goto error;
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page = virt_to_page(buffer);
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buffer = page_address(page);
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for (offset = 0; offset < PAGE_SIZE; offset += LOGPSIZE) {
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lbuf = kmalloc(sizeof(struct lbuf), GFP_KERNEL);
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if (lbuf == NULL) {
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if (offset == 0)
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free_page((unsigned long) buffer);
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__free_page(page);
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goto error;
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}
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if (offset) /* we already have one reference */
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