From: Jan Kara <jack@xxxxxxx> Subject: mm: use find_get_pages_range() in filemap_range_has_page() We want only pages from given range in filemap_range_has_page(), furthermore we want at most a single page. So use find_get_pages_range() instead of pagevec_lookup() and remove unnecessary code. Link: http://lkml.kernel.org/r/20170726114704.7626-10-jack@xxxxxxx Signed-off-by: Jan Kara <jack@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/filemap.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff -puN mm/filemap.c~mm-use-find_get_pages_range-in-filemap_range_has_page mm/filemap.c --- a/mm/filemap.c~mm-use-find_get_pages_range-in-filemap_range_has_page +++ a/mm/filemap.c @@ -393,8 +393,7 @@ bool filemap_range_has_page(struct addre { pgoff_t index = start_byte >> PAGE_SHIFT; pgoff_t end = end_byte >> PAGE_SHIFT; - struct pagevec pvec; - bool ret; + struct page *page; if (end_byte < start_byte) return false; @@ -402,12 +401,10 @@ bool filemap_range_has_page(struct addre if (mapping->nrpages == 0) return false; - pagevec_init(&pvec, 0); - if (!pagevec_lookup(&pvec, mapping, &index, 1)) + if (!find_get_pages_range(mapping, &index, end, 1, &page)) return false; - ret = (pvec.pages[0]->index <= end); - pagevec_release(&pvec); - return ret; + put_page(page); + return true; } EXPORT_SYMBOL(filemap_range_has_page); _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
