From 3f56a2f8030071cf86520ef4fc3045ba6856e610 Mon Sep 17 00:00:00 2001 From: Miles Chen Date: Wed, 31 Jan 2018 16:21:27 -0800 Subject: [PATCH] mm: remove PG_highmem description Commit cbe37d093707 ("[PATCH] mm: remove PG_highmem") removed PG_highmem to save a page flag. So the description of PG_highmem is no longer needed. Link: http://lkml.kernel.org/r/1517391212-2950-1-git-send-email-miles.chen@mediatek.com Signed-off-by: Miles Chen Acked-by: Michal Hocko Reviewed-by: Andrew Morton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/page-flags.h | 5 ----- 1 file changed, 5 deletions(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index 3ec44e2..50c2b87 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -46,11 +46,6 @@ * guarantees that this bit is cleared for a page when it first is entered into * the page cache. * - * PG_highmem pages are not permanently mapped into the kernel virtual address - * space, they need to be kmapped separately for doing IO on the pages. The - * struct page (these bits with information) are always mapped into kernel - * address space... - * * PG_hwpoison indicates that a page got corrupted in hardware and contains * data with incorrect ECC bits that triggered a machine check. Accessing is * not safe since it may cause another machine check. Don't touch! -- 2.7.4