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mm/page_alloc.c: fix comment in __get_free_pages() 

__get_free_pages() will return a virtual address, but it is not just a
32-bit address, for example on a 64-bit system.  And this comment really
confuses new readers of mm.

Link: http://lkml.kernel.org/r/1511780964-64864-1-git-send-email-chenjiankang1@huawei.com
Signed-off-by: Jiankang Chen <chenjiankang1@huawei.com>
Reported-by: Hanjun Guo <guohanjun@huawei.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Yisheng Xie <xieyisheng1@huawei.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiankang Chen 2018-01-31 16:16:52 -08:00 committed by Linus Torvalds
parent 8e33771ca4
commit 48128397b0
1 changed files with 1 additions and 1 deletions
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mm/page_alloc.c
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@ -4278,7 +4278,7 @@ unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order)
struct page *page;
/*
* __get_free_pages() returns a 32-bit address, which cannot represent
* __get_free_pages() returns a virtual address, which cannot represent
* a highmem page
*/
VM_BUG_ON((gfp_mask & __GFP_HIGHMEM) != 0);