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mm/zsmalloc: fix comment in zsmalloc

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The class index and fullness group are not encoded in
(first)page->mapping any more, after commit 3783689a1a ("zsmalloc:
introduce zspage structure").  Instead, they are store in struct zspage.

Just delete this unneeded comment.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Yisheng Xie <[email protected]>
Suggested-by: Sergey Senozhatsky <[email protected]>
Reviewed-by: Sergey Senozhatsky <[email protected]>
Acked-by: Minchan Kim <[email protected]>
Cc: Nitin Gupta <[email protected]>
Cc: Hanjun Guo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Yisheng Xie 2017-02-24 14:59:48 -08:00 • committed by Linus Torvalds
commit b538e422e4
1 changed files with 0 additions and 4 deletions
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4
mm/zsmalloc.c
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@ -267,10 +267,6 @@ struct zs_pool {
#endif
};
/*
* A zspage's class index and fullness group
* are encoded in its (first)page->mapping
*/
#define FULLNESS_BITS 2
#define CLASS_BITS 8
#define ISOLATED_BITS 3