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Commit 745329c4 authored by Hans Rosenfeld's avatar Hans Rosenfeld Committed by Linus Torvalds
Browse files

/proc/pid/pagemap: fix PM_SPECIAL macro 



There seems to be a bug in the PM_SPECIAL macro for /proc/pid/pagemap.  I
think masking out those other bits makes more sense then setting all those
mask bits.

Signed-off-by: default avatarHans Rosenfeld <Hans.Rosenfeld@amd.com>
Acked-by: default avatarMatt Mackall <mpm@selenic.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8936b6db

fs/proc/task_mmu.c

+1 −1
Original line number Diff line number Diff line
@@ -531,7 +531,7 @@ struct pagemapread { 
#define PM_RESERVED_BITS    3

#define PM_RESERVED_OFFSET  (64 - PM_RESERVED_BITS)

#define PM_RESERVED_MASK    (((1LL<<PM_RESERVED_BITS)-1) << PM_RESERVED_OFFSET)

#define PM_SPECIAL(nr)      (((nr) << PM_RESERVED_OFFSET) | PM_RESERVED_MASK)

#define PM_SPECIAL(nr)      (((nr) << PM_RESERVED_OFFSET) & PM_RESERVED_MASK)

#define PM_NOT_PRESENT      PM_SPECIAL(1LL)

#define PM_SWAP             PM_SPECIAL(2LL)

#define PM_END_OF_BUFFER    1