Commit 69ea6405 authored May 28, 2012 by Paul Mackerras Committed by Linus Torvalds May 27, 2012

lib: Fix generic strnlen_user for 32-bit big-endian machines



The aligned_byte_mask() definition is wrong for 32-bit big-endian
machines: the "7-(n)" part of the definition assumes a long is 8
bytes.  This fixes it by using BITS_PER_LONG - 8 instead of 8*7.
Tested on 32-bit and 64-bit PowerPC.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 1e2aec87

lib/strnlen_user.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -8,7 +8,7 @@
		#ifdef __LITTLE_ENDIAN
		# define aligned_byte_mask(n) ((1ul << 8*(n))-1)
		#else
		# define aligned_byte_mask(n) (~0xfful << 8*(7-(n)))
		# define aligned_byte_mask(n) (~0xfful << (BITS_PER_LONG - 8 - 8*(n)))
		#endif

		/*

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