Commit 69ea6405 authored by Paul Mackerras's avatar Paul Mackerras Committed by Linus Torvalds

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: default avatarPaul Mackerras <paulus@samba.org>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 1e2aec87
...@@ -8,7 +8,7 @@ ...@@ -8,7 +8,7 @@
#ifdef __LITTLE_ENDIAN #ifdef __LITTLE_ENDIAN
# define aligned_byte_mask(n) ((1ul << 8*(n))-1) # define aligned_byte_mask(n) ((1ul << 8*(n))-1)
#else #else
# define aligned_byte_mask(n) (~0xfful << 8*(7-(n))) # define aligned_byte_mask(n) (~0xfful << (BITS_PER_LONG - 8 - 8*(n)))
#endif #endif
/* /*
......
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