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kernel/sys.c: compat sysinfo syscall: fix undefined behavior

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Fix undefined behavior and compiler warning by replacing right shift 32
with upper_32_bits macro

Signed-off-by: Scotty Bauer <sbauer@eng.utah.edu>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Scotty Bauer 2014-10-09 15:30:26 -07:00 committed by Linus Torvalds
parent ec94fc3d59
commit 0baae41ea8
1 changed files with 1 additions and 1 deletions
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2
kernel/sys.c
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@ -2330,7 +2330,7 @@ COMPAT_SYSCALL_DEFINE1(sysinfo, struct compat_sysinfo __user *, info)
/* Check to see if any memory value is too large for 32-bit and scale
* down if needed
*/
if ((s.totalram >> 32) || (s.totalswap >> 32)) {
if (upper_32_bits(s.totalram) || upper_32_bits(s.totalswap)) {
int bitcount = 0;
while (s.mem_unit < PAGE_SIZE) {