From: Peter Williams <pwil3058@bigpond.net.au>

The implementation of int_sqrt() assumes that longs have 32 bits.  On
systems that have 64 bit longs this will result in gross errors when the
argument to the function is greater than 2^32 - 1 on such systems.  I doubt
whether any such use is currently made of int_sqrt() but the attached patch
fixes the problem anyway.

Signed-off-by: Peter Williams <pwil3058@bigpond.com.au>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 lib/int_sqrt.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN lib/int_sqrt.c~lib-fix-bug-in-int_sqrt-for-64-bit-longs lib/int_sqrt.c
--- 25/lib/int_sqrt.c~lib-fix-bug-in-int_sqrt-for-64-bit-longs	Tue Jan 24 13:50:33 2006
+++ 25-akpm/lib/int_sqrt.c	Tue Jan 24 13:50:33 2006
@@ -15,7 +15,7 @@ unsigned long int_sqrt(unsigned long x)
 	op = x;
 	res = 0;
 
-	one = 1 << 30;
+	one = 1UL << (BITS_PER_LONG - 2);
 	while (one > op)
 		one >>= 2;
 
_