x86: fix off-by-one in find_next_zero_string

patch 801916c1b369b637ce799e6c71a94963ff63df79 in mainline.

x86: fix off-by-one in find_next_zero_string

Fix an off-by-one error in find_next_zero_string which prevents
allocating the last bit.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Andrew Hastings <abh@cray.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/arch/x86_64/lib/bitstr.c b/arch/x86_64/lib/bitstr.c
index 24676609a6acbcf12ac2c29a3949b6f21abe199c..7445caf1b5ded2f12f8bd4ae01ed7d51917627d6 100644 (file)
--- a/arch/x86_64/lib/bitstr.c
+++ b/arch/x86_64/lib/bitstr.c
@@ -14,7 +14,7 @@ find_next_zero_string(unsigned long *bitmap, long start, long nbits, int len)
        
        /* could test bitsliced, but it's hardly worth it */
        end = n+len;
-       if (end >= nbits) 
+       if (end > nbits)
                return -1; 
        for (i = n+1; i < end; i++) { 
                if (test_bit(i, bitmap)) {