From: Mike Galbraith <efault@gmx.de>
Date: Mon, 9 Jul 2007 16:52:00 +0000 (+0200)
Subject: sched: simplify sched_find_first_bit()
X-Git-Tag: v2.6.23-rc1~1234
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff80a77f20f811c0cc5b251d0f657cbc6f788385;p=linux-2.6

sched: simplify sched_find_first_bit()

simplify sched_rt.c's sched_find_first_bit() function: there are
only 100 RT priority levels left.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/include/asm-generic/bitops/sched.h b/include/asm-generic/bitops/sched.h
index 815bb01480..604fab7031 100644
--- a/include/asm-generic/bitops/sched.h
+++ b/include/asm-generic/bitops/sched.h
@@ -6,28 +6,23 @@
 
 /*
  * Every architecture must define this function. It's the fastest
- * way of searching a 140-bit bitmap where the first 100 bits are
- * unlikely to be set. It's guaranteed that at least one of the 140
- * bits is cleared.
+ * way of searching a 100-bit bitmap.  It's guaranteed that at least
+ * one of the 100 bits is cleared.
  */
 static inline int sched_find_first_bit(const unsigned long *b)
 {
 #if BITS_PER_LONG == 64
-	if (unlikely(b[0]))
+	if (b[0])
 		return __ffs(b[0]);
-	if (likely(b[1]))
-		return __ffs(b[1]) + 64;
-	return __ffs(b[2]) + 128;
+	return __ffs(b[1]) + 64;
 #elif BITS_PER_LONG == 32
-	if (unlikely(b[0]))
+	if (b[0])
 		return __ffs(b[0]);
-	if (unlikely(b[1]))
+	if (b[1])
 		return __ffs(b[1]) + 32;
-	if (unlikely(b[2]))
+	if (b[2])
 		return __ffs(b[2]) + 64;
-	if (b[3])
-		return __ffs(b[3]) + 96;
-	return __ffs(b[4]) + 128;
+	return __ffs(b[3]) + 96;
 #else
 #error BITS_PER_LONG not defined
 #endif