[tip:x86/hash] x86, hash: Simplify switch, add __init annotation

[tip-bot for Jan Beulich]

Commit-ID:  7a5917e9787dd73284f04e35c3cfdb39a67bf0d5
Gitweb:     http://git.kernel.org/tip/7a5917e9787dd73284f04e35c3cfdb39a67bf0d5
Author:     Jan Beulich <JBeulich@xxxxxxxx>
AuthorDate: Thu, 27 Feb 2014 08:47:58 +0000
Committer:  H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Wed, 19 Mar 2014 16:51:04 -0700

x86, hash: Simplify switch, add __init annotation

Minor cleanups:

- simplify switch statement
- add __init annotation to setup_arch_fast_hash()

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Link: http://lkml.kernel.org/r/530F09CE020000780011FBEF@xxxxxxxxxxxxxxxxxxxx
Cc: Francesco Fusco <ffusco@xxxxxxxxxx>
Cc: Thomas Graf <tgraf@xxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Acked-by: Daniel Borkmann <dborkman@xxxxxxxxxx>
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
 arch/x86/lib/hash.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/lib/hash.c b/arch/x86/lib/hash.c
index ac628aa..ff4fa51 100644
--- a/arch/x86/lib/hash.c
+++ b/arch/x86/lib/hash.c
@@ -32,6 +32,7 @@
  */
 
 #include <linux/hash.h>
+#include <linux/init.h>
 
 #include <asm/processor.h>
 #include <asm/cpufeature.h>
@@ -55,17 +56,16 @@ static u32 intel_crc4_2_hash(const void *data, u32 len, u32 seed)
 	for (i = 0; i < len / 4; i++)
 		seed = crc32_u32(seed, *p32++);
 
-	switch (3 - (len & 0x03)) {
-	case 0:
+	switch (len & 3) {
+	case 3:
 		tmp |= *((const u8 *) p32 + 2) << 16;
 		/* fallthrough */
-	case 1:
+	case 2:
 		tmp |= *((const u8 *) p32 + 1) << 8;
 		/* fallthrough */
-	case 2:
+	case 1:
 		tmp |= *((const u8 *) p32);
 		seed = crc32_u32(seed, tmp);
-	default:
 		break;
 	}
 
@@ -83,7 +83,7 @@ static u32 intel_crc4_2_hash2(const u32 *data, u32 len, u32 seed)
 	return seed;
 }
 
-void setup_arch_fast_hash(struct fast_hash_ops *ops)
+void __init setup_arch_fast_hash(struct fast_hash_ops *ops)
 {
 	if (cpu_has_xmm4_2) {
 		ops->hash  = intel_crc4_2_hash;
--
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