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Subject[tip:x86/hash] x86, hash: Simplify switch, add __init annotation
Commit-ID:  d31abcbca0e076f2a136d214f409b55bf149fade
Gitweb: http://git.kernel.org/tip/d31abcbca0e076f2a136d214f409b55bf149fade
Author: Jan Beulich <JBeulich@suse.com>
AuthorDate: Thu, 27 Feb 2014 08:47:58 +0000
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Wed, 19 Mar 2014 16:26:44 -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@suse.com>
Link: http://lkml.kernel.org/r/530F09CE020000780011FBEF@nat28.tlf.novell.com
Cc: Francesco Fusco <ffusco@redhat.com>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Thomas Graf <tgraf@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
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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