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UBIFS: avoid unnecessary checks

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I have a habit of compiling kernel with
EXTRA_CFLAGS="-Wextra -Wno-unused -Wno-sign-compare -Wno-missing-field-initializers"
and so fs/ubifs/key.h give lots (~10) of these every time:

CC      fs/ubifs/tnc_misc.o
In file included from fs/ubifs/ubifs.h:1725,
from fs/ubifs/tnc_misc.c:30:
fs/ubifs/key.h: In function 'key_r5_hash':
fs/ubifs/key.h:64: warning: comparison of unsigned expression >= 0 is always true
fs/ubifs/key.h: In function 'key_test_hash':
fs/ubifs/key.h:81: warning: comparison of unsigned expression >= 0 is always true

This patch fixes the warnings.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Kukkonen Mika 2008-12-02 11:32:49 +02:00 committed by Artem Bityutskiy
parent 553dea4dd5
commit 5dd7cbc083
1 changed files with 18 additions and 14 deletions
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32
fs/ubifs/key.h
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@ -37,6 +37,22 @@
#ifndef __UBIFS_KEY_H__
#define __UBIFS_KEY_H__
/**
* key_mask_hash - mask a valid hash value.
* @val: value to be masked
*
* We use hash values as offset in directories, so values %0 and %1 are
* reserved for "." and "..". %2 is reserved for "end of readdir" marker. This
* function makes sure the reserved values are not used.
*/
static inline uint32_t key_mask_hash(uint32_t hash)
{
hash &= UBIFS_S_KEY_HASH_MASK;
if (unlikely(hash <= 2))
hash += 3;
return hash;
}
/**
* key_r5_hash - R5 hash function (borrowed from reiserfs).
* @s: direntry name
@ -54,16 +70,7 @@ static inline uint32_t key_r5_hash(const char *s, int len)
str++;
}
a &= UBIFS_S_KEY_HASH_MASK;
/*
* We use hash values as offset in directories, so values %0 and %1 are
* reserved for "." and "..". %2 is reserved for "end of readdir"
* marker.
*/
if (unlikely(a >= 0 && a <= 2))
a += 3;
return a;
return key_mask_hash(a);
}
/**
@ -77,10 +84,7 @@ static inline uint32_t key_test_hash(const char *str, int len)
len = min_t(uint32_t, len, 4);
memcpy(&a, str, len);
a &= UBIFS_S_KEY_HASH_MASK;
if (unlikely(a >= 0 && a <= 2))
a += 3;
return a;
return key_mask_hash(a);
}
/**