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x86, UML: remove x86-specific implementations of find_first_bit

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x86 has been switched to the generic versions of find_first_bit
and find_first_zero_bit, but the original versions were retained.
This patch just removes the now unused x86-specific versions.

also update UML.

Signed-off-by: Alexander van Heukelum <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Alexander van Heukelum 2008-04-01 17:47:57 +02:00 • committed by Ingo Molnar
commit 5245698f66
8 changed files with 10 additions and 193 deletions
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58
include/asm-x86/bitops_32.h
View file

@ -4,64 +4,6 @@
/*
* Copyright 1992, Linus Torvalds.
*/
#ifndef CONFIG_GENERIC_FIND_FIRST_BIT
/**
* find_first_zero_bit - find the first zero bit in a memory region
* @addr: The address to start the search at
* @size: The maximum size to search
*
* Returns the bit number of the first zero bit, not the number of the byte
* containing a bit.
*/
static inline int find_first_zero_bit(const unsigned long *addr, unsigned size)
{
int d0, d1, d2;
int res;
if (!size)
return 0;
/* This looks at memory.
* Mark it volatile to tell gcc not to move it around
*/
asm volatile("movl $-1,%%eax\n\t"
"xorl %%edx,%%edx\n\t"
"repe; scasl\n\t"
"je 1f\n\t"
"xorl -4(%%edi),%%eax\n\t"
"subl $4,%%edi\n\t"
"bsfl %%eax,%%edx\n"
"1:\tsubl %%ebx,%%edi\n\t"
"shll $3,%%edi\n\t"
"addl %%edi,%%edx"
: "=d" (res), "=&c" (d0), "=&D" (d1), "=&a" (d2)
: "1" ((size + 31) >> 5), "2" (addr),
"b" (addr) : "memory");
return res;
}
/**
* find_first_bit - find the first set bit in a memory region
* @addr: The address to start the search at
* @size: The maximum size to search
*
* Returns the bit number of the first set bit, not the number of the byte
* containing a bit.
*/
static inline unsigned find_first_bit(const unsigned long *addr, unsigned size)
{
unsigned x = 0;
while (x < size) {
unsigned long val = *addr++;
if (val)
return __ffs(val) + x;
x += sizeof(*addr) << 3;
}
return x;
}
#endif
#ifdef __KERNEL__
#include <asm-generic/bitops/sched.h>

23
include/asm-x86/bitops_64.h
View file

@ -4,29 +4,6 @@
/*
* Copyright 1992, Linus Torvalds.
*/
#ifndef CONFIG_GENERIC_FIND_FIRST_BIT
extern long find_first_zero_bit(const unsigned long *addr, unsigned long size);
extern long find_first_bit(const unsigned long *addr, unsigned long size);
/* return index of first bet set in val or max when no bit is set */
static inline long __scanbit(unsigned long val, unsigned long max)
{
asm("bsfq %1,%0 ; cmovz %2,%0" : "=&r" (val) : "r" (val), "r" (max));
return val;
}
#define find_first_bit(addr, size) \
((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG \
? (__scanbit(*(unsigned long *)(addr), (size))) \
: find_first_bit((addr), (size))))
#define find_first_zero_bit(addr, size) \
((__builtin_constant_p((size)) && (size) <= BITS_PER_LONG \
? (__scanbit(~*(unsigned long *)(addr), (size))) \
: find_first_zero_bit((addr), (size))))
#endif
static inline void set_bit_string(unsigned long *bitmap, unsigned long i,
int len)
{