locking/rwlock, x86: Delete unused asm/rwlock.h and rwlock.S

#ifndef _ASM_X86_RWLOCK_H

#define _ASM_X86_RWLOCK_H

#include <asm/asm.h>

#if CONFIG_NR_CPUS <= 2048

#ifndef __ASSEMBLY__

typedef union {

	s32 lock;

	s32 write;

} arch_rwlock_t;

#endif

#define RW_LOCK_BIAS		0x00100000

#define READ_LOCK_SIZE(insn)	__ASM_FORM(insn##l)

#define READ_LOCK_ATOMIC(n)	atomic_##n

#define WRITE_LOCK_ADD(n)	__ASM_FORM_COMMA(addl n)

#define WRITE_LOCK_SUB(n)	__ASM_FORM_COMMA(subl n)

#define WRITE_LOCK_CMP		RW_LOCK_BIAS

#else /* CONFIG_NR_CPUS > 2048 */

#include <linux/const.h>

#ifndef __ASSEMBLY__

typedef union {

	s64 lock;

	struct {

		u32 read;

		s32 write;

	};

} arch_rwlock_t;

#endif

#define RW_LOCK_BIAS		(_AC(1,L) << 32)

#define READ_LOCK_SIZE(insn)	__ASM_FORM(insn##q)

#define READ_LOCK_ATOMIC(n)	atomic64_##n

#define WRITE_LOCK_ADD(n)	__ASM_FORM(incl)

#define WRITE_LOCK_SUB(n)	__ASM_FORM(decl)

#define WRITE_LOCK_CMP		1

#endif /* CONFIG_NR_CPUS */

#define __ARCH_RW_LOCK_UNLOCKED		{ RW_LOCK_BIAS }

/* Actual code is in asm/spinlock.h or in arch/x86/lib/rwlock.S */

#endif /* _ASM_X86_RWLOCK_H */

lib-y += thunk_$(BITS).o

lib-y += usercopy_$(BITS).o usercopy.o getuser.o putuser.o

lib-y += memcpy_$(BITS).o

lib-$(CONFIG_SMP) += rwlock.o

lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o

lib-$(CONFIG_INSTRUCTION_DECODER) += insn.o inat.o

/* Slow paths of read/write spinlocks. */

#include <linux/linkage.h>

#include <asm/alternative-asm.h>

#include <asm/frame.h>

#include <asm/rwlock.h>

#ifdef CONFIG_X86_32

# define __lock_ptr eax

#else

# define __lock_ptr rdi

#endif

ENTRY(__write_lock_failed)

	CFI_STARTPROC

	FRAME

0:	LOCK_PREFIX

	WRITE_LOCK_ADD($RW_LOCK_BIAS) (%__lock_ptr)

1:	rep; nop

	cmpl	$WRITE_LOCK_CMP, (%__lock_ptr)

	jne	1b

	LOCK_PREFIX

	WRITE_LOCK_SUB($RW_LOCK_BIAS) (%__lock_ptr)

	jnz	0b

	ENDFRAME

	ret

	CFI_ENDPROC

END(__write_lock_failed)

ENTRY(__read_lock_failed)

	CFI_STARTPROC

	FRAME

0:	LOCK_PREFIX

	READ_LOCK_SIZE(inc) (%__lock_ptr)

1:	rep; nop

	READ_LOCK_SIZE(cmp) $1, (%__lock_ptr)

	js	1b

	LOCK_PREFIX

	READ_LOCK_SIZE(dec) (%__lock_ptr)

	js	0b

	ENDFRAME

	ret

	CFI_ENDPROC

END(__read_lock_failed)