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-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/include/asm/Kbuild1
-rw-r--r--arch/mips/include/asm/spinlock.h216
-rw-r--r--arch/mips/include/asm/spinlock_types.h10
4 files changed, 4 insertions, 224 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 9891a1285f25..7c2a64b32179 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -11,6 +11,7 @@ config MIPS
select ARCH_SUPPORTS_UPROBES
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
+ select ARCH_USE_QUEUED_RWLOCKS
select ARCH_WANT_IPC_PARSE_VERSION
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild
index 2535c7b4c482..ae6cb47e9d22 100644
--- a/arch/mips/include/asm/Kbuild
+++ b/arch/mips/include/asm/Kbuild
@@ -12,6 +12,7 @@ generic-y += mm-arch-hooks.h
generic-y += parport.h
generic-y += percpu.h
generic-y += preempt.h
+generic-y += qrwlock.h
generic-y += sections.h
generic-y += segment.h
generic-y += serial.h
diff --git a/arch/mips/include/asm/spinlock.h b/arch/mips/include/asm/spinlock.h
index a8df44d60607..3e7afff196cd 100644
--- a/arch/mips/include/asm/spinlock.h
+++ b/arch/mips/include/asm/spinlock.h
@@ -13,6 +13,7 @@
#include <asm/barrier.h>
#include <asm/processor.h>
+#include <asm/qrwlock.h>
#include <asm/compiler.h>
#include <asm/war.h>
@@ -220,221 +221,6 @@ static inline unsigned int arch_spin_trylock(arch_spinlock_t *lock)
return tmp;
}
-/*
- * Read-write spinlocks, allowing multiple readers but only one writer.
- *
- * NOTE! it is quite common to have readers in interrupts but no interrupt
- * writers. For those circumstances we can "mix" irq-safe locks - any writer
- * needs to get a irq-safe write-lock, but readers can get non-irqsafe
- * read-locks.
- */
-
-/*
- * read_can_lock - would read_trylock() succeed?
- * @lock: the rwlock in question.
- */
-#define arch_read_can_lock(rw) ((rw)->lock >= 0)
-
-/*
- * write_can_lock - would write_trylock() succeed?
- * @lock: the rwlock in question.
- */
-#define arch_write_can_lock(rw) (!(rw)->lock)
-
-static inline void arch_read_lock(arch_rwlock_t *rw)
-{
- unsigned int tmp;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # arch_read_lock \n"
- "1: ll %1, %2 \n"
- " bltz %1, 1b \n"
- " addu %1, 1 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " nop \n"
- " .set reorder \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } else {
- do {
- __asm__ __volatile__(
- "1: ll %1, %2 # arch_read_lock \n"
- " bltz %1, 1b \n"
- " addu %1, 1 \n"
- "2: sc %1, %0 \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } while (unlikely(!tmp));
- }
-
- smp_llsc_mb();
-}
-
-static inline void arch_read_unlock(arch_rwlock_t *rw)
-{
- unsigned int tmp;
-
- smp_mb__before_llsc();
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- "1: ll %1, %2 # arch_read_unlock \n"
- " addiu %1, -1 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } else {
- do {
- __asm__ __volatile__(
- "1: ll %1, %2 # arch_read_unlock \n"
- " addiu %1, -1 \n"
- " sc %1, %0 \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } while (unlikely(!tmp));
- }
-}
-
-static inline void arch_write_lock(arch_rwlock_t *rw)
-{
- unsigned int tmp;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # arch_write_lock \n"
- "1: ll %1, %2 \n"
- " bnez %1, 1b \n"
- " lui %1, 0x8000 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " nop \n"
- " .set reorder \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } else {
- do {
- __asm__ __volatile__(
- "1: ll %1, %2 # arch_write_lock \n"
- " bnez %1, 1b \n"
- " lui %1, 0x8000 \n"
- "2: sc %1, %0 \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } while (unlikely(!tmp));
- }
-
- smp_llsc_mb();
-}
-
-static inline void arch_write_unlock(arch_rwlock_t *rw)
-{
- smp_mb__before_llsc();
-
- __asm__ __volatile__(
- " # arch_write_unlock \n"
- " sw $0, %0 \n"
- : "=m" (rw->lock)
- : "m" (rw->lock)
- : "memory");
-}
-
-static inline int arch_read_trylock(arch_rwlock_t *rw)
-{
- unsigned int tmp;
- int ret;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # arch_read_trylock \n"
- " li %2, 0 \n"
- "1: ll %1, %3 \n"
- " bltz %1, 2f \n"
- " addu %1, 1 \n"
- " sc %1, %0 \n"
- " .set reorder \n"
- " beqzl %1, 1b \n"
- " nop \n"
- __WEAK_LLSC_MB
- " li %2, 1 \n"
- "2: \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp), "=&r" (ret)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } else {
- __asm__ __volatile__(
- " .set noreorder # arch_read_trylock \n"
- " li %2, 0 \n"
- "1: ll %1, %3 \n"
- " bltz %1, 2f \n"
- " addu %1, 1 \n"
- " sc %1, %0 \n"
- " beqz %1, 1b \n"
- " nop \n"
- " .set reorder \n"
- __WEAK_LLSC_MB
- " li %2, 1 \n"
- "2: .insn \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp), "=&r" (ret)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- }
-
- return ret;
-}
-
-static inline int arch_write_trylock(arch_rwlock_t *rw)
-{
- unsigned int tmp;
- int ret;
-
- if (R10000_LLSC_WAR) {
- __asm__ __volatile__(
- " .set noreorder # arch_write_trylock \n"
- " li %2, 0 \n"
- "1: ll %1, %3 \n"
- " bnez %1, 2f \n"
- " lui %1, 0x8000 \n"
- " sc %1, %0 \n"
- " beqzl %1, 1b \n"
- " nop \n"
- __WEAK_LLSC_MB
- " li %2, 1 \n"
- " .set reorder \n"
- "2: \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp), "=&r" (ret)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } else {
- do {
- __asm__ __volatile__(
- " ll %1, %3 # arch_write_trylock \n"
- " li %2, 0 \n"
- " bnez %1, 2f \n"
- " lui %1, 0x8000 \n"
- " sc %1, %0 \n"
- " li %2, 1 \n"
- "2: .insn \n"
- : "=" GCC_OFF_SMALL_ASM() (rw->lock), "=&r" (tmp),
- "=&r" (ret)
- : GCC_OFF_SMALL_ASM() (rw->lock)
- : "memory");
- } while (unlikely(!tmp));
-
- smp_llsc_mb();
- }
-
- return ret;
-}
-
#define arch_read_lock_flags(lock, flags) arch_read_lock(lock)
#define arch_write_lock_flags(lock, flags) arch_write_lock(lock)
diff --git a/arch/mips/include/asm/spinlock_types.h b/arch/mips/include/asm/spinlock_types.h
index 9b2528e612c0..3d38bfad9b49 100644
--- a/arch/mips/include/asm/spinlock_types.h
+++ b/arch/mips/include/asm/spinlock_types.h
@@ -1,10 +1,6 @@
#ifndef _ASM_SPINLOCK_TYPES_H
#define _ASM_SPINLOCK_TYPES_H
-#ifndef __LINUX_SPINLOCK_TYPES_H
-# error "please don't include this file directly"
-#endif
-
#include <linux/types.h>
#include <asm/byteorder.h>
@@ -28,10 +24,6 @@ typedef union {
#define __ARCH_SPIN_LOCK_UNLOCKED { .lock = 0 }
-typedef struct {
- volatile unsigned int lock;
-} arch_rwlock_t;
-
-#define __ARCH_RW_LOCK_UNLOCKED { 0 }
+#include <asm-generic/qrwlock_types.h>
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 02:45:55 +0100