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Message-ID: <168475124523.404.8215708224445186332.tip-bot2@tip-bot2>
Date: Mon, 22 May 2023 10:27:25 -0000
From: "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Peter Zijlstra (Intel)" <peterz@...radead.org>,
Arnd Bergmann <arnd@...db.de>,
Heiko Carstens <hca@...ux.ibm.com>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: locking/core] arch: Remove cmpxchg_double
The following commit has been merged into the locking/core branch of tip:
Commit-ID: b4cf83b2d1da40b253eeb0b8122e20b89b7dd4e7
Gitweb: https://git.kernel.org/tip/b4cf83b2d1da40b253eeb0b8122e20b89b7dd4e7
Author: Peter Zijlstra <peterz@...radead.org>
AuthorDate: Mon, 15 May 2023 09:57:09 +02:00
Committer: Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 22 May 2023 10:49:50 +02:00
arch: Remove cmpxchg_double
No moar users, remove the monster.
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Acked-by: Heiko Carstens <hca@...ux.ibm.com>
Link: https://lore.kernel.org/r/20230515080554.589824283@infradead.org
---
Documentation/core-api/this_cpu_ops.rst | 2 +-
arch/arm64/include/asm/atomic_ll_sc.h | 33 +------------
arch/arm64/include/asm/atomic_lse.h | 36 +-------------
arch/arm64/include/asm/cmpxchg.h | 46 +-----------------
arch/arm64/include/asm/percpu.h | 10 +----
arch/s390/include/asm/cmpxchg.h | 34 +------------
arch/s390/include/asm/percpu.h | 18 +-------
arch/x86/include/asm/cmpxchg.h | 25 +---------
arch/x86/include/asm/cmpxchg_32.h | 1 +-
arch/x86/include/asm/cmpxchg_64.h | 1 +-
arch/x86/include/asm/percpu.h | 41 +---------------
include/asm-generic/percpu.h | 58 +---------------------
include/linux/atomic/atomic-instrumented.h | 17 +------
include/linux/percpu-defs.h | 38 +--------------
scripts/atomic/gen-atomic-instrumented.sh | 15 +----
15 files changed, 5 insertions(+), 370 deletions(-)
diff --git a/Documentation/core-api/this_cpu_ops.rst b/Documentation/core-api/this_cpu_ops.rst
index 5cb8b88..91acbcf 100644
--- a/Documentation/core-api/this_cpu_ops.rst
+++ b/Documentation/core-api/this_cpu_ops.rst
@@ -53,7 +53,6 @@ preemption and interrupts::
this_cpu_add_return(pcp, val)
this_cpu_xchg(pcp, nval)
this_cpu_cmpxchg(pcp, oval, nval)
- this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
this_cpu_sub(pcp, val)
this_cpu_inc(pcp)
this_cpu_dec(pcp)
@@ -242,7 +241,6 @@ safe::
__this_cpu_add_return(pcp, val)
__this_cpu_xchg(pcp, nval)
__this_cpu_cmpxchg(pcp, oval, nval)
- __this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
__this_cpu_sub(pcp, val)
__this_cpu_inc(pcp)
__this_cpu_dec(pcp)
diff --git a/arch/arm64/include/asm/atomic_ll_sc.h b/arch/arm64/include/asm/atomic_ll_sc.h
index b100a49..89d2ba2 100644
--- a/arch/arm64/include/asm/atomic_ll_sc.h
+++ b/arch/arm64/include/asm/atomic_ll_sc.h
@@ -294,39 +294,6 @@ __CMPXCHG_CASE( , , mb_, 64, dmb ish, , l, "memory", L)
#undef __CMPXCHG_CASE
-#define __CMPXCHG_DBL(name, mb, rel, cl) \
-static __always_inline long \
-__ll_sc__cmpxchg_double##name(unsigned long old1, \
- unsigned long old2, \
- unsigned long new1, \
- unsigned long new2, \
- volatile void *ptr) \
-{ \
- unsigned long tmp, ret; \
- \
- asm volatile("// __cmpxchg_double" #name "\n" \
- " prfm pstl1strm, %2\n" \
- "1: ldxp %0, %1, %2\n" \
- " eor %0, %0, %3\n" \
- " eor %1, %1, %4\n" \
- " orr %1, %0, %1\n" \
- " cbnz %1, 2f\n" \
- " st" #rel "xp %w0, %5, %6, %2\n" \
- " cbnz %w0, 1b\n" \
- " " #mb "\n" \
- "2:" \
- : "=&r" (tmp), "=&r" (ret), "+Q" (*(__uint128_t *)ptr) \
- : "r" (old1), "r" (old2), "r" (new1), "r" (new2) \
- : cl); \
- \
- return ret; \
-}
-
-__CMPXCHG_DBL( , , , )
-__CMPXCHG_DBL(_mb, dmb ish, l, "memory")
-
-#undef __CMPXCHG_DBL
-
union __u128_halves {
u128 full;
struct {
diff --git a/arch/arm64/include/asm/atomic_lse.h b/arch/arm64/include/asm/atomic_lse.h
index c781281..87f568a 100644
--- a/arch/arm64/include/asm/atomic_lse.h
+++ b/arch/arm64/include/asm/atomic_lse.h
@@ -281,42 +281,6 @@ __CMPXCHG_CASE(x, , mb_, 64, al, "memory")
#undef __CMPXCHG_CASE
-#define __CMPXCHG_DBL(name, mb, cl...) \
-static __always_inline long \
-__lse__cmpxchg_double##name(unsigned long old1, \
- unsigned long old2, \
- unsigned long new1, \
- unsigned long new2, \
- volatile void *ptr) \
-{ \
- unsigned long oldval1 = old1; \
- unsigned long oldval2 = old2; \
- register unsigned long x0 asm ("x0") = old1; \
- register unsigned long x1 asm ("x1") = old2; \
- register unsigned long x2 asm ("x2") = new1; \
- register unsigned long x3 asm ("x3") = new2; \
- register unsigned long x4 asm ("x4") = (unsigned long)ptr; \
- \
- asm volatile( \
- __LSE_PREAMBLE \
- " casp" #mb "\t%[old1], %[old2], %[new1], %[new2], %[v]\n"\
- " eor %[old1], %[old1], %[oldval1]\n" \
- " eor %[old2], %[old2], %[oldval2]\n" \
- " orr %[old1], %[old1], %[old2]" \
- : [old1] "+&r" (x0), [old2] "+&r" (x1), \
- [v] "+Q" (*(__uint128_t *)ptr) \
- : [new1] "r" (x2), [new2] "r" (x3), [ptr] "r" (x4), \
- [oldval1] "r" (oldval1), [oldval2] "r" (oldval2) \
- : cl); \
- \
- return x0; \
-}
-
-__CMPXCHG_DBL( , )
-__CMPXCHG_DBL(_mb, al, "memory")
-
-#undef __CMPXCHG_DBL
-
#define __CMPXCHG128(name, mb, cl...) \
static __always_inline u128 \
__lse__cmpxchg128##name(volatile u128 *ptr, u128 old, u128 new) \
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h
index 097b832..d7a5407 100644
--- a/arch/arm64/include/asm/cmpxchg.h
+++ b/arch/arm64/include/asm/cmpxchg.h
@@ -130,22 +130,6 @@ __CMPXCHG_CASE(mb_, 64)
#undef __CMPXCHG_CASE
-#define __CMPXCHG_DBL(name) \
-static inline long __cmpxchg_double##name(unsigned long old1, \
- unsigned long old2, \
- unsigned long new1, \
- unsigned long new2, \
- volatile void *ptr) \
-{ \
- return __lse_ll_sc_body(_cmpxchg_double##name, \
- old1, old2, new1, new2, ptr); \
-}
-
-__CMPXCHG_DBL( )
-__CMPXCHG_DBL(_mb)
-
-#undef __CMPXCHG_DBL
-
#define __CMPXCHG128(name) \
static inline u128 __cmpxchg128##name(volatile u128 *ptr, \
u128 old, u128 new) \
@@ -211,36 +195,6 @@ __CMPXCHG_GEN(_mb)
#define arch_cmpxchg64 arch_cmpxchg
#define arch_cmpxchg64_local arch_cmpxchg_local
-/* cmpxchg_double */
-#define system_has_cmpxchg_double() 1
-
-#define __cmpxchg_double_check(ptr1, ptr2) \
-({ \
- if (sizeof(*(ptr1)) != 8) \
- BUILD_BUG(); \
- VM_BUG_ON((unsigned long *)(ptr2) - (unsigned long *)(ptr1) != 1); \
-})
-
-#define arch_cmpxchg_double(ptr1, ptr2, o1, o2, n1, n2) \
-({ \
- int __ret; \
- __cmpxchg_double_check(ptr1, ptr2); \
- __ret = !__cmpxchg_double_mb((unsigned long)(o1), (unsigned long)(o2), \
- (unsigned long)(n1), (unsigned long)(n2), \
- ptr1); \
- __ret; \
-})
-
-#define arch_cmpxchg_double_local(ptr1, ptr2, o1, o2, n1, n2) \
-({ \
- int __ret; \
- __cmpxchg_double_check(ptr1, ptr2); \
- __ret = !__cmpxchg_double((unsigned long)(o1), (unsigned long)(o2), \
- (unsigned long)(n1), (unsigned long)(n2), \
- ptr1); \
- __ret; \
-})
-
/* cmpxchg128 */
#define system_has_cmpxchg128() 1
diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h
index 2549829..9abcc8e 100644
--- a/arch/arm64/include/asm/percpu.h
+++ b/arch/arm64/include/asm/percpu.h
@@ -145,16 +145,6 @@ PERCPU_RET_OP(add, add, ldadd)
* preemption point when TIF_NEED_RESCHED gets set while preemption is
* disabled.
*/
-#define this_cpu_cmpxchg_double_8(ptr1, ptr2, o1, o2, n1, n2) \
-({ \
- int __ret; \
- preempt_disable_notrace(); \
- __ret = cmpxchg_double_local( raw_cpu_ptr(&(ptr1)), \
- raw_cpu_ptr(&(ptr2)), \
- o1, o2, n1, n2); \
- preempt_enable_notrace(); \
- __ret; \
-})
#define _pcp_protect(op, pcp, ...) \
({ \
diff --git a/arch/s390/include/asm/cmpxchg.h b/arch/s390/include/asm/cmpxchg.h
index 7517376..aae0315 100644
--- a/arch/s390/include/asm/cmpxchg.h
+++ b/arch/s390/include/asm/cmpxchg.h
@@ -190,40 +190,6 @@ static __always_inline unsigned long __cmpxchg(unsigned long address,
#define arch_cmpxchg_local arch_cmpxchg
#define arch_cmpxchg64_local arch_cmpxchg
-#define system_has_cmpxchg_double() 1
-
-static __always_inline int __cmpxchg_double(unsigned long p1, unsigned long p2,
- unsigned long o1, unsigned long o2,
- unsigned long n1, unsigned long n2)
-{
- union register_pair old = { .even = o1, .odd = o2, };
- union register_pair new = { .even = n1, .odd = n2, };
- int cc;
-
- asm volatile(
- " cdsg %[old],%[new],%[ptr]\n"
- " ipm %[cc]\n"
- " srl %[cc],28\n"
- : [cc] "=&d" (cc), [old] "+&d" (old.pair)
- : [new] "d" (new.pair),
- [ptr] "QS" (*(unsigned long *)p1), "Q" (*(unsigned long *)p2)
- : "memory", "cc");
- return !cc;
-}
-
-#define arch_cmpxchg_double(p1, p2, o1, o2, n1, n2) \
-({ \
- typeof(p1) __p1 = (p1); \
- typeof(p2) __p2 = (p2); \
- \
- BUILD_BUG_ON(sizeof(*(p1)) != sizeof(long)); \
- BUILD_BUG_ON(sizeof(*(p2)) != sizeof(long)); \
- VM_BUG_ON((unsigned long)((__p1) + 1) != (unsigned long)(__p2));\
- __cmpxchg_double((unsigned long)__p1, (unsigned long)__p2, \
- (unsigned long)(o1), (unsigned long)(o2), \
- (unsigned long)(n1), (unsigned long)(n2)); \
-})
-
#define system_has_cmpxchg128() 1
static __always_inline u128 arch_cmpxchg128(volatile u128 *ptr, u128 old, u128 new)
diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h
index 5603402..264095d 100644
--- a/arch/s390/include/asm/percpu.h
+++ b/arch/s390/include/asm/percpu.h
@@ -180,24 +180,6 @@
#define this_cpu_xchg_4(pcp, nval) arch_this_cpu_xchg(pcp, nval)
#define this_cpu_xchg_8(pcp, nval) arch_this_cpu_xchg(pcp, nval)
-#define arch_this_cpu_cmpxchg_double(pcp1, pcp2, o1, o2, n1, n2) \
-({ \
- typeof(pcp1) *p1__; \
- typeof(pcp2) *p2__; \
- int ret__; \
- \
- preempt_disable_notrace(); \
- p1__ = raw_cpu_ptr(&(pcp1)); \
- p2__ = raw_cpu_ptr(&(pcp2)); \
- ret__ = __cmpxchg_double((unsigned long)p1__, (unsigned long)p2__, \
- (unsigned long)(o1), (unsigned long)(o2), \
- (unsigned long)(n1), (unsigned long)(n2)); \
- preempt_enable_notrace(); \
- ret__; \
-})
-
-#define this_cpu_cmpxchg_double_8 arch_this_cpu_cmpxchg_double
-
#include <asm-generic/percpu.h>
#endif /* __ARCH_S390_PERCPU__ */
diff --git a/arch/x86/include/asm/cmpxchg.h b/arch/x86/include/asm/cmpxchg.h
index 540573f..d536365 100644
--- a/arch/x86/include/asm/cmpxchg.h
+++ b/arch/x86/include/asm/cmpxchg.h
@@ -239,29 +239,4 @@ extern void __add_wrong_size(void)
#define __xadd(ptr, inc, lock) __xchg_op((ptr), (inc), xadd, lock)
#define xadd(ptr, inc) __xadd((ptr), (inc), LOCK_PREFIX)
-#define __cmpxchg_double(pfx, p1, p2, o1, o2, n1, n2) \
-({ \
- bool __ret; \
- __typeof__(*(p1)) __old1 = (o1), __new1 = (n1); \
- __typeof__(*(p2)) __old2 = (o2), __new2 = (n2); \
- BUILD_BUG_ON(sizeof(*(p1)) != sizeof(long)); \
- BUILD_BUG_ON(sizeof(*(p2)) != sizeof(long)); \
- VM_BUG_ON((unsigned long)(p1) % (2 * sizeof(long))); \
- VM_BUG_ON((unsigned long)((p1) + 1) != (unsigned long)(p2)); \
- asm volatile(pfx "cmpxchg%c5b %1" \
- CC_SET(e) \
- : CC_OUT(e) (__ret), \
- "+m" (*(p1)), "+m" (*(p2)), \
- "+a" (__old1), "+d" (__old2) \
- : "i" (2 * sizeof(long)), \
- "b" (__new1), "c" (__new2)); \
- __ret; \
-})
-
-#define arch_cmpxchg_double(p1, p2, o1, o2, n1, n2) \
- __cmpxchg_double(LOCK_PREFIX, p1, p2, o1, o2, n1, n2)
-
-#define arch_cmpxchg_double_local(p1, p2, o1, o2, n1, n2) \
- __cmpxchg_double(, p1, p2, o1, o2, n1, n2)
-
#endif /* ASM_X86_CMPXCHG_H */
diff --git a/arch/x86/include/asm/cmpxchg_32.h b/arch/x86/include/asm/cmpxchg_32.h
index d12f9ed..b5731c5 100644
--- a/arch/x86/include/asm/cmpxchg_32.h
+++ b/arch/x86/include/asm/cmpxchg_32.h
@@ -103,7 +103,6 @@ static inline bool __try_cmpxchg64(volatile u64 *ptr, u64 *pold, u64 new)
#endif
-#define system_has_cmpxchg_double() boot_cpu_has(X86_FEATURE_CX8)
#define system_has_cmpxchg64() boot_cpu_has(X86_FEATURE_CX8)
#endif /* _ASM_X86_CMPXCHG_32_H */
diff --git a/arch/x86/include/asm/cmpxchg_64.h b/arch/x86/include/asm/cmpxchg_64.h
index fe29107..3e6e3ee 100644
--- a/arch/x86/include/asm/cmpxchg_64.h
+++ b/arch/x86/include/asm/cmpxchg_64.h
@@ -81,7 +81,6 @@ static __always_inline bool arch_try_cmpxchg128_local(volatile u128 *ptr, u128 *
return __arch_try_cmpxchg128(ptr, oldp, new,);
}
-#define system_has_cmpxchg_double() boot_cpu_has(X86_FEATURE_CX16)
#define system_has_cmpxchg128() boot_cpu_has(X86_FEATURE_CX16)
#endif /* _ASM_X86_CMPXCHG_64_H */
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 4d58b97..ae2fcb9 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -349,23 +349,6 @@ do { \
#define this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(2, volatile, pcp, oval, nval)
#define this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(4, volatile, pcp, oval, nval)
-#ifdef CONFIG_X86_CMPXCHG64
-#define percpu_cmpxchg8b_double(pcp1, pcp2, o1, o2, n1, n2) \
-({ \
- bool __ret; \
- typeof(pcp1) __o1 = (o1), __n1 = (n1); \
- typeof(pcp2) __o2 = (o2), __n2 = (n2); \
- asm volatile("cmpxchg8b "__percpu_arg(1) \
- CC_SET(z) \
- : CC_OUT(z) (__ret), "+m" (pcp1), "+m" (pcp2), "+a" (__o1), "+d" (__o2) \
- : "b" (__n1), "c" (__n2)); \
- __ret; \
-})
-
-#define raw_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
-#define this_cpu_cmpxchg_double_4 percpu_cmpxchg8b_double
-#endif /* CONFIG_X86_CMPXCHG64 */
-
/*
* Per cpu atomic 64 bit operations are only available under 64 bit.
* 32 bit must fall back to generic operations.
@@ -388,30 +371,6 @@ do { \
#define this_cpu_add_return_8(pcp, val) percpu_add_return_op(8, volatile, pcp, val)
#define this_cpu_xchg_8(pcp, nval) percpu_xchg_op(8, volatile, pcp, nval)
#define this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(8, volatile, pcp, oval, nval)
-
-/*
- * Pretty complex macro to generate cmpxchg16 instruction. The instruction
- * is not supported on early AMD64 processors so we must be able to emulate
- * it in software. The address used in the cmpxchg16 instruction must be
- * aligned to a 16 byte boundary.
- */
-#define percpu_cmpxchg16b_double(pcp1, pcp2, o1, o2, n1, n2) \
-({ \
- bool __ret; \
- typeof(pcp1) __o1 = (o1), __n1 = (n1); \
- typeof(pcp2) __o2 = (o2), __n2 = (n2); \
- alternative_io("leaq %P1,%%rsi\n\tcall this_cpu_cmpxchg16b_emu\n\t", \
- "cmpxchg16b " __percpu_arg(1) "\n\tsetz %0\n\t", \
- X86_FEATURE_CX16, \
- ASM_OUTPUT2("=a" (__ret), "+m" (pcp1), \
- "+m" (pcp2), "+d" (__o2)), \
- "b" (__n1), "c" (__n2), "a" (__o1) : "rsi"); \
- __ret; \
-})
-
-#define raw_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
-#define this_cpu_cmpxchg_double_8 percpu_cmpxchg16b_double
-
#endif
static __always_inline bool x86_this_cpu_constant_test_bit(unsigned int nr,
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h
index 53d933e..6414530 100644
--- a/include/asm-generic/percpu.h
+++ b/include/asm-generic/percpu.h
@@ -99,19 +99,6 @@ do { \
__ret; \
})
-#define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
-({ \
- typeof(pcp1) *__p1 = raw_cpu_ptr(&(pcp1)); \
- typeof(pcp2) *__p2 = raw_cpu_ptr(&(pcp2)); \
- int __ret = 0; \
- if (*__p1 == (oval1) && *__p2 == (oval2)) { \
- *__p1 = nval1; \
- *__p2 = nval2; \
- __ret = 1; \
- } \
- (__ret); \
-})
-
#define __this_cpu_generic_read_nopreempt(pcp) \
({ \
typeof(pcp) ___ret; \
@@ -180,17 +167,6 @@ do { \
__ret; \
})
-#define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
-({ \
- int __ret; \
- unsigned long __flags; \
- raw_local_irq_save(__flags); \
- __ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \
- oval1, oval2, nval1, nval2); \
- raw_local_irq_restore(__flags); \
- __ret; \
-})
-
#ifndef raw_cpu_read_1
#define raw_cpu_read_1(pcp) raw_cpu_generic_read(pcp)
#endif
@@ -307,23 +283,6 @@ do { \
raw_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
-#ifndef raw_cpu_cmpxchg_double_1
-#define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-#ifndef raw_cpu_cmpxchg_double_2
-#define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-#ifndef raw_cpu_cmpxchg_double_4
-#define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-#ifndef raw_cpu_cmpxchg_double_8
-#define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-
#ifndef this_cpu_read_1
#define this_cpu_read_1(pcp) this_cpu_generic_read(pcp)
#endif
@@ -440,21 +399,4 @@ do { \
this_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
-#ifndef this_cpu_cmpxchg_double_1
-#define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-#ifndef this_cpu_cmpxchg_double_2
-#define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-#ifndef this_cpu_cmpxchg_double_4
-#define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-#ifndef this_cpu_cmpxchg_double_8
-#define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
-#endif
-
#endif /* _ASM_GENERIC_PERCPU_H_ */
diff --git a/include/linux/atomic/atomic-instrumented.h b/include/linux/atomic/atomic-instrumented.h
index 8583720..a55b5b7 100644
--- a/include/linux/atomic/atomic-instrumented.h
+++ b/include/linux/atomic/atomic-instrumented.h
@@ -2234,21 +2234,6 @@ atomic_long_dec_if_positive(atomic_long_t *v)
arch_try_cmpxchg128_local(__ai_ptr, __ai_oldp, __VA_ARGS__); \
})
-#define cmpxchg_double(ptr, ...) \
-({ \
- typeof(ptr) __ai_ptr = (ptr); \
- kcsan_mb(); \
- instrument_atomic_read_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \
- arch_cmpxchg_double(__ai_ptr, __VA_ARGS__); \
-})
-
-
-#define cmpxchg_double_local(ptr, ...) \
-({ \
- typeof(ptr) __ai_ptr = (ptr); \
- instrument_atomic_read_write(__ai_ptr, 2 * sizeof(*__ai_ptr)); \
- arch_cmpxchg_double_local(__ai_ptr, __VA_ARGS__); \
-})
#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */
-// 82d1be694fab30414527d0877c29fa75ed5a0b74
+// 3611991b015450e119bcd7417a9431af7f3ba13c
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index e60727b..ba9a612 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -343,33 +343,6 @@ static __always_inline void __this_cpu_preempt_check(const char *op) { }
pscr2_ret__; \
})
-/*
- * Special handling for cmpxchg_double. cmpxchg_double is passed two
- * percpu variables. The first has to be aligned to a double word
- * boundary and the second has to follow directly thereafter.
- * We enforce this on all architectures even if they don't support
- * a double cmpxchg instruction, since it's a cheap requirement, and it
- * avoids breaking the requirement for architectures with the instruction.
- */
-#define __pcpu_double_call_return_bool(stem, pcp1, pcp2, ...) \
-({ \
- bool pdcrb_ret__; \
- __verify_pcpu_ptr(&(pcp1)); \
- BUILD_BUG_ON(sizeof(pcp1) != sizeof(pcp2)); \
- VM_BUG_ON((unsigned long)(&(pcp1)) % (2 * sizeof(pcp1))); \
- VM_BUG_ON((unsigned long)(&(pcp2)) != \
- (unsigned long)(&(pcp1)) + sizeof(pcp1)); \
- switch(sizeof(pcp1)) { \
- case 1: pdcrb_ret__ = stem##1(pcp1, pcp2, __VA_ARGS__); break; \
- case 2: pdcrb_ret__ = stem##2(pcp1, pcp2, __VA_ARGS__); break; \
- case 4: pdcrb_ret__ = stem##4(pcp1, pcp2, __VA_ARGS__); break; \
- case 8: pdcrb_ret__ = stem##8(pcp1, pcp2, __VA_ARGS__); break; \
- default: \
- __bad_size_call_parameter(); break; \
- } \
- pdcrb_ret__; \
-})
-
#define __pcpu_size_call(stem, variable, ...) \
do { \
__verify_pcpu_ptr(&(variable)); \
@@ -426,9 +399,6 @@ do { \
#define raw_cpu_xchg(pcp, nval) __pcpu_size_call_return2(raw_cpu_xchg_, pcp, nval)
#define raw_cpu_cmpxchg(pcp, oval, nval) \
__pcpu_size_call_return2(raw_cpu_cmpxchg_, pcp, oval, nval)
-#define raw_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- __pcpu_double_call_return_bool(raw_cpu_cmpxchg_double_, pcp1, pcp2, oval1, oval2, nval1, nval2)
-
#define raw_cpu_sub(pcp, val) raw_cpu_add(pcp, -(val))
#define raw_cpu_inc(pcp) raw_cpu_add(pcp, 1)
#define raw_cpu_dec(pcp) raw_cpu_sub(pcp, 1)
@@ -488,11 +458,6 @@ do { \
raw_cpu_cmpxchg(pcp, oval, nval); \
})
-#define __this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
-({ __this_cpu_preempt_check("cmpxchg_double"); \
- raw_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2); \
-})
-
#define __this_cpu_sub(pcp, val) __this_cpu_add(pcp, -(typeof(pcp))(val))
#define __this_cpu_inc(pcp) __this_cpu_add(pcp, 1)
#define __this_cpu_dec(pcp) __this_cpu_sub(pcp, 1)
@@ -513,9 +478,6 @@ do { \
#define this_cpu_xchg(pcp, nval) __pcpu_size_call_return2(this_cpu_xchg_, pcp, nval)
#define this_cpu_cmpxchg(pcp, oval, nval) \
__pcpu_size_call_return2(this_cpu_cmpxchg_, pcp, oval, nval)
-#define this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
- __pcpu_double_call_return_bool(this_cpu_cmpxchg_double_, pcp1, pcp2, oval1, oval2, nval1, nval2)
-
#define this_cpu_sub(pcp, val) this_cpu_add(pcp, -(typeof(pcp))(val))
#define this_cpu_inc(pcp) this_cpu_add(pcp, 1)
#define this_cpu_dec(pcp) this_cpu_sub(pcp, 1)
diff --git a/scripts/atomic/gen-atomic-instrumented.sh b/scripts/atomic/gen-atomic-instrumented.sh
index 4f80347..a2ef735 100755
--- a/scripts/atomic/gen-atomic-instrumented.sh
+++ b/scripts/atomic/gen-atomic-instrumented.sh
@@ -84,7 +84,6 @@ gen_xchg()
{
local xchg="$1"; shift
local order="$1"; shift
- local mult="$1"; shift
kcsan_barrier=""
if [ "${xchg%_local}" = "${xchg}" ]; then
@@ -104,8 +103,8 @@ cat <<EOF
EOF
[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
cat <<EOF
- instrument_atomic_read_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\
- instrument_read_write(__ai_oldp, ${mult}sizeof(*__ai_oldp)); \\
+ instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\
+ instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \\
arch_${xchg}${order}(__ai_ptr, __ai_oldp, __VA_ARGS__); \\
})
EOF
@@ -168,22 +167,16 @@ done
for xchg in "xchg" "cmpxchg" "cmpxchg64" "cmpxchg128" "try_cmpxchg" "try_cmpxchg64" "try_cmpxchg128"; do
for order in "" "_acquire" "_release" "_relaxed"; do
- gen_xchg "${xchg}" "${order}" ""
+ gen_xchg "${xchg}" "${order}"
printf "\n"
done
done
for xchg in "cmpxchg_local" "cmpxchg64_local" "cmpxchg128_local" "sync_cmpxchg" "try_cmpxchg_local" "try_cmpxchg64_local" "try_cmpxchg128_local"; do
- gen_xchg "${xchg}" "" ""
+ gen_xchg "${xchg}" ""
printf "\n"
done
-gen_xchg "cmpxchg_double" "" "2 * "
-
-printf "\n\n"
-
-gen_xchg "cmpxchg_double_local" "" "2 * "
-
cat <<EOF
#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */
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