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Message-ID: <201806052251.9Yk7coy8%fengguang.wu@intel.com>
Date: Tue, 5 Jun 2018 22:07:53 +0800
From: kbuild test robot <lkp@...el.com>
To: Nadav Amit <namit@...are.com>
Cc: kbuild-all@...org, linux-kernel@...r.kernel.org, x86@...nel.org,
Nadav Amit <namit@...are.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH v2 4/9] x86: alternatives: macrofy locks for better
inlining
Hi Nadav,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on linus/master]
[also build test ERROR on v4.17 next-20180604]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Nadav-Amit/x86-macrofying-inline-asm-for-better-compilation/20180605-124313
config: um-x86_64_defconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=um SUBARCH=x86_64
All errors (new ones prefixed by >>):
arch/x86/include/asm/bitops.h: Assembler messages:
>> arch/x86/include/asm/bitops.h:220: Error: no such instruction: `lock_prefix btsq $0,(%rax)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 28(%r12)'
--
arch/x86/include/asm/atomic64_64.h: Assembler messages:
>> arch/x86/include/asm/atomic64_64.h:87: Error: no such instruction: `lock_prefix incq 1000(%rcx,%rdx)'
>> arch/x86/include/asm/atomic64_64.h:87: Error: no such instruction: `lock_prefix incq 64(%rdx)'
--
arch/x86/include/asm/bitops.h: Assembler messages:
>> arch/x86/include/asm/bitops.h:267: Error: no such instruction: `lock_prefix btrq $8,8(%rax)'
--
arch/x86/include/asm/bitops.h: Assembler messages:
>> arch/x86/include/asm/bitops.h:76: Error: no such instruction: `lock_prefix orb $2,8(%rax)'
--
arch/x86/include/asm/bitops.h: Assembler messages:
arch/x86/include/asm/bitops.h:76: Error: no such instruction: `lock_prefix orb $1,120(%rax)'
>> arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-2,120(%rax)'
>> arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-2,120(%rdx)'
>> arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-2,120(%rdx)'
arch/x86/include/asm/bitops.h:76: Error: no such instruction: `lock_prefix orb $1,120(%rax)'
>> arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-2,120(%rax)'
--
arch/x86/include/asm/atomic.h: Assembler messages:
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 16(%r12)'
arch/x86/include/asm/atomic.h:108: Error: no such instruction: `lock_prefix decl 16(%r12)'
--
arch/x86/include/asm/atomic.h: Assembler messages:
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl (%rdx)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl (%rdx)'
--
arch/x86/include/asm/atomic64_64.h: Assembler messages:
>> arch/x86/include/asm/atomic64_64.h:46: Error: no such instruction: `lock_prefix addq %rsi,1008(%rdx,%rax)'
>> arch/x86/include/asm/atomic64_64.h:46: Error: no such instruction: `lock_prefix addq %rsi,72(%rax)'
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 72(%rax)'
>> arch/x86/include/asm/atomic64_64.h:183: Error: no such instruction: `lock_prefix cmpxchgq %rcx,56(%rdx)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 76(%rdi)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl (%r12)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 72(%rdi)'
>> arch/x86/include/asm/atomic64_64.h:87: Error: no such instruction: `lock_prefix incq 56(%rsi)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 72(%rdi)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 76(%rbx)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl -868(%rbx)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl (%rdi)'
arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-5,8(%rax)'
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl (%rdi)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl (%rax)'
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 72(%rbx)'
>> arch/x86/include/asm/atomic64_64.h:87: Error: no such instruction: `lock_prefix incq 56(%rax)'
>> arch/x86/include/asm/atomic.h:108: Error: no such instruction: `lock_prefix decl 296(%rcx)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 24(%rdx)'
>> arch/x86/include/asm/atomic64_64.h:87: Error: no such instruction: `lock_prefix incq (%rbx)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 8(%rbx)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 12(%rbx)'
arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-2,8(%rax)'
>> arch/x86/include/asm/bitops.h:76: Error: no such instruction: `lock_prefix orb $1,600(%r15)'
arch/x86/include/asm/bitops.h:76: Error: no such instruction: `lock_prefix orb $2,9(%rax)'
>> arch/x86/include/asm/bitops.h:76: Error: no such instruction: `lock_prefix orb $2,8(%rax)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 4(%rax)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 4(%rax)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl (%rax)'
>> arch/x86/include/asm/atomic.h:108: Error: no such instruction: `lock_prefix decl 4(%rax)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 16(%rbx)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 16(%rbx)'
--
arch/x86/include/asm/bitops.h: Assembler messages:
>> arch/x86/include/asm/bitops.h:81: Error: no such instruction: `lock_prefix btsq %rbx,(%rax)'
>> arch/x86/include/asm/atomic.h:191: Error: no such instruction: `lock_prefix cmpxchgl %ecx,(%rdx)'
>> arch/x86/include/asm/atomic.h:191: Error: no such instruction: `lock_prefix cmpxchgl %ecx,(%rdx)'
--
arch/x86/include/asm/atomic.h: Assembler messages:
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl -1408(%rdi)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl (%r15)'
arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 76(%rbx)'
>> arch/x86/include/asm/atomic.h:108: Error: no such instruction: `lock_prefix decl 4(%rax)'
>> arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-3,8(%rcx)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 4(%rax)'
arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 28(%rdi)'
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 16(%r14)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 16(%r14)'
>> include/asm-generic/atomic-instrumented.h:362: Error: no such instruction: `lock_prefix cmpxchgl %r8d,560(%r14)'
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 16(%r14)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 16(%r14)'
>> arch/x86/include/asm/atomic.h:96: Error: no such instruction: `lock_prefix incl 16(%r14)'
>> arch/x86/include/asm/atomic.h:122: Error: no such instruction: `lock_prefix decl 16(%r14)'
--
arch/x86/include/asm/bitops.h: Assembler messages:
>> arch/x86/include/asm/bitops.h:220: Error: no such instruction: `lock_prefix btsq $0,8(%rbx)'
arch/x86/include/asm/bitops.h:114: Error: no such instruction: `lock_prefix andb $-2,(%rax)'
>> arch/x86/include/asm/bitops.h:220: Error: no such instruction: `lock_prefix btsq $0,72(%rdi)'
>> arch/x86/include/asm/bitops.h:267: Error: no such instruction: `lock_prefix btrq $0,8(%r15)'
..
vim +220 arch/x86/include/asm/bitops.h
1a750e0cd include/asm-x86/bitops.h Linus Torvalds 2008-06-18 56
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 57 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 58 * set_bit - Atomically set a bit in memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 59 * @nr: the bit to set
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 60 * @addr: the address to start counting from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 61 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 62 * This function is atomic and may not be reordered. See __set_bit()
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 63 * if you do not require the atomic guarantees.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 64 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 65 * Note: there are no guarantees that this function will not be reordered
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 66 * on non x86 architectures, so if you are writing portable code,
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 67 * make sure not to rely on its reordering guarantees.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 68 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 69 * Note that @nr may be almost arbitrarily large; this function is not
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 70 * restricted to acting on a single-word quantity.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 71 */
c8399943b arch/x86/include/asm/bitops.h Andi Kleen 2009-01-12 72 static __always_inline void
9b710506a arch/x86/include/asm/bitops.h H. Peter Anvin 2013-07-16 73 set_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 74 {
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 75 if (IS_IMMEDIATE(nr)) {
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 @76 asm volatile(LOCK_PREFIX "orb %1,%0"
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 77 : CONST_MASK_ADDR(nr, addr)
437a0a54e include/asm-x86/bitops.h Ingo Molnar 2008-06-20 78 : "iq" ((u8)CONST_MASK(nr))
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 79 : "memory");
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 80 } else {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 @81 asm volatile(LOCK_PREFIX __ASM_SIZE(bts) " %1,%0"
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 82 : BITOP_ADDR(addr) : "Ir" (nr) : "memory");
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 83 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 84 }
1a750e0cd include/asm-x86/bitops.h Linus Torvalds 2008-06-18 85
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 86 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 87 * __set_bit - Set a bit in memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 88 * @nr: the bit to set
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 89 * @addr: the address to start counting from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 90 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 91 * Unlike set_bit(), this function is non-atomic and may be reordered.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 92 * If it's called on the same region of memory simultaneously, the effect
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 93 * may be that only one operation succeeds.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 94 */
8dd5032d9 arch/x86/include/asm/bitops.h Denys Vlasenko 2016-02-07 95 static __always_inline void __set_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 96 {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 97 asm volatile(__ASM_SIZE(bts) " %1,%0" : ADDR : "Ir" (nr) : "memory");
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 98 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 99
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 100 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 101 * clear_bit - Clears a bit in memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 102 * @nr: Bit to clear
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 103 * @addr: Address to start counting from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 104 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 105 * clear_bit() is atomic and may not be reordered. However, it does
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 106 * not contain a memory barrier, so if it is used for locking purposes,
d00a56928 arch/x86/include/asm/bitops.h Peter Zijlstra 2014-03-13 107 * you should call smp_mb__before_atomic() and/or smp_mb__after_atomic()
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 108 * in order to ensure changes are visible on other processors.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 109 */
c8399943b arch/x86/include/asm/bitops.h Andi Kleen 2009-01-12 110 static __always_inline void
9b710506a arch/x86/include/asm/bitops.h H. Peter Anvin 2013-07-16 111 clear_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 112 {
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 113 if (IS_IMMEDIATE(nr)) {
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 @114 asm volatile(LOCK_PREFIX "andb %1,%0"
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 115 : CONST_MASK_ADDR(nr, addr)
437a0a54e include/asm-x86/bitops.h Ingo Molnar 2008-06-20 116 : "iq" ((u8)~CONST_MASK(nr)));
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 117 } else {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 @118 asm volatile(LOCK_PREFIX __ASM_SIZE(btr) " %1,%0"
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 119 : BITOP_ADDR(addr)
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 120 : "Ir" (nr));
7dbceaf9b include/asm-x86/bitops.h Ingo Molnar 2008-06-20 121 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 122 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 123
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 124 /*
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 125 * clear_bit_unlock - Clears a bit in memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 126 * @nr: Bit to clear
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 127 * @addr: Address to start counting from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 128 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 129 * clear_bit() is atomic and implies release semantics before the memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 130 * operation. It can be used for an unlock.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 131 */
8dd5032d9 arch/x86/include/asm/bitops.h Denys Vlasenko 2016-02-07 132 static __always_inline void clear_bit_unlock(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 133 {
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 134 barrier();
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 135 clear_bit(nr, addr);
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 136 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 137
8dd5032d9 arch/x86/include/asm/bitops.h Denys Vlasenko 2016-02-07 138 static __always_inline void __clear_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 139 {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 140 asm volatile(__ASM_SIZE(btr) " %1,%0" : ADDR : "Ir" (nr));
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 141 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 142
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 143 static __always_inline bool clear_bit_unlock_is_negative_byte(long nr, volatile unsigned long *addr)
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 144 {
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 145 bool negative;
3c52b5c64 arch/x86/include/asm/bitops.h Uros Bizjak 2017-09-06 @146 asm volatile(LOCK_PREFIX "andb %2,%1"
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 147 CC_SET(s)
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 148 : CC_OUT(s) (negative), ADDR
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 149 : "ir" ((char) ~(1 << nr)) : "memory");
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 150 return negative;
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 151 }
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 152
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 153 // Let everybody know we have it
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 154 #define clear_bit_unlock_is_negative_byte clear_bit_unlock_is_negative_byte
b91e1302a arch/x86/include/asm/bitops.h Linus Torvalds 2016-12-27 155
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 156 /*
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 157 * __clear_bit_unlock - Clears a bit in memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 158 * @nr: Bit to clear
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 159 * @addr: Address to start counting from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 160 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 161 * __clear_bit() is non-atomic and implies release semantics before the memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 162 * operation. It can be used for an unlock if no other CPUs can concurrently
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 163 * modify other bits in the word.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 164 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 165 * No memory barrier is required here, because x86 cannot reorder stores past
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 166 * older loads. Same principle as spin_unlock.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 167 */
8dd5032d9 arch/x86/include/asm/bitops.h Denys Vlasenko 2016-02-07 168 static __always_inline void __clear_bit_unlock(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 169 {
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 170 barrier();
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 171 __clear_bit(nr, addr);
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 172 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 173
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 174 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 175 * __change_bit - Toggle a bit in memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 176 * @nr: the bit to change
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 177 * @addr: the address to start counting from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 178 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 179 * Unlike change_bit(), this function is non-atomic and may be reordered.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 180 * If it's called on the same region of memory simultaneously, the effect
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 181 * may be that only one operation succeeds.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 182 */
8dd5032d9 arch/x86/include/asm/bitops.h Denys Vlasenko 2016-02-07 183 static __always_inline void __change_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 184 {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 185 asm volatile(__ASM_SIZE(btc) " %1,%0" : ADDR : "Ir" (nr));
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 186 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 187
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 188 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 189 * change_bit - Toggle a bit in memory
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 190 * @nr: Bit to change
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 191 * @addr: Address to start counting from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 192 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 193 * change_bit() is atomic and may not be reordered.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 194 * Note that @nr may be almost arbitrarily large; this function is not
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 195 * restricted to acting on a single-word quantity.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 196 */
8dd5032d9 arch/x86/include/asm/bitops.h Denys Vlasenko 2016-02-07 197 static __always_inline void change_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 198 {
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 199 if (IS_IMMEDIATE(nr)) {
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 200 asm volatile(LOCK_PREFIX "xorb %1,%0"
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 201 : CONST_MASK_ADDR(nr, addr)
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 202 : "iq" ((u8)CONST_MASK(nr)));
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 203 } else {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 204 asm volatile(LOCK_PREFIX __ASM_SIZE(btc) " %1,%0"
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 205 : BITOP_ADDR(addr)
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 206 : "Ir" (nr));
838e8bb71 arch/x86/include/asm/bitops.h Uros Bizjak 2008-10-24 207 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 208 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 209
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 210 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 211 * test_and_set_bit - Set a bit and return its old value
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 212 * @nr: Bit to set
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 213 * @addr: Address to count from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 214 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 215 * This operation is atomic and cannot be reordered.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 216 * It also implies a memory barrier.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 217 */
117780eef arch/x86/include/asm/bitops.h H. Peter Anvin 2016-06-08 218 static __always_inline bool test_and_set_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 219 {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 @220 GEN_BINARY_RMWcc(LOCK_PREFIX __ASM_SIZE(bts),
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 221 *addr, "Ir", nr, "%0", c);
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 222 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 223
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 224 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 225 * test_and_set_bit_lock - Set a bit and return its old value for lock
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 226 * @nr: Bit to set
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 227 * @addr: Address to count from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 228 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 229 * This is the same as test_and_set_bit on x86.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 230 */
117780eef arch/x86/include/asm/bitops.h H. Peter Anvin 2016-06-08 231 static __always_inline bool
9b710506a arch/x86/include/asm/bitops.h H. Peter Anvin 2013-07-16 232 test_and_set_bit_lock(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 233 {
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 234 return test_and_set_bit(nr, addr);
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 235 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 236
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 237 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 238 * __test_and_set_bit - Set a bit and return its old value
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 239 * @nr: Bit to set
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 240 * @addr: Address to count from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 241 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 242 * This operation is non-atomic and can be reordered.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 243 * If two examples of this operation race, one can appear to succeed
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 244 * but actually fail. You must protect multiple accesses with a lock.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 245 */
117780eef arch/x86/include/asm/bitops.h H. Peter Anvin 2016-06-08 246 static __always_inline bool __test_and_set_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 247 {
117780eef arch/x86/include/asm/bitops.h H. Peter Anvin 2016-06-08 248 bool oldbit;
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 249
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 250 asm(__ASM_SIZE(bts) " %2,%1"
86b61240d arch/x86/include/asm/bitops.h H. Peter Anvin 2016-06-08 251 CC_SET(c)
86b61240d arch/x86/include/asm/bitops.h H. Peter Anvin 2016-06-08 252 : CC_OUT(c) (oldbit), ADDR
eb2b4e682 include/asm-x86/bitops.h Simon Holm Thøgersen 2008-05-05 253 : "Ir" (nr));
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 254 return oldbit;
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 255 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 256
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 257 /**
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 258 * test_and_clear_bit - Clear a bit and return its old value
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 259 * @nr: Bit to clear
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 260 * @addr: Address to count from
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 261 *
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 262 * This operation is atomic and cannot be reordered.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 263 * It also implies a memory barrier.
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 264 */
117780eef arch/x86/include/asm/bitops.h H. Peter Anvin 2016-06-08 265 static __always_inline bool test_and_clear_bit(long nr, volatile unsigned long *addr)
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 266 {
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 @267 GEN_BINARY_RMWcc(LOCK_PREFIX __ASM_SIZE(btr),
22636f8c9 arch/x86/include/asm/bitops.h Jan Beulich 2018-02-26 268 *addr, "Ir", nr, "%0", c);
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 269 }
1c54d7707 include/asm-x86/bitops.h Jeremy Fitzhardinge 2008-01-30 270
:::::: The code at line 220 was first introduced by commit
:::::: 22636f8c9511245cb3c8412039f1dd95afb3aa59 x86/asm: Add instruction suffixes to bitops
:::::: TO: Jan Beulich <JBeulich@...e.com>
:::::: CC: Thomas Gleixner <tglx@...utronix.de>
---
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