* [jpoimboe:objtool-werror 6/7] arch/x86/include/asm/uaccess_64.h:128:3: error: unknown directive
@ 2025-04-05 4:07 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-04-05 4:07 UTC (permalink / raw)
To: Josh Poimboeuf; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git objtool-werror
head: d9200f830505ef0415720e0bd90fe183e62222c5
commit: 31eabb43d04f7a788da11c3c06cb00ace7e6bd2e [6/7] x86/alternative: Improve code generation readability
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250405/202504051253.2t0cOwDF-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250405/202504051253.2t0cOwDF-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202504051253.2t0cOwDF-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from mm/maccess.c:6:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:35:2: error: unknown directive
35 | alternative("", "stac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/maccess.c:6:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:22:
>> arch/x86/include/asm/uaccess_64.h:128:3: error: unknown directive
128 | ALTERNATIVE("rep movsb",
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:154: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte (((1 << 0) << 16) | ((18*32+ 4))); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/maccess.c:6:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:29:2: error: unknown directive
29 | alternative("", "clac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/maccess.c:6:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:35:2: error: unknown directive
35 | alternative("", "stac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/maccess.c:6:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:22:
>> arch/x86/include/asm/uaccess_64.h:128:3: error: unknown directive
128 | ALTERNATIVE("rep movsb",
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:154: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte (((1 << 0) << 16) | ((18*32+ 4))); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/maccess.c:6:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:29:2: error: unknown directive
29 | alternative("", "clac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
6 errors generated.
--
mm/shmem.c:1689:20: warning: unused function 'shmem_show_mpol' [-Wunused-function]
1689 | static inline void shmem_show_mpol(struct seq_file *seq, struct mempolicy *mpol)
| ^~~~~~~~~~~~~~~
In file included from mm/shmem.c:24:
In file included from include/linux/fs.h:7:
In file included from include/linux/wait_bit.h:8:
In file included from include/linux/wait.h:9:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/thread_info.h:60:
In file included from arch/x86/include/asm/thread_info.h:12:
In file included from arch/x86/include/asm/page.h:12:
>> arch/x86/include/asm/page_64.h:54:2: error: unknown directive
54 | alternative_call_2(clear_page_orig,
| ^
arch/x86/include/asm/alternative.h:275:22: note: expanded from macro 'alternative_call_2'
275 | asm_inline volatile(ALTERNATIVE_2("call %c[old]", "call %c[new1]", ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:16: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:131: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 3*32+16); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/shmem.c:24:
In file included from include/linux/fs.h:7:
In file included from include/linux/wait_bit.h:8:
In file included from include/linux/wait.h:9:
In file included from include/linux/spinlock.h:60:
In file included from include/linux/thread_info.h:60:
In file included from arch/x86/include/asm/thread_info.h:12:
In file included from arch/x86/include/asm/page.h:12:
>> arch/x86/include/asm/page_64.h:54:2: error: unknown directive
54 | alternative_call_2(clear_page_orig,
| ^
arch/x86/include/asm/alternative.h:275:22: note: expanded from macro 'alternative_call_2'
275 | asm_inline volatile(ALTERNATIVE_2("call %c[old]", "call %c[new1]", ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:2: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:12:131: note: instantiated into assembly here
12 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+ 9); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
1 warning and 2 errors generated.
--
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:2: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:12:124: note: instantiated into assembly here
12 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte 519; .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:42:
In file included from include/linux/kernel_stat.h:7:
In file included from include/linux/percpu.h:12:
In file included from include/linux/sched.h:14:
In file included from include/linux/thread_info.h:60:
In file included from arch/x86/include/asm/thread_info.h:59:
arch/x86/include/asm/cpufeature.h:101:11: error: unknown directive
101 | asm goto(ALTERNATIVE_TERNARY("jmp 6f", %c[feature], "", "jmp %l[t_no]")
| ^
arch/x86/include/asm/alternative.h:213:2: note: expanded from macro 'ALTERNATIVE_TERNARY'
213 | ALTERNATIVE_2(oldinstr, newinstr_no, X86_FEATURE_ALWAYS, newinstr_yes, ft_flags)
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:16: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:131: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 3*32+21); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:42:
In file included from include/linux/kernel_stat.h:7:
In file included from include/linux/percpu.h:12:
In file included from include/linux/sched.h:14:
In file included from include/linux/thread_info.h:60:
In file included from arch/x86/include/asm/thread_info.h:59:
arch/x86/include/asm/cpufeature.h:101:11: error: unknown directive
101 | asm goto(ALTERNATIVE_TERNARY("jmp 6f", %c[feature], "", "jmp %l[t_no]")
| ^
arch/x86/include/asm/alternative.h:213:2: note: expanded from macro 'ALTERNATIVE_TERNARY'
213 | ALTERNATIVE_2(oldinstr, newinstr_no, X86_FEATURE_ALWAYS, newinstr_yes, ft_flags)
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:2: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:12:124: note: instantiated into assembly here
12 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte 519; .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:43:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:35:2: error: unknown directive
35 | alternative("", "stac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:43:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:22:
>> arch/x86/include/asm/uaccess_64.h:128:3: error: unknown directive
128 | ALTERNATIVE("rep movsb",
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:154: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte (((1 << 0) << 16) | ((18*32+ 4))); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:43:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:29:2: error: unknown directive
29 | alternative("", "clac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:43:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:35:2: error: unknown directive
35 | alternative("", "stac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:43:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:22:
>> arch/x86/include/asm/uaccess_64.h:128:3: error: unknown directive
128 | ALTERNATIVE("rep movsb",
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:154: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte (((1 << 0) << 16) | ((18*32+ 4))); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:43:
In file included from include/linux/mm.h:35:
In file included from include/linux/rcuwait.h:6:
In file included from include/linux/sched/signal.h:9:
In file included from include/linux/sched/task.h:13:
In file included from include/linux/uaccess.h:12:
In file included from arch/x86/include/asm/uaccess.h:15:
arch/x86/include/asm/smap.h:29:2: error: unknown directive
29 | alternative("", "clac", X86_FEATURE_SMAP);
| ^
arch/x86/include/asm/alternative.h:228:22: note: expanded from macro 'alternative'
228 | asm_inline volatile(ALTERNATIVE(oldinstr, newinstr, ft_flags) : : : "memory")
| ^
arch/x86/include/asm/alternative.h:193:2: note: expanded from macro 'ALTERNATIVE'
193 | __ALTERNATIVE("\t" oldinstr, newinstr, ft_flags) "\n"
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:6:131: note: instantiated into assembly here
6 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+20); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:42:
In file included from include/linux/kernel_stat.h:7:
In file included from include/linux/percpu.h:12:
In file included from include/linux/sched.h:13:
In file included from arch/x86/include/asm/processor.h:20:
In file included from arch/x86/include/asm/page.h:12:
>> arch/x86/include/asm/page_64.h:54:2: error: unknown directive
54 | alternative_call_2(clear_page_orig,
| ^
arch/x86/include/asm/alternative.h:275:22: note: expanded from macro 'alternative_call_2'
275 | asm_inline volatile(ALTERNATIVE_2("call %c[old]", "call %c[new1]", ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:16: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:131: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 3*32+16); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:42:
In file included from include/linux/kernel_stat.h:7:
In file included from include/linux/percpu.h:12:
In file included from include/linux/sched.h:13:
In file included from arch/x86/include/asm/processor.h:20:
In file included from arch/x86/include/asm/page.h:12:
>> arch/x86/include/asm/page_64.h:54:2: error: unknown directive
54 | alternative_call_2(clear_page_orig,
| ^
arch/x86/include/asm/alternative.h:275:22: note: expanded from macro 'alternative_call_2'
275 | asm_inline volatile(ALTERNATIVE_2("call %c[old]", "call %c[new1]", ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:2: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:12:131: note: instantiated into assembly here
12 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 9*32+ 9); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:42:
In file included from include/linux/kernel_stat.h:7:
In file included from include/linux/percpu.h:12:
In file included from include/linux/sched.h:14:
In file included from include/linux/thread_info.h:60:
In file included from arch/x86/include/asm/thread_info.h:59:
arch/x86/include/asm/cpufeature.h:101:11: error: unknown directive
101 | asm goto(ALTERNATIVE_TERNARY("jmp 6f", %c[feature], "", "jmp %l[t_no]")
| ^
arch/x86/include/asm/alternative.h:213:2: note: expanded from macro 'ALTERNATIVE_TERNARY'
213 | ALTERNATIVE_2(oldinstr, newinstr_no, X86_FEATURE_ALWAYS, newinstr_yes, ft_flags)
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:16: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:131: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 3*32+21); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:42:
In file included from include/linux/kernel_stat.h:7:
In file included from include/linux/percpu.h:12:
In file included from include/linux/sched.h:14:
In file included from include/linux/thread_info.h:60:
In file included from arch/x86/include/asm/thread_info.h:59:
arch/x86/include/asm/cpufeature.h:101:11: error: unknown directive
101 | asm goto(ALTERNATIVE_TERNARY("jmp 6f", %c[feature], "", "jmp %l[t_no]")
| ^
arch/x86/include/asm/alternative.h:213:2: note: expanded from macro 'ALTERNATIVE_TERNARY'
213 | ALTERNATIVE_2(oldinstr, newinstr_no, X86_FEATURE_ALWAYS, newinstr_yes, ft_flags)
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:2: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:12:124: note: instantiated into assembly here
12 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte 519; .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
| ^
In file included from mm/memory.c:42:
In file included from include/linux/kernel_stat.h:7:
In file included from include/linux/percpu.h:12:
In file included from include/linux/sched.h:14:
In file included from include/linux/thread_info.h:60:
In file included from arch/x86/include/asm/thread_info.h:59:
arch/x86/include/asm/cpufeature.h:101:11: error: unknown directive
101 | asm goto(ALTERNATIVE_TERNARY("jmp 6f", %c[feature], "", "jmp %l[t_no]")
| ^
arch/x86/include/asm/alternative.h:213:2: note: expanded from macro 'ALTERNATIVE_TERNARY'
213 | ALTERNATIVE_2(oldinstr, newinstr_no, X86_FEATURE_ALWAYS, newinstr_yes, ft_flags)
| ^
arch/x86/include/asm/alternative.h:199:2: note: expanded from macro 'ALTERNATIVE_2'
199 | __ALTERNATIVE_2("\n\t" oldinstr, newinstr1, ft_flags1, \
| ^
arch/x86/include/asm/alternative.h:181:16: note: expanded from macro '__ALTERNATIVE_2'
181 | __ALTERNATIVE(__ALTERNATIVE(oldinstr, newinstr1, ft_flags1),\
| ^
arch/x86/include/asm/alternative.h:175:2: note: expanded from macro '__ALTERNATIVE'
175 | OLDINSTR(oldinstr) \
| ^
arch/x86/include/asm/alternative.h:157:3: note: expanded from macro 'OLDINSTR'
157 | "773: "
| ^
<inline asm>:7:131: note: instantiated into assembly here
7 | 773: .pushsection .altinstructions,"a"; .long 771b - .; .long 774f - .; .4byte ( 3*32+21); .byte 773b-771b; .byte 775f-774f; .popsection.pushsection .altinstr_replacement, "ax"
..
vim +128 arch/x86/include/asm/uaccess_64.h
1b1d9258181bae arch/x86/include/asm/uaccess_64.h Jan Beulich 2009-12-18 117
1b1d9258181bae arch/x86/include/asm/uaccess_64.h Jan Beulich 2009-12-18 118 static __always_inline __must_check unsigned long
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 119 copy_user_generic(void *to, const void *from, unsigned long len)
1b1d9258181bae arch/x86/include/asm/uaccess_64.h Jan Beulich 2009-12-18 120 {
3639a535587d7a arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 121 stac();
954e482bde20b0 arch/x86/include/asm/uaccess_64.h Fenghua Yu 2012-05-24 122 /*
adfcf4231b8cbc arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 123 * If CPU has FSRM feature, use 'rep movs'.
427fda2c8a4977 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-16 124 * Otherwise, use rep_movs_alternative.
954e482bde20b0 arch/x86/include/asm/uaccess_64.h Fenghua Yu 2012-05-24 125 */
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 126 asm volatile(
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 127 "1:\n\t"
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 @128 ALTERNATIVE("rep movsb",
427fda2c8a4977 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-16 129 "call rep_movs_alternative", ALT_NOT(X86_FEATURE_FSRM))
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 130 "2:\n"
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 131 _ASM_EXTABLE_UA(1b, 2b)
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 132 :"+c" (len), "+D" (to), "+S" (from), ASM_CALL_CONSTRAINT
ca96b162bfd21a arch/x86/include/asm/uaccess_64.h Mateusz Guzik 2023-08-30 133 : : "memory", "rax");
3639a535587d7a arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 134 clac();
577e6a7fd50d51 arch/x86/include/asm/uaccess_64.h Linus Torvalds 2023-04-15 135 return len;
1b1d9258181bae arch/x86/include/asm/uaccess_64.h Jan Beulich 2009-12-18 136 }
95912008ba1fb9 include/asm-x86_64/uaccess.h Andi Kleen 2006-09-26 137
:::::: The code at line 128 was first introduced by commit
:::::: 577e6a7fd50d519c201d20968b6a027a6563dc4c x86: inline the 'rep movs' in user copies for the FSRM case
:::::: TO: Linus Torvalds <torvalds@linux-foundation.org>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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