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94ea9c0521
The following commit:
ddb5cdbafa ("kbuild: generate KSYMTAB entries by modpost")
deprecated <asm/export.h>, which is now a wrapper of <linux/export.h>.
Use <linux/export.h> in *.S as well as in *.c files.
After all the <asm/export.h> lines are replaced, <asm/export.h> and
<asm-generic/export.h> will be removed.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230806145958.380314-2-masahiroy@kernel.org
86 lines
1.2 KiB
ArmAsm
86 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <linux/export.h>
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#include <linux/linkage.h>
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#include <asm/percpu.h>
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#include <asm/processor-flags.h>
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.text
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#ifndef CONFIG_X86_CMPXCHG64
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/*
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* Emulate 'cmpxchg8b (%esi)' on UP
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*
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* Inputs:
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* %esi : memory location to compare
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* %eax : low 32 bits of old value
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* %edx : high 32 bits of old value
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* %ebx : low 32 bits of new value
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* %ecx : high 32 bits of new value
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*/
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SYM_FUNC_START(cmpxchg8b_emu)
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pushfl
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cli
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cmpl 0(%esi), %eax
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jne .Lnot_same
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cmpl 4(%esi), %edx
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jne .Lnot_same
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movl %ebx, 0(%esi)
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movl %ecx, 4(%esi)
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orl $X86_EFLAGS_ZF, (%esp)
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popfl
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RET
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.Lnot_same:
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movl 0(%esi), %eax
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movl 4(%esi), %edx
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andl $(~X86_EFLAGS_ZF), (%esp)
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popfl
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RET
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SYM_FUNC_END(cmpxchg8b_emu)
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EXPORT_SYMBOL(cmpxchg8b_emu)
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#endif
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#ifndef CONFIG_UML
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SYM_FUNC_START(this_cpu_cmpxchg8b_emu)
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pushfl
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cli
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cmpl PER_CPU_VAR(0(%esi)), %eax
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jne .Lnot_same2
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cmpl PER_CPU_VAR(4(%esi)), %edx
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jne .Lnot_same2
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movl %ebx, PER_CPU_VAR(0(%esi))
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movl %ecx, PER_CPU_VAR(4(%esi))
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orl $X86_EFLAGS_ZF, (%esp)
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popfl
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RET
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.Lnot_same2:
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movl PER_CPU_VAR(0(%esi)), %eax
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movl PER_CPU_VAR(4(%esi)), %edx
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andl $(~X86_EFLAGS_ZF), (%esp)
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popfl
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RET
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SYM_FUNC_END(this_cpu_cmpxchg8b_emu)
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#endif
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