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Code Issues Releases Wiki Activity

x86/copy_mc_64: Remove .fixup usage 

Place the anonymous .fixup code at the tail of the regular functions.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211110101325.127055887@infradead.org
This commit is contained in:
Peter Zijlstra 2021-11-10 11:01:06 +01:00
parent acba44d243
commit ab0fedcc71
1 changed files with 4 additions and 8 deletions
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12
arch/x86/lib/copy_mc_64.S
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@ -78,9 +78,7 @@ SYM_FUNC_START(copy_mc_fragile)
xorl %eax, %eax
.L_done:
RET
SYM_FUNC_END(copy_mc_fragile)
.section .fixup, "ax"
/*
* Return number of bytes not copied for any failure. Note that
* there is no "tail" handling since the source buffer is 8-byte
@ -105,14 +103,14 @@ SYM_FUNC_END(copy_mc_fragile)
movl %ecx, %edx
jmp copy_mc_fragile_handle_tail
.previous
_ASM_EXTABLE_TYPE(.L_read_leading_bytes, .E_leading_bytes, EX_TYPE_DEFAULT_MCE_SAFE)
_ASM_EXTABLE_TYPE(.L_read_words, .E_read_words, EX_TYPE_DEFAULT_MCE_SAFE)
_ASM_EXTABLE_TYPE(.L_read_trailing_bytes, .E_trailing_bytes, EX_TYPE_DEFAULT_MCE_SAFE)
_ASM_EXTABLE(.L_write_leading_bytes, .E_leading_bytes)
_ASM_EXTABLE(.L_write_words, .E_write_words)
_ASM_EXTABLE(.L_write_trailing_bytes, .E_trailing_bytes)
SYM_FUNC_END(copy_mc_fragile)
#endif /* CONFIG_X86_MCE */
/*
@ -133,9 +131,7 @@ SYM_FUNC_START(copy_mc_enhanced_fast_string)
/* Copy successful. Return zero */
xorl %eax, %eax
RET
SYM_FUNC_END(copy_mc_enhanced_fast_string)
.section .fixup, "ax"
.E_copy:
/*
* On fault %rcx is updated such that the copy instruction could
@ -147,7 +143,7 @@ SYM_FUNC_END(copy_mc_enhanced_fast_string)
movq %rcx, %rax
RET
.previous
_ASM_EXTABLE_TYPE(.L_copy, .E_copy, EX_TYPE_DEFAULT_MCE_SAFE)
SYM_FUNC_END(copy_mc_enhanced_fast_string)
#endif /* !CONFIG_UML */