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x86: Prepare inline-asm for straight-line-speculation

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commit b17c2baa305cccbd16bafa289fd743cc2db77966 upstream.

Replace all ret/retq instructions with ASM_RET in preparation of
making it more than a single instruction.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211204134907.964635458@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 5.10: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Zijlstra
2021-12-04 14:43:41 +01:00
committed by Greg Kroah-Hartman
parent 3c91e22576
commit 277f4ddc36
11 changed files with 18 additions and 13 deletions
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4
samples/ftrace/ftrace-direct-modify.c
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@@ -31,7 +31,7 @@ asm (
" call my_direct_func1\n"
" leave\n"
" .size my_tramp1, .-my_tramp1\n"
" ret\n"
ASM_RET
" .type my_tramp2, @function\n"
" .globl my_tramp2\n"
" my_tramp2:"
@@ -39,7 +39,7 @@ asm (
" movq %rsp, %rbp\n"
" call my_direct_func2\n"
" leave\n"
" ret\n"
ASM_RET
" .size my_tramp2, .-my_tramp2\n"
" .popsection\n"
);