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um: Add missing apply_returns()

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commit 564d998106 upstream.

Implement apply_returns() stub for UM, just like all the other patching
routines.

Fixes: 15e67227c4 ("x86: Undo return-thunk damage")
Reported-by: Randy Dunlap <rdunlap@infradead.org)
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/Ys%2Ft45l%2FgarIrD0u@worktop.programming.kicks-ass.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Zijlstra 2022-07-14 12:20:19 +02:00 • committed by Justin Hammond
parent ba1cae8e8e
commit 37e95ded40
1 changed files with 4 additions and 0 deletions
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4
arch/um/kernel/um_arch.c
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@ -425,6 +425,10 @@ void apply_retpolines(s32 *start, s32 *end)
{
}
void apply_returns(s32 *start, s32 *end)
{
}
void apply_alternatives(struct alt_instr *start, struct alt_instr *end)
{
}