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    Subject[PATCH 5.19 113/365] um: Add missing apply_returns()
    Date
    From: Peter Zijlstra <peterz@infradead.org>

    commit 637285e7f8d6da70a70c64e7895cb0672357a1f7 upstream.

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

    Fixes: 15e67227c49a ("x86: Undo return-thunk damage")
    Reported-by: Randy Dunlap <rdunlap@infradead.org)
    Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    Signed-off-by: Richard Weinberger <richard@nod.at>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    arch/um/kernel/um_arch.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/arch/um/kernel/um_arch.c
    +++ b/arch/um/kernel/um_arch.c
    @@ -444,6 +444,10 @@ void apply_returns(s32 *start, s32 *end)
    {
    }

    +void apply_returns(s32 *start, s32 *end)
    +{
    +}
    +
    void apply_alternatives(struct alt_instr *start, struct alt_instr *end)
    {
    }

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