From: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> [ Upstream commit 3a6ab4bcc52263dd5b1d2fd2e4ce95a38c798b4d ] After an objtool improvement, it's complaining about the CLAC in copy_user_handle_tail(): arch/x86/lib/copy_user_64.o: warning: objtool: .altinstr_replacement+0x12: redundant UACCESS disable arch/x86/lib/copy_user_64.o: warning: objtool: copy_user_handle_tail()+0x6: (alt) arch/x86/lib/copy_user_64.o: warning: objtool: copy_user_handle_tail()+0x2: (alt) arch/x86/lib/copy_user_64.o: warning: objtool: copy_user_handle_tail()+0x0: <=== (func) copy_user_handle_tail() is incorrectly marked as a callable function, so objtool is rightfully concerned about the CLAC with no corresponding STAC. Remove the ELF function annotation. The copy_user_handle_tail() code path is already verified by objtool because it's jumped to by other callable asm code (which does the corresponding STAC). Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/6b6e436774678b4b9873811ff023bd29935bee5b.1563413318.git.jpoimboe@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- arch/x86/lib/copy_user_64.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/lib/copy_user_64.S b/arch/x86/lib/copy_user_64.S index 378a1f70ae7d..4fe1601dbc5d 100644 --- a/arch/x86/lib/copy_user_64.S +++ b/arch/x86/lib/copy_user_64.S @@ -239,7 +239,7 @@ copy_user_handle_tail: ret _ASM_EXTABLE_UA(1b, 2b) -ENDPROC(copy_user_handle_tail) +END(copy_user_handle_tail) /* * copy_user_nocache - Uncached memory copy with exception handling -- 2.20.1
