The following commit has been merged into the x86/urgent branch of tip: Commit-ID: d66e9d50ea5cd76b2c4875c758efad665283d7ad Gitweb: https://git.kernel.org/tip/d66e9d50ea5cd76b2c4875c758efad665283d7ad Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Fri, 08 Apr 2022 11:45:56 +02:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Tue, 19 Apr 2022 21:58:48 +02:00 x86,objtool: Explicitly mark idtentry_body()s tail REACHABLE Objtool can figure out that some \cfunc()s are noreturn and then complains about certain instances having unreachable tails: vmlinux.o: warning: objtool: asm_exc_xen_unknown_trap()+0x16: unreachable instruction Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220408094718.441854969@xxxxxxxxxxxxx --- arch/x86/entry/entry_64.S | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 4faac48..73d9585 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -337,6 +337,9 @@ SYM_CODE_END(ret_from_fork) call \cfunc + /* For some configurations \cfunc ends up being a noreturn. */ + REACHABLE + jmp error_return .endm
|