From 867f7fb3ebb831970847b179e7df5a9ab10da16d Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Tue, 11 Nov 2008 11:18:14 +0100 Subject: [PATCH] tracing, x86: function return tracer, fix assembly constraints fix: arch/x86/kernel/ftrace.c: Assembler messages: arch/x86/kernel/ftrace.c:140: Error: missing ')' arch/x86/kernel/ftrace.c:140: Error: junk `(%ebp))' after expression arch/x86/kernel/ftrace.c:141: Error: missing ')' arch/x86/kernel/ftrace.c:141: Error: junk `(%ebp))' after expression the [parent_replaced] is used in an =rm fashion, so that constraint is correct in isolation - but [parent_old] aliases register %0 and uses it in an addressing mode that is only valid with registers - so change the constraint from =rm to =r. This fixes the build failure. Signed-off-by: Ingo Molnar --- arch/x86/kernel/ftrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c index d68033bba223..9b2325a4d53c 100644 --- a/arch/x86/kernel/ftrace.c +++ b/arch/x86/kernel/ftrace.c @@ -151,7 +151,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) " .long 2b, 3b\n" ".previous\n" - : [parent_replaced] "=rm" (parent), [old] "=r" (old), + : [parent_replaced] "=r" (parent), [old] "=r" (old), [faulted] "=r" (faulted) : [parent_old] "0" (parent), [return_hooker] "r" (return_hooker) : "memory" -- 2.20.1