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s390/ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR

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Make the call chain more reliable by tagging the ftrace stack entries
with the stack pointer that is associated with the return address.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2019-02-18 16:51:28 +01:00
parent 78c98f9074
commit ec7bf4789d
5 changed files with 11 additions and 8 deletions
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arch/s390/kernel/entry.h
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@@ -65,7 +65,7 @@ int setup_profiling_timer(unsigned int multiplier);
void __init time_init(void);
int pfn_is_nosave(unsigned long);
void s390_early_resume(void);
unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip);
unsigned long prepare_ftrace_return(unsigned long parent, unsigned long sp, unsigned long ip);
struct s390_mmap_arg_struct;
struct fadvise64_64_args;