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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2019-01-28 08:33:08 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2019-05-02 13:54:11 +0200
commit78c98f9074135d3dab4e39544e0a537f92388fce (patch)
tree6f6d96e8e0911fe2aa27ec89cca52d56d3ed6f7e /arch/s390/mm
parent1c705ad5efae9c712e763a47fbcc95b87b7347d2 (diff)
downloadlinux-78c98f9074135d3dab4e39544e0a537f92388fce.tar.bz2
s390/unwind: introduce stack unwind API
Rework the dump_trace() stack unwinder interface to support different unwinding algorithms. The new interface looks like this: struct unwind_state state; unwind_for_each_frame(&state, task, regs, start_stack) do_something(state.sp, state.ip, state.reliable); The unwind_bc.c file contains the implementation for the classic back-chain unwinder. One positive side effect of the new code is it now handles ftraced functions gracefully. It prints the real name of the return function instead of 'return_to_handler'. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
-rw-r--r--arch/s390/mm/maccess.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c
index 97b3ee53852b..818deeb1ebc3 100644
--- a/arch/s390/mm/maccess.c
+++ b/arch/s390/mm/maccess.c
@@ -16,6 +16,7 @@
#include <linux/cpu.h>
#include <asm/ctl_reg.h>
#include <asm/io.h>
+#include <asm/stacktrace.h>
static notrace long s390_kernel_write_odd(void *dst, const void *src, size_t size)
{