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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2019-01-28 10:33:08 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2019-05-02 14:54:11 +0300
commit78c98f9074135d3dab4e39544e0a537f92388fce (patch)
tree6f6d96e8e0911fe2aa27ec89cca52d56d3ed6f7e /arch/s390/kernel/irq.c
parent1c705ad5efae9c712e763a47fbcc95b87b7347d2 (diff)
downloadlinux-78c98f9074135d3dab4e39544e0a537f92388fce.tar.xz
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/kernel/irq.c')
-rw-r--r--arch/s390/kernel/irq.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 150964f91183..8371855042dc 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -26,6 +26,7 @@
#include <asm/lowcore.h>
#include <asm/irq.h>
#include <asm/hw_irq.h>
+#include <asm/stacktrace.h>
#include "entry.h"
DEFINE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);