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authorMiroslav Benes <mbenes@suse.cz>2019-06-11 16:13:18 +0200
committerPetr Mladek <pmladek@suse.com>2019-06-20 15:43:31 +0200
commit380178ef7fde58f2040788a1bab972ce4867ac58 (patch)
tree84e8ed012b33e98667b20dac7e5c44043fda9101 /kernel/stacktrace.c
parentf36e664516b02c7f54bbd3094bab047d54bb5488 (diff)
stacktrace: Remove weak version of save_stack_trace_tsk_reliable()
Recent rework of stack trace infrastructure introduced a new set of helpers for common stack trace operations (commit e9b98e162aa5 ("stacktrace: Provide helpers for common stack trace operations") and related). As a result, save_stack_trace_tsk_reliable() is not directly called anywhere. Livepatch, currently the only user of the reliable stack trace feature, now calls stack_trace_save_tsk_reliable(). When CONFIG_HAVE_RELIABLE_STACKTRACE is set and depending on CONFIG_ARCH_STACKWALK, stack_trace_save_tsk_reliable() calls either arch_stack_walk_reliable() or mentioned save_stack_trace_tsk_reliable(). x86_64 defines the former, ppc64le the latter. All other architectures do not have HAVE_RELIABLE_STACKTRACE and include/linux/stacktrace.h defines -ENOSYS returning version for them. In short, stack_trace_save_tsk_reliable() returning -ENOSYS defined in include/linux/stacktrace.h serves the same purpose as the old weak version of save_stack_trace_tsk_reliable() which is therefore no longer needed. Signed-off-by: Miroslav Benes <mbenes@suse.cz> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'kernel/stacktrace.c')
-rw-r--r--kernel/stacktrace.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c
index 27bafc1e271e..319e7fcf3083 100644
--- a/kernel/stacktrace.c
+++ b/kernel/stacktrace.c
@@ -254,14 +254,6 @@ save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
WARN_ONCE(1, KERN_INFO "save_stack_trace_regs() not implemented yet.\n");
}
-__weak int
-save_stack_trace_tsk_reliable(struct task_struct *tsk,
- struct stack_trace *trace)
-{
- WARN_ONCE(1, KERN_INFO "save_stack_tsk_reliable() not implemented yet.\n");
- return -ENOSYS;
-}
-
/**
* stack_trace_save - Save a stack trace into a storage array
* @store: Pointer to storage array

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