diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 24 | ||||
| -rw-r--r-- | arch/powerpc/kernel/ftrace.c | 14 | ||||
| -rw-r--r-- | arch/powerpc/kernel/process.c | 9 |
3 files changed, 4 insertions, 43 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 0905c8da90f..66f7ed32848 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -1241,28 +1241,6 @@ _GLOBAL(ftrace_graph_caller) _GLOBAL(return_to_handler) /* need to save return values */ - std r4, -24(r1) - std r3, -16(r1) - std r31, -8(r1) - mr r31, r1 - stdu r1, -112(r1) - - bl ftrace_return_to_handler - nop - - /* return value has real return address */ - mtlr r3 - - ld r1, 0(r1) - ld r4, -24(r1) - ld r3, -16(r1) - ld r31, -8(r1) - - /* Jump back to real return address */ - blr - -_GLOBAL(mod_return_to_handler) - /* need to save return values */ std r4, -32(r1) std r3, -24(r1) /* save TOC */ @@ -1272,7 +1250,7 @@ _GLOBAL(mod_return_to_handler) stdu r1, -112(r1) /* - * We are in a module using the module's TOC. + * We might be called from a module. * Switch to our TOC to run inside the core kernel. */ ld r2, PACATOC(r13) diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index 390311c0f03..abf79213c35 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -510,10 +510,6 @@ int ftrace_disable_ftrace_graph_caller(void) } #endif /* CONFIG_DYNAMIC_FTRACE */ -#ifdef CONFIG_PPC64 -extern void mod_return_to_handler(void); -#endif - /* * Hook the return address and push it in the stack of return addrs * in current thread info. @@ -523,7 +519,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) unsigned long old; int faulted; struct ftrace_graph_ent trace; - unsigned long return_hooker = (unsigned long)&return_to_handler; + unsigned long return_hooker; if (unlikely(ftrace_graph_is_dead())) return; @@ -531,13 +527,7 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr) if (unlikely(atomic_read(¤t->tracing_graph_pause))) return; -#ifdef CONFIG_PPC64 - /* non core kernel code needs to save and restore the TOC */ - if (REGION_ID(self_addr) != KERNEL_REGION_ID) - return_hooker = (unsigned long)&mod_return_to_handler; -#endif - - return_hooker = ppc_function_entry((void *)return_hooker); + return_hooker = ppc_function_entry(return_to_handler); /* * Protect against fault, even if it shouldn't diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 8c2691e445b..f6b82152e7a 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1527,13 +1527,6 @@ void show_stack(struct task_struct *tsk, unsigned long *stack) int curr_frame = current->curr_ret_stack; extern void return_to_handler(void); unsigned long rth = (unsigned long)return_to_handler; - unsigned long mrth = -1; -#ifdef CONFIG_PPC64 - extern void mod_return_to_handler(void); - rth = *(unsigned long *)rth; - mrth = (unsigned long)mod_return_to_handler; - mrth = *(unsigned long *)mrth; -#endif #endif sp = (unsigned long) stack; @@ -1558,7 +1551,7 @@ void show_stack(struct task_struct *tsk, unsigned long *stack) if (!firstframe || ip != lr) { printk("["REG"] ["REG"] %pS", sp, ip, (void *)ip); #ifdef CONFIG_FUNCTION_GRAPH_TRACER - if ((ip == rth || ip == mrth) && curr_frame >= 0) { + if ((ip == rth) && curr_frame >= 0) { printk(" (%pS)", (void *)current->ret_stack[curr_frame].ret); curr_frame--; |