ARM: 7068/1: process: change from __backtrace to dump_stack in show_regs

Currently, show_regs calls __backtrace which does
nothing if CONFIG_FRAME_POINTER is not set. Switch to
dump_stack which handles both CONFIG_FRAME_POINTER and
CONFIG_ARM_UNWIND correctly.

__backtrace is now superseded by dump_stack in general
and show_regs was the last caller so remove __backtrace
as well.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 4adf71b..09cdfe6 100644 (file)
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -98,7 +98,6 @@ void hook_ifault_code(int nr, int (*fn)(unsigned long, unsigned int,
 #define xchg(ptr,x) \
        ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
 
-extern asmlinkage void __backtrace(void);
 extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
 
 struct mm_struct;

diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index aeef960..8e3c6f1 100644 (file)
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -49,9 +49,6 @@ extern void __aeabi_ulcmp(void);
 
 extern void fpundefinstr(void);
 
-
-EXPORT_SYMBOL(__backtrace);
-
        /* platform dependent support */
 EXPORT_SYMBOL(__udelay);
 EXPORT_SYMBOL(__const_udelay);

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 1a347f4..fd08140 100644 (file)
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -319,7 +319,7 @@ void show_regs(struct pt_regs * regs)
        printk("\n");
        printk("Pid: %d, comm: %20s\n", task_pid_nr(current), current->comm);
        __show_regs(regs);
-       __backtrace();
+       dump_stack();
 }
 
 ATOMIC_NOTIFIER_HEAD(thread_notify_head);

diff --git a/arch/arm/lib/backtrace.S b/arch/arm/lib/backtrace.S
index a673297..cd07b58 100644 (file)
--- a/arch/arm/lib/backtrace.S
+++ b/arch/arm/lib/backtrace.S
@@ -22,15 +22,10 @@
 #define mask   r7
 #define offset r8
 
-ENTRY(__backtrace)
-               mov     r1, #0x10
-               mov     r0, fp
-
 ENTRY(c_backtrace)
 
 #if !defined(CONFIG_FRAME_POINTER) || !defined(CONFIG_PRINTK)
                mov     pc, lr
-ENDPROC(__backtrace)
 ENDPROC(c_backtrace)
 #else
                stmfd   sp!, {r4 - r8, lr}      @ Save an extra register so we have a location...
@@ -107,7 +102,6 @@ for_each_frame:     tst     frame, mask             @ Check for address exceptions
                mov     r1, frame
                bl      printk
 no_frame:      ldmfd   sp!, {r4 - r8, pc}
-ENDPROC(__backtrace)
 ENDPROC(c_backtrace)
                
                .pushsection __ex_table,"a"