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Commit 2f25194d authored by Anton Blanchard's avatar Anton Blanchard Committed by Paul Mackerras
Browse files

[PATCH] powerpc: export validate_sp for oprofile calltrace 



Export validate_sp so we can use it in the oprofile calltrace code.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 72533db0

arch/powerpc/kernel/process.c

+3 −1
Original line number Original line Diff line number Diff line
@@ -770,7 +770,7 @@ out: 
	return error;

	return error;

}

}





static int validate_sp(unsigned long sp, struct task_struct *p,

int validate_sp(unsigned long sp, struct task_struct *p,

		       unsigned long nbytes)

		       unsigned long nbytes)

{

{

	unsigned long stack_page = (unsigned long)task_stack_page(p);

	unsigned long stack_page = (unsigned long)task_stack_page(p);
@@ -808,6 +808,8 @@ static int validate_sp(unsigned long sp, struct task_struct *p, 
#define FRAME_MARKER	2

#define FRAME_MARKER	2

#endif

#endif





EXPORT_SYMBOL(validate_sp);



unsigned long get_wchan(struct task_struct *p)

unsigned long get_wchan(struct task_struct *p)

{

{

	unsigned long ip, sp;

	unsigned long ip, sp;

include/asm-powerpc/processor.h

+4 −0
Original line number Original line Diff line number Diff line
@@ -251,6 +251,10 @@ static inline unsigned long __pack_fe01(unsigned int fpmode) 
#define cpu_relax()	barrier()

#define cpu_relax()	barrier()

#endif

#endif





/* Check that a certain kernel stack pointer is valid in task_struct p */

int validate_sp(unsigned long sp, struct task_struct *p,

                       unsigned long nbytes);



/*

/*

 * Prefetch macros.

 * Prefetch macros.

 */

 */