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

[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
......@@ -770,7 +770,7 @@ int sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
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 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
#endif
EXPORT_SYMBOL(validate_sp);
unsigned long get_wchan(struct task_struct *p)
{
unsigned long ip, sp;
......
......@@ -251,6 +251,10 @@ static inline unsigned long __pack_fe01(unsigned int fpmode)
#define cpu_relax() barrier()
#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.
*/
......
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