sparc64: perf: Use UREG_FP rather than UREG_I6

perf walks userspace callchains by following frame pointers. Use the
UREG_FP macro to make it clearer that the %fp is being used.

Signed-off-by: David Ahern <david.ahern@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index a665e3f8c6c6..689db65f8529 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1756,7 +1756,7 @@ static void perf_callchain_user_64(struct perf_callchain_entry *entry,
 {
         unsigned long ufp;
 
-        ufp = regs->u_regs[UREG_I6] + STACK_BIAS;
+        ufp = regs->u_regs[UREG_FP] + STACK_BIAS;
         do {
                 struct sparc_stackf __user *usf;
                 struct sparc_stackf sf;
@@ -1780,7 +1780,7 @@ static void perf_callchain_user_32(struct perf_callchain_entry *entry,
 {
         unsigned long ufp;
 
-        ufp = regs->u_regs[UREG_I6] & 0xffffffffUL;
+        ufp = regs->u_regs[UREG_FP] & 0xffffffffUL;
         do {
                 unsigned long pc;