Merge branch 'tracing/core' into tracing/hw-breakpoints

Conflicts:
	arch/Kconfig
	kernel/trace/trace.h

Merge reason: resolve the conflicts, plus adopt to the new
              ring-buffer APIs.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 3 deletions

diff --git a/arch/powerpc/sysdev/qe_lib/qe.c b/arch/powerpc/sysdev/qe_lib/qe.c
index b28b0e512d67..237e3654f48c 100644
--- a/arch/powerpc/sysdev/qe_lib/qe.c
+++ b/arch/powerpc/sysdev/qe_lib/qe.c
@@ -112,6 +112,7 @@ int qe_issue_cmd(u32 cmd, u32 device, u8 mcn_protocol, u32 cmd_input)
 {
         unsigned long flags;
         u8 mcn_shift = 0, dev_shift = 0;
+        u32 ret;
 
         spin_lock_irqsave(&qe_lock, flags);
         if (cmd == QE_RESET) {
@@ -139,11 +140,13 @@ int qe_issue_cmd(u32 cmd, u32 device, u8 mcn_protocol, u32 cmd_input)
         }
 
         /* wait for the QE_CR_FLG to clear */
-        while(in_be32(&qe_immr->cp.cecr) & QE_CR_FLG)
-                cpu_relax();
+        ret = spin_event_timeout((in_be32(&qe_immr->cp.cecr) & QE_CR_FLG) == 0,
+                           100, 0);
+        /* On timeout (e.g. failure), the expression will be false (ret == 0),
+           otherwise it will be true (ret == 1). */
         spin_unlock_irqrestore(&qe_lock, flags);
 
-        return 0;
+        return ret == 1;
 }
 EXPORT_SYMBOL(qe_issue_cmd);