[PATCH] i386: cpu_relax() in crash.c and doublefault.c

Add cpu_relax() to infinite loops in crash.c and doublefault.c.  This is
the safest change.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 4 insertions, 2 deletions

diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c
index 2b0cfce24a61..21dc1bbb8067 100644
--- a/arch/i386/kernel/crash.c
+++ b/arch/i386/kernel/crash.c
@@ -114,7 +114,8 @@ static int crash_nmi_callback(struct pt_regs *regs, int cpu)
         atomic_dec(&waiting_for_crash_ipi);
         /* Assume hlt works */
         halt();
-        for(;;);
+        for (;;)
+                cpu_relax();
 
         return 1;
 }
diff --git a/arch/i386/kernel/doublefault.c b/arch/i386/kernel/doublefault.c
index 5edb1d379add..b4d14c2eb345 100644
--- a/arch/i386/kernel/doublefault.c
+++ b/arch/i386/kernel/doublefault.c
@@ -44,7 +44,8 @@ static void doublefault_fn(void)
                 }
         }
 
-        for (;;) /* nothing */;
+        for (;;)
+                cpu_relax();
 }
 
 struct tss_struct doublefault_tss __cacheline_aligned = {