x86: hlt on early crash

H. Peter Anvin <hpa@zytor.com> wrote:

> It probably should actually HLT, to avoid sucking power, and stressing
> the thermal system.  We're dead at this point, and the early 486's
> which had problems with HLT will lock up - we don't care.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 4 insertions, 2 deletions

diff --git a/arch/x86/boot/compressed/misc_32.c b/arch/x86/boot/compressed/misc_32.c
index 288e16283ef9..9103652058c4 100644
--- a/arch/x86/boot/compressed/misc_32.c
+++ b/arch/x86/boot/compressed/misc_32.c
@@ -339,7 +339,8 @@ static void error(char *x)
         putstr(x);
         putstr("\n\n -- System halted");
 
-        while(1);       /* Halt */
+        while (1)
+                asm("hlt");
 }
 
 asmlinkage void decompress_kernel(void *rmode, unsigned long end,
diff --git a/arch/x86/boot/compressed/misc_64.c b/arch/x86/boot/compressed/misc_64.c
index 7d8338e21b00..8494f0dcff21 100644
--- a/arch/x86/boot/compressed/misc_64.c
+++ b/arch/x86/boot/compressed/misc_64.c
@@ -338,7 +338,8 @@ static void error(char *x)
         putstr(x);
         putstr("\n\n -- System halted");
 
-        while(1);       /* Halt */
+        while (1)
+                asm("hlt");
 }
 
 asmlinkage void decompress_kernel(void *rmode, unsigned long heap,