In-Reply-To: <[email protected]>
On Fri, 28 Apr 2006 14:54:40 +0200, Mikael Pettersson wrote:
> Running an FP exception using user-space application
> (the runtime system for the Erlang programming language
> in my case) on an Athlon64 with a 32-bit 2.6.17-rc3 kernel
> quickly results in a complete system hang: mouse is dead,
> keyboard is dead, the network doesn't reply to pings.
> Had to reboot via the power switch to get the machine back.
>
> This happended twice in a row. With 2.6.17-rc2 things
> work fine like they always have before.
This should fix it... please test.
Signed-off-by: Chuck Ebbert <[email protected]>
--- 2.6.17-rc3-d4.orig/include/asm-i386/i387.h
+++ 2.6.17-rc3-d4/include/asm-i386/i387.h
@@ -58,13 +58,13 @@ static inline void __save_init_fpu( stru
alternative_input(
"fnsave %[fx] ;fwait;" GENERIC_NOP8 GENERIC_NOP4,
"fxsave %[fx]\n"
- "bt $7,%[fsw] ; jc 1f ; fnclex\n1:",
+ "bt $7,%[fsw] ; jnc 1f ; fnclex\n1:",
X86_FEATURE_FXSR,
[fx] "m" (tsk->thread.i387.fxsave),
[fsw] "m" (tsk->thread.i387.fxsave.swd) : "memory");
/* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception
is pending. Clear the x87 state here by setting it to fixed
- values. __per_cpu_offset[0] is a random variable that should be in L1 */
+ values. safe_address is a random variable that should be in L1 */
alternative_input(
GENERIC_NOP8 GENERIC_NOP2,
"emms\n\t" /* clear stack tags */
--
Chuck
"Penguins don't come from next door, they come from the Antarctic!"
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