Re: [x86] BUG: unable to handle kernel paging request at 00740060

From: Jakub Jelinek
Date: Thu Oct 10 2013 - 04:05:51 EST


On Thu, Oct 10, 2013 at 08:51:04AM +0200, Jakub Jelinek wrote:
> @@ -8,6 +8,7 @@ foo (int a, int b)
> asm volatile goto ("bts $1, %0; jc %l[lab]" : : "m" (b) : "memory" : lab);
> return 0;
> lab:
> + asm ("");
> return 0;
> }

Or alternatively put the asm (""); right after asm goto,
asm volatile goto ("bts $1, %0; jc %l[lab]" : : "m" (b) : "memory" : lab);
asm ("");
return ...;
lab;
return ...;
What generates better code remains to be tested. In any case, please
conditionalize the hacks on non-fixed compilers once the fix is released.

Jakub
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