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um: fix call tracer and bug handler

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Commit 1de1502c ("x86, um: now we can get rid of trivial uml headers")
removed accidentally bug.h which broke UML's call tracer and bug
handler.

Without asm-generic/bug.h UML uses BUG() from arch/x86/ which makes use
of ud2.  UML cannot use ud2, it raises SIGILL in user mode.  As UML has
a different stack for handling signals the call trace will be cut off.

Signed-off-by: Richard Weinberger <richard@nod.at>
Reported-by: Sergei Trofimovich <slyich@gmail.com>
Tested-by: Sergei Trofimovich <slyich@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Richard Weinberger 2011-04-14 15:22:17 -07:00 committed by Linus Torvalds
parent ed5afeaf42
commit 6d56dad3ae
1 changed files with 6 additions and 0 deletions
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6
arch/um/include/asm/bug.h Normal file
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@ -0,0 +1,6 @@
#ifndef __UM_BUG_H
#define __UM_BUG_H
#include <asm-generic/bug.h>
#endif