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kernel-ark/arch/mips/include/asm/bug.h

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#ifndef __ASM_BUG_H
#define __ASM_BUG_H
MIPS: bug.h Build fix - include <linux/compiler.h>. In the past this file somehow used to be dragged in. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-06-19 12:51:28 +00:00
#include <linux/compiler.h>
[MIPS] Use conditional traps for BUG_ON on MIPS II and better. This shaves of around 4kB and a few cycles for the average kernel that has CONFIG_BUG enabled. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-16 00:38:50 +00:00
#include <asm/sgidefs.h>
Bugs are now a configuration option. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-19 12:08:04 +00:00
#ifdef CONFIG_BUG
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#include <asm/break.h>
MIPS: Make BUG() __noreturn. Often we do things like put BUG() in the default clause of a case statement. Since it was not declared __noreturn, this could sometimes lead to bogus compiler warnings that variables were used uninitialized. There is a small problem in that we have to put a magic while(1); loop to fool GCC into really thinking it is noreturn. This makes the new BUG() function 3 instructions long instead of just 1, but I think it is worth it as it is now unnecessary to do extra work to silence the 'used uninitialized' warnings. I also re-wrote BUG_ON so that if it is given a constant condition, it just does BUG() instead of loading a constant value in to a register and testing it. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-11-21 01:26:36 +00:00
static inline void __noreturn BUG(void)
{
__asm__ __volatile__("break %0" : : "i" (BRK_BUG));
MIPS: Convert BUG() to use unreachable() Use the new unreachable() macro instead of while(1); Signed-off-by: David Daney <ddaney@caviumnetworks.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> CC: linux-mips@linux-mips.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-12-05 01:44:52 +00:00
unreachable();
MIPS: Make BUG() __noreturn. Often we do things like put BUG() in the default clause of a case statement. Since it was not declared __noreturn, this could sometimes lead to bogus compiler warnings that variables were used uninitialized. There is a small problem in that we have to put a magic while(1); loop to fool GCC into really thinking it is noreturn. This makes the new BUG() function 3 instructions long instead of just 1, but I think it is worth it as it is now unnecessary to do extra work to silence the 'used uninitialized' warnings. I also re-wrote BUG_ON so that if it is given a constant condition, it just does BUG() instead of loading a constant value in to a register and testing it. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-11-21 01:26:36 +00:00
}
Fix weirdness in <asm/bug.h> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 18:32:38 +00:00
#define HAVE_ARCH_BUG
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
[MIPS] Use conditional traps for BUG_ON on MIPS II and better. This shaves of around 4kB and a few cycles for the average kernel that has CONFIG_BUG enabled. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-16 00:38:50 +00:00
#if (_MIPS_ISA > _MIPS_ISA_MIPS1)
MIPS: Make BUG() __noreturn. Often we do things like put BUG() in the default clause of a case statement. Since it was not declared __noreturn, this could sometimes lead to bogus compiler warnings that variables were used uninitialized. There is a small problem in that we have to put a magic while(1); loop to fool GCC into really thinking it is noreturn. This makes the new BUG() function 3 instructions long instead of just 1, but I think it is worth it as it is now unnecessary to do extra work to silence the 'used uninitialized' warnings. I also re-wrote BUG_ON so that if it is given a constant condition, it just does BUG() instead of loading a constant value in to a register and testing it. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-11-21 01:26:36 +00:00
static inline void __BUG_ON(unsigned long condition)
{
if (__builtin_constant_p(condition)) {
if (condition)
BUG();
else
return;
}
__asm__ __volatile__("tne $0, %0, %1"
: : "r" (condition), "i" (BRK_BUG));
}
#define BUG_ON(C) __BUG_ON((unsigned long)(C))
[MIPS] Use conditional traps for BUG_ON on MIPS II and better. This shaves of around 4kB and a few cycles for the average kernel that has CONFIG_BUG enabled. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-16 00:38:50 +00:00
#define HAVE_ARCH_BUG_ON
#endif /* _MIPS_ISA > _MIPS_ISA_MIPS1 */
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
#endif
Bugs are now a configuration option. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-19 12:08:04 +00:00
Fix build for CONFIG_BUG=n. Yes, bugs are now a compile time option ;-) Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-19 17:05:09 +00:00
#include <asm-generic/bug.h>
Bugs are now a configuration option. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-05-19 12:08:04 +00:00
#endif /* __ASM_BUG_H */
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