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[PATCH] i386: Account spinlocks to the caller during profiling for !FP kernels

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This ports the algorithm from x86-64 (with improvements) to i386.
Previously this only worked for frame pointer enabled kernels.
But spinlocks have a very simple stack frame that can be manually
analyzed. Do this.

Signed-off-by: Andi Kleen <[email protected]>
This commit is contained in:
Andi Kleen 2006-09-26 10:52:28 +02:00 • committed by Andi Kleen
commit 0cb91a2293
3 changed files with 24 additions and 8 deletions
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4
include/asm-i386/ptrace.h
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@ -80,11 +80,7 @@ static inline int user_mode_vm(struct pt_regs *regs)
return ((regs->xcs & 3) | (regs->eflags & VM_MASK)) != 0;
}
#define instruction_pointer(regs) ((regs)->eip)
#if defined(CONFIG_SMP) && defined(CONFIG_FRAME_POINTER)
extern unsigned long profile_pc(struct pt_regs *regs);
#else
#define profile_pc(regs) instruction_pointer(regs)
#endif
#endif /* __KERNEL__ */
#endif