Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
os
linux
[PATCH] i386: clean up user_mode macros
- make the new user_mode() return 0 or 1 (same as x86_64)
- remove conditional jump from user_mode_vm() it's called every timer
tick on each CPU on SMP)
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
authored by Chuck Ebbert and committed by Linus Torvalds ae6578fe 4d7de66e
+10
-3
include/asm-i386/ptrace.h
+10
-3
include/asm-i386/ptrace.h
···
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#ifdef __KERNEL__
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struct task_struct;
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extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
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-
#define user_mode(regs) (3 & (regs)->xcs)
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-
#define user_mode_vm(regs) ((VM_MASK & (regs)->eflags) || user_mode(regs))
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#define instruction_pointer(regs) ((regs)->eip)
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#if defined(CONFIG_SMP) && defined(CONFIG_FRAME_POINTER)
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extern unsigned long profile_pc(struct pt_regs *regs);
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#else
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#define profile_pc(regs) instruction_pointer(regs)
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#endif
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-
#endif
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#endif
···
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#ifdef __KERNEL__
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struct task_struct;
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extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code);
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+
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+
static inline int user_mode(struct pt_regs *regs)
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{
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return (regs->xcs & 3) != 0;
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+
}
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+
static inline int user_mode_vm(struct pt_regs *regs)
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{
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return ((regs->xcs & 3) | (regs->eflags & VM_MASK)) != 0;
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+
}
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#define instruction_pointer(regs) ((regs)->eip)
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#if defined(CONFIG_SMP) && defined(CONFIG_FRAME_POINTER)
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extern unsigned long profile_pc(struct pt_regs *regs);
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#else
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#define profile_pc(regs) instruction_pointer(regs)
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#endif
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+
#endif /* __KERNEL__ */
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#endif