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x86: Unspaghettize do_general_protection() 

There is some unnatural label based layout in this function.
Convert the unnecessary goto to readable conditional blocks.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2012-09-24 21:05:52 +02:00
parent bf5a3c13b9
commit ef3f628872
1 changed files with 16 additions and 22 deletions
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38
arch/x86/kernel/traps.c
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@ -258,13 +258,25 @@ do_general_protection(struct pt_regs *regs, long error_code)
conditional_sti(regs);
#ifdef CONFIG_X86_32
if (regs->flags & X86_VM_MASK)
goto gp_in_vm86;
if (regs->flags & X86_VM_MASK) {
local_irq_enable();
handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
return;
}
#endif
tsk = current;
if (!user_mode(regs))
goto gp_in_kernel;
if (!user_mode(regs)) {
if (fixup_exception(regs))
return;
tsk->thread.error_code = error_code;
tsk->thread.trap_nr = X86_TRAP_GP;
if (!notify_die(DIE_GPF, "general protection fault", regs, error_code,
X86_TRAP_GP, SIGSEGV) == NOTIFY_STOP)
die("general protection fault", regs, error_code);
return;
}
tsk->thread.error_code = error_code;
tsk->thread.trap_nr = X86_TRAP_GP;
@ -280,24 +292,6 @@ do_general_protection(struct pt_regs *regs, long error_code)
force_sig(SIGSEGV, tsk);
return;
#ifdef CONFIG_X86_32
gp_in_vm86:
local_irq_enable();
handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
return;
#endif
gp_in_kernel:
if (fixup_exception(regs))
return;
tsk->thread.error_code = error_code;
tsk->thread.trap_nr = X86_TRAP_GP;
if (notify_die(DIE_GPF, "general protection fault", regs, error_code,
X86_TRAP_GP, SIGSEGV) == NOTIFY_STOP)
return;
die("general protection fault", regs, error_code);
}
/* May run on IST stack. */