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Commit 9b355897 authored by Jan Beulich's avatar Jan Beulich Committed by Andi Kleen
Browse files

[PATCH] x86: simplify notify_page_fault() 



Remove all parameters from this function that aren't really variable.

Signed-off-by: default avatarJan Beulich <jbeulich@novell.com>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
parent 6a051565

arch/i386/mm/fault.c

+8 −10
Original line number Diff line number Diff line
@@ -46,17 +46,17 @@ int unregister_page_fault_notifier(struct notifier_block *nb) 
}

EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);



static inline int notify_page_fault(enum die_val val, const char *str,

			struct pt_regs *regs, long err, int trap, int sig)

static inline int notify_page_fault(struct pt_regs *regs, long err)

{

	struct die_args args = {

		.regs = regs,

		.str = str,

		.str = "page fault",

		.err = err,

		.trapnr = trap,

		.signr = sig

		.trapnr = 14,

		.signr = SIGSEGV

	};

	return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);

	return atomic_notifier_call_chain(&notify_page_fault_chain,

	                                  DIE_PAGE_FAULT, &args);

}



/*
@@ -327,8 +327,7 @@ fastcall void __kprobes do_page_fault(struct pt_regs *regs, 
	if (unlikely(address >= TASK_SIZE)) {

		if (!(error_code & 0x0000000d) && vmalloc_fault(address) >= 0)

			return;

		if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,

						SIGSEGV) == NOTIFY_STOP)

		if (notify_page_fault(regs, error_code) == NOTIFY_STOP)

			return;

		/*

		 * Don't take the mm semaphore here. If we fixup a prefetch
@@ -337,8 +336,7 @@ fastcall void __kprobes do_page_fault(struct pt_regs *regs, 
		goto bad_area_nosemaphore;

	}



	if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,

					SIGSEGV) == NOTIFY_STOP)

	if (notify_page_fault(regs, error_code) == NOTIFY_STOP)

		return;



	/* It's safe to allow irq's after cr2 has been saved and the vmalloc

arch/x86_64/mm/fault.c

+8 −10
Original line number Diff line number Diff line
@@ -56,17 +56,17 @@ int unregister_page_fault_notifier(struct notifier_block *nb) 
}

EXPORT_SYMBOL_GPL(unregister_page_fault_notifier);



static inline int notify_page_fault(enum die_val val, const char *str,

			struct pt_regs *regs, long err, int trap, int sig)

static inline int notify_page_fault(struct pt_regs *regs, long err)

{

	struct die_args args = {

		.regs = regs,

		.str = str,

		.str = "page fault",

		.err = err,

		.trapnr = trap,

		.signr = sig

		.trapnr = 14,

		.signr = SIGSEGV

	};

	return atomic_notifier_call_chain(&notify_page_fault_chain, val, &args);

	return atomic_notifier_call_chain(&notify_page_fault_chain,

	                                  DIE_PAGE_FAULT, &args);

}



/* Sometimes the CPU reports invalid exceptions on prefetch.
@@ -355,8 +355,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, 
			if (vmalloc_fault(address) >= 0)

				return;

		}

		if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,

						SIGSEGV) == NOTIFY_STOP)

		if (notify_page_fault(regs, error_code) == NOTIFY_STOP)

			return;

		/*

		 * Don't take the mm semaphore here. If we fixup a prefetch
@@ -365,8 +364,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, 
		goto bad_area_nosemaphore;

	}



	if (notify_page_fault(DIE_PAGE_FAULT, "page fault", regs, error_code, 14,

					SIGSEGV) == NOTIFY_STOP)

	if (notify_page_fault(regs, error_code) == NOTIFY_STOP)

		return;



	if (likely(regs->eflags & X86_EFLAGS_IF))