Commit 3c341b21 authored by Wang Kefeng's avatar Wang Kefeng Committed by Russell King (Oracle)
Browse files

ARM: 9165/1: mm: Provide is_write_fault() 



The function will check whether the fault is caused by a write access,
it will be called in die_kernel_fault() too in next patch, so put it
before the function of die_kernel_fault().

Acked-by: default avatarMarco Elver <elver@google.com>
Signed-off-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
parent 0ba8695e

arch/arm/mm/fault.c

+6 −1
Original line number Diff line number Diff line
@@ -99,6 +99,11 @@ void show_pte(const char *lvl, struct mm_struct *mm, unsigned long addr) 
{ }

#endif					/* CONFIG_MMU */



static inline bool is_write_fault(unsigned int fsr)

{

	return (fsr & FSR_WRITE) && !(fsr & FSR_CM);

}



static void die_kernel_fault(const char *msg, struct mm_struct *mm,

			     unsigned long addr, unsigned int fsr,

			     struct pt_regs *regs)
@@ -261,7 +266,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) 
	if (user_mode(regs))

		flags |= FAULT_FLAG_USER;



	if ((fsr & FSR_WRITE) && !(fsr & FSR_CM)) {

	if (is_write_fault(fsr)) {

		flags |= FAULT_FLAG_WRITE;

		vm_flags = VM_WRITE;

	}