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| author | Wang Kefeng <wangkefeng.wang@huawei.com> | 2021-12-03 10:26:32 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2021-12-17 12:34:37 +0100 |
| commit | 3c341b217414d1d63718438f2b2fa588cf2b73fc (patch) | |
| tree | a339e5c295aec4ff8e8c0aae2b1c825909b264be /arch/arm/mm/fault.c | |
| parent | ARM: 9164/1: mm: Provide set_memory_valid() (diff) | |
| download | linux-3c341b217414d1d63718438f2b2fa588cf2b73fc.tar.xz linux-3c341b217414d1d63718438f2b2fa588cf2b73fc.zip | |
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: Marco Elver <elver@google.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/mm/fault.c')
| -rw-r--r-- | arch/arm/mm/fault.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 013921a5909b..1d41e8fad4f3 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -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; } |