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authorPekka Enberg <penberg@kernel.org>2020-08-25 19:42:54 +0300
committerPalmer Dabbelt <palmerdabbelt@google.com>2020-09-15 18:46:04 -0700
commit6747430197ed414be37e843064a7f365f4d1fd57 (patch)
treec375d5ab5f89bd62656e5467cde41e121c940bb4 /arch/riscv
parent7a75f3d47a0b1be6eeb67d14e4003b2b91f8aa59 (diff)
riscv/mm/fault: Move FAULT_FLAG_WRITE handling in do_page_fault()
Let's handle the translation of EXC_STORE_PAGE_FAULT to FAULT_FLAG_WRITE once before looking up the VMA. This makes it easier to extract access error logic in the next patch. Signed-off-by: Pekka Enberg <penberg@kernel.org> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv')
-rw-r--r--arch/riscv/mm/fault.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index 3b430fb18de3..bdc70d3d507f 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -208,6 +208,9 @@ asmlinkage void do_page_fault(struct pt_regs *regs)
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, addr);
+ if (cause == EXC_STORE_PAGE_FAULT)
+ flags |= FAULT_FLAG_WRITE;
+
retry:
mmap_read_lock(mm);
vma = find_vma(mm, addr);
@@ -251,7 +254,6 @@ good_area:
bad_area(regs, mm, code, addr);
return;
}
- flags |= FAULT_FLAG_WRITE;
break;
default:
panic("%s: unhandled cause %lu", __func__, cause);