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riscv/mm/fault: Move FAULT_FLAG_WRITE handling in do_page_fault()

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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>
This commit is contained in:
Pekka Enberg 2020-08-25 19:42:54 +03:00 committed by Palmer Dabbelt
parent 7a75f3d47a
commit 6747430197
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GPG key ID: 2E1319F35FBB1889
1 changed files with 3 additions and 1 deletions
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4
arch/riscv/mm/fault.c
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@ -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 @@ asmlinkage void do_page_fault(struct pt_regs *regs)
bad_area(regs, mm, code, addr);
return;
}
flags |= FAULT_FLAG_WRITE;
break;
default:
panic("%s: unhandled cause %lu", __func__, cause);