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| author | Matthew Wilcox (Oracle) <[email protected]> | 2023-07-24 18:54:01 +0000 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2023-08-18 17:12:50 +0000 |
| commit | 284e05920498788c5df1a7dd6424adb426498e1c (patch) | |
| tree | 0d7ba33616091d40551d1c74acde80ca25664afb /arch/riscv/mm/fault.c | |
| parent | mm/mmap: change vma iteration order in do_vmi_align_munmap() (diff) | |
| download | kernel-284e05920498788c5df1a7dd6424adb426498e1c.tar.gz kernel-284e05920498788c5df1a7dd6424adb426498e1c.zip | |
mm: remove CONFIG_PER_VMA_LOCK ifdefs
Patch series "Handle most file-backed faults under the VMA lock", v3.
This patchset adds the ability to handle page faults on parts of files
which are already in the page cache without taking the mmap lock.
This patch (of 10):
Provide lock_vma_under_rcu() when CONFIG_PER_VMA_LOCK is not defined to
eliminate ifdefs in the users.
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Reviewed-by: Suren Baghdasaryan <[email protected]>
Cc: Punit Agrawal <[email protected]>
Cc: Arjun Roy <[email protected]>
Cc: Eric Dumazet <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'arch/riscv/mm/fault.c')
| -rw-r--r-- | arch/riscv/mm/fault.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 6ea2cce4cc17..046732fcb48c 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -283,7 +283,6 @@ void handle_page_fault(struct pt_regs *regs) flags |= FAULT_FLAG_WRITE; else if (cause == EXC_INST_PAGE_FAULT) flags |= FAULT_FLAG_INSTRUCTION; -#ifdef CONFIG_PER_VMA_LOCK if (!(flags & FAULT_FLAG_USER)) goto lock_mmap; @@ -311,7 +310,6 @@ void handle_page_fault(struct pt_regs *regs) return; } lock_mmap: -#endif /* CONFIG_PER_VMA_LOCK */ retry: vma = lock_mm_and_find_vma(mm, addr, regs); @@ -368,9 +366,7 @@ retry: mmap_read_unlock(mm); -#ifdef CONFIG_PER_VMA_LOCK done: -#endif if (unlikely(fault & VM_FAULT_ERROR)) { tsk->thread.bad_cause = cause; mm_fault_error(regs, addr, fault); |