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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-10-21 15:52:04 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-10-21 15:52:04 +1100 |
| commit | a02efb906d12c9d4eb2ab7c59049ba9545e5412d (patch) | |
| tree | bf1f6467978ec63a22f42299ecac2ee7f7e73336 /mm/fremap.c | |
| parent | 84dfcb4b318463cd4883b6a19937824f49aee564 (diff) | |
| parent | 2515ddc6db8eb49a79f0fe5e67ff09ac7c81eab4 (diff) | |
Merge commit 'origin' into master
Manual merge of:
arch/powerpc/Kconfig
arch/powerpc/include/asm/page.h
Diffstat (limited to 'mm/fremap.c')
| -rw-r--r-- | mm/fremap.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/mm/fremap.c b/mm/fremap.c index 7881638e4a12..7d12ca70ef7b 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -21,6 +21,8 @@ #include <asm/cacheflush.h> #include <asm/tlbflush.h> +#include "internal.h" + static void zap_pte(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { @@ -215,15 +217,31 @@ asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size, spin_unlock(&mapping->i_mmap_lock); } + if (vma->vm_flags & VM_LOCKED) { + /* + * drop PG_Mlocked flag for over-mapped range + */ + unsigned int saved_flags = vma->vm_flags; + munlock_vma_pages_range(vma, start, start + size); + vma->vm_flags = saved_flags; + } + mmu_notifier_invalidate_range_start(mm, start, start + size); err = populate_range(mm, vma, start, size, pgoff); mmu_notifier_invalidate_range_end(mm, start, start + size); if (!err && !(flags & MAP_NONBLOCK)) { - if (unlikely(has_write_lock)) { - downgrade_write(&mm->mmap_sem); - has_write_lock = 0; + if (vma->vm_flags & VM_LOCKED) { + /* + * might be mapping previously unmapped range of file + */ + mlock_vma_pages_range(vma, start, start + size); + } else { + if (unlikely(has_write_lock)) { + downgrade_write(&mm->mmap_sem); + has_write_lock = 0; + } + make_pages_present(start, start+size); } - make_pages_present(start, start+size); } /* @@ -240,4 +258,3 @@ out: return err; } - |