The patch titled Subject: mm/nommu: share the i_mmap_rwsem has been removed from the -mm tree. Its filename was mm-nommu-share-the-i_mmap_rwsem.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Davidlohr Bueso <dave@xxxxxxxxxxxx> Subject: mm/nommu: share the i_mmap_rwsem Shrinking/truncate logic can call nommu_shrink_inode_mappings() to verify that any shared mappings of the inode in question aren't broken (dead zone). afaict the only user being ramfs to handle the size change attribute. Pretty much a no-brainer to share the lock. Signed-off-by: Davidlohr Bueso <dbueso@xxxxxxx> Acked-by: "Kirill A. Shutemov" <kirill@xxxxxxxxxxxxx> Acked-by: Hugh Dickins <hughd@xxxxxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Cc: Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/nommu.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff -puN mm/nommu.c~mm-nommu-share-the-i_mmap_rwsem mm/nommu.c --- a/mm/nommu.c~mm-nommu-share-the-i_mmap_rwsem +++ a/mm/nommu.c @@ -2094,14 +2094,14 @@ int nommu_shrink_inode_mappings(struct i high = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; down_write(&nommu_region_sem); - i_mmap_lock_write(inode->i_mapping); + i_mmap_lock_read(inode->i_mapping); /* search for VMAs that fall within the dead zone */ vma_interval_tree_foreach(vma, &inode->i_mapping->i_mmap, low, high) { /* found one - only interested if it's shared out of the page * cache */ if (vma->vm_flags & VM_SHARED) { - i_mmap_unlock_write(inode->i_mapping); + i_mmap_unlock_read(inode->i_mapping); up_write(&nommu_region_sem); return -ETXTBSY; /* not quite true, but near enough */ } @@ -2113,8 +2113,7 @@ int nommu_shrink_inode_mappings(struct i * we don't check for any regions that start beyond the EOF as there * shouldn't be any */ - vma_interval_tree_foreach(vma, &inode->i_mapping->i_mmap, - 0, ULONG_MAX) { + vma_interval_tree_foreach(vma, &inode->i_mapping->i_mmap, 0, ULONG_MAX) { if (!(vma->vm_flags & VM_SHARED)) continue; @@ -2129,7 +2128,7 @@ int nommu_shrink_inode_mappings(struct i } } - i_mmap_unlock_write(inode->i_mapping); + i_mmap_unlock_read(inode->i_mapping); up_write(&nommu_region_sem); return 0; } _ Patches currently in -mm which might be from dave@xxxxxxxxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html