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| author | Souptick Joarder <jrdr.linux@gmail.com> | 2018-06-06 16:24:44 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-06-07 17:27:45 +0200 |
| commit | a528a24150870c5c16cbbbec69dba7e992b08456 (patch) | |
| tree | df48cf3afefbda584507d1d633ce3d54c5f975be /fs/btrfs | |
| parent | Btrfs: fiemap: pass correct bytenr when fm_extent_count is zero (diff) | |
| download | linux-a528a24150870c5c16cbbbec69dba7e992b08456.tar.xz linux-a528a24150870c5c16cbbbec69dba7e992b08456.zip | |
btrfs: change return type of btrfs_page_mkwrite to vm_fault_t
Use the new return type vm_fault_t for fault handler. For now, this is
just documenting that the function returns a VM_FAULT value rather than
an errno. Once all instances are converted, vm_fault_t will become a
distinct type.
Reference commit 1c8f422059ae ("mm: change return type to vm_fault_t")
vmf_error() is the newly introduced inline function in 4.17-rc6.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ctree.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 26 |
2 files changed, 13 insertions, 15 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index f4bf7874c24a..118346aceea9 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3197,7 +3197,7 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset, size_t size, struct bio *bio, unsigned long bio_flags); void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); -int btrfs_page_mkwrite(struct vm_fault *vmf); +vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); int btrfs_readpage(struct file *file, struct page *page); void btrfs_evict_inode(struct inode *inode); int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 89b208201783..c12b7a6e534a 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -8872,7 +8872,7 @@ again: * beyond EOF, then the page is guaranteed safe against truncation until we * unlock the page. */ -int btrfs_page_mkwrite(struct vm_fault *vmf) +vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf) { struct page *page = vmf->page; struct inode *inode = file_inode(vmf->vma->vm_file); @@ -8884,7 +8884,8 @@ int btrfs_page_mkwrite(struct vm_fault *vmf) char *kaddr; unsigned long zero_start; loff_t size; - int ret; + vm_fault_t ret; + int ret2; int reserved = 0; u64 reserved_space; u64 page_start; @@ -8906,17 +8907,14 @@ int btrfs_page_mkwrite(struct vm_fault *vmf) * end up waiting indefinitely to get a lock on the page currently * being processed by btrfs_page_mkwrite() function. */ - ret = btrfs_delalloc_reserve_space(inode, &data_reserved, page_start, + ret2 = btrfs_delalloc_reserve_space(inode, &data_reserved, page_start, reserved_space); - if (!ret) { - ret = file_update_time(vmf->vma->vm_file); + if (!ret2) { + ret2 = file_update_time(vmf->vma->vm_file); reserved = 1; } - if (ret) { - if (ret == -ENOMEM) - ret = VM_FAULT_OOM; - else /* -ENOSPC, -EIO, etc */ - ret = VM_FAULT_SIGBUS; + if (ret2) { + ret = vmf_error(ret2); if (reserved) goto out; goto out_noreserve; @@ -8975,15 +8973,15 @@ again: EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0, &cached_state); - ret = btrfs_set_extent_delalloc(inode, page_start, end, 0, + ret2 = btrfs_set_extent_delalloc(inode, page_start, end, 0, &cached_state, 0); - if (ret) { + if (ret2) { unlock_extent_cached(io_tree, page_start, page_end, &cached_state); ret = VM_FAULT_SIGBUS; goto out_unlock; } - ret = 0; + ret2 = 0; /* page is wholly or partially inside EOF */ if (page_start + PAGE_SIZE > size) @@ -9008,7 +9006,7 @@ again: unlock_extent_cached(io_tree, page_start, page_end, &cached_state); out_unlock: - if (!ret) { + if (!ret2) { btrfs_delalloc_release_extents(BTRFS_I(inode), PAGE_SIZE, true); sb_end_pagefault(inode->i_sb); extent_changeset_free(data_reserved); |