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Date: Mon, 10 Sep 2018 21:16:12 +0530
From: Souptick Joarder <jrdr.linux@...il.com>
To: tytso@....edu, adilger.kernel@...ger.ca, darrick.wong@...cle.com,
axboe@...nel.dk, nborisov@...e.com, ak@...ux.intel.com,
viro@...iv.linux.org.uk, kemi.wang@...el.com, willy@...radead.org,
gregkh@...uxfoundation.org, ebiggers@...gle.com
Cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fs/ext4: Convert fault handler to use vm_fault_t type
Return type of ext4_page_mkwrite and ext4_filemap_fault are
changed to use vm_fault_t type.
With this patch all the callers of block_page_mkwrite_return()
are changed to handle vm_fault_t. So converting the return type
of block_page_mkwrite_return() to vm_fault_t.
Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
---
fs/ext4/ext4.h | 4 ++--
fs/ext4/inode.c | 29 +++++++++++++++--------------
include/linux/buffer_head.h | 2 +-
3 files changed, 18 insertions(+), 17 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 0f0edd1..8506b14 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2469,8 +2469,8 @@ int do_journal_get_write_access(handle_t *handle,
extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
loff_t lstart, loff_t lend);
-extern int ext4_page_mkwrite(struct vm_fault *vmf);
-extern int ext4_filemap_fault(struct vm_fault *vmf);
+extern vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf);
+extern vm_fault_t ext4_filemap_fault(struct vm_fault *vmf);
extern qsize_t *ext4_get_reserved_space(struct inode *inode);
extern int ext4_get_projid(struct inode *inode, kprojid_t *projid);
extern void ext4_da_update_reserve_space(struct inode *inode,
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d0dd585..7c1723b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -6151,13 +6151,14 @@ static int ext4_bh_unmapped(handle_t *handle, struct buffer_head *bh)
return !buffer_mapped(bh);
}
-int ext4_page_mkwrite(struct vm_fault *vmf)
+vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
struct page *page = vmf->page;
loff_t size;
unsigned long len;
- int ret;
+ int err;
+ vm_fault_t ret;
struct file *file = vma->vm_file;
struct inode *inode = file_inode(file);
struct address_space *mapping = inode->i_mapping;
@@ -6170,8 +6171,8 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
down_read(&EXT4_I(inode)->i_mmap_sem);
- ret = ext4_convert_inline_data(inode);
- if (ret)
+ err = ext4_convert_inline_data(inode);
+ if (err)
goto out_ret;
/* Delalloc case is easy... */
@@ -6179,9 +6180,9 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
!ext4_should_journal_data(inode) &&
!ext4_nonda_switch(inode->i_sb)) {
do {
- ret = block_page_mkwrite(vma, vmf,
+ err = block_page_mkwrite(vma, vmf,
ext4_da_get_block_prep);
- } while (ret == -ENOSPC &&
+ } while (err == -ENOSPC &&
ext4_should_retry_alloc(inode->i_sb, &retries));
goto out_ret;
}
@@ -6226,8 +6227,8 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
ret = VM_FAULT_SIGBUS;
goto out;
}
- ret = block_page_mkwrite(vma, vmf, get_block);
- if (!ret && ext4_should_journal_data(inode)) {
+ err = block_page_mkwrite(vma, vmf, get_block);
+ if (!err && ext4_should_journal_data(inode)) {
if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
PAGE_SIZE, NULL, do_journal_get_write_access)) {
unlock_page(page);
@@ -6238,24 +6239,24 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
}
ext4_journal_stop(handle);
- if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ if (err == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry_alloc;
out_ret:
- ret = block_page_mkwrite_return(ret);
+ ret = block_page_mkwrite_return(err);
out:
up_read(&EXT4_I(inode)->i_mmap_sem);
sb_end_pagefault(inode->i_sb);
return ret;
}
-int ext4_filemap_fault(struct vm_fault *vmf)
+vm_fault_t ext4_filemap_fault(struct vm_fault *vmf)
{
struct inode *inode = file_inode(vmf->vma->vm_file);
- int err;
+ vm_fault_t ret;
down_read(&EXT4_I(inode)->i_mmap_sem);
- err = filemap_fault(vmf);
+ ret = filemap_fault(vmf);
up_read(&EXT4_I(inode)->i_mmap_sem);
- return err;
+ return ret;
}
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 96225a7..7b73ef7 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -242,7 +242,7 @@ int cont_write_begin(struct file *, struct address_space *, loff_t,
int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
get_block_t get_block);
/* Convert errno to return value from ->page_mkwrite() call */
-static inline int block_page_mkwrite_return(int err)
+static inline vm_fault_t block_page_mkwrite_return(int err)
{
if (err == 0)
return VM_FAULT_LOCKED;
--
1.9.1
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