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Message-ID: <20180728085000.GA9136@jordon-HP-15-Notebook-PC>
Date: Sat, 28 Jul 2018 14:20:00 +0530
From: Souptick Joarder <jrdr.linux@...il.com>
To: willy@...radead.org, tytso@....edu, adilger.kernel@...ger.ca,
darrick.wong@...cle.com, axboe@...nel.dk, agruenba@...hat.com,
ebiggers@...gle.com, gregkh@...uxfoundation.org,
kemi.wang@...el.com
Cc: sabyasachi.linux@...il.com, brajeswar.linux@...il.com,
linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ext4: Convert int to vm_fault_t type
Use new return type vm_fault_t for ext4_page_mkwrite
handler and block_page_mkwrite_return.
Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
---
fs/ext4/ext4.h | 2 +-
fs/ext4/inode.c | 20 ++++++++++----------
include/linux/buffer_head.h | 3 ++-
3 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index aec0010..1183773 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2469,7 +2469,7 @@ 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 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);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 03ac322..b491fdb 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -6108,27 +6108,27 @@ 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;
+ vm_fault_t ret;
struct file *file = vma->vm_file;
struct inode *inode = file_inode(file);
struct address_space *mapping = inode->i_mapping;
handle_t *handle;
get_block_t *get_block;
- int retries = 0;
+ int retries = 0, err;
sb_start_pagefault(inode->i_sb);
file_update_time(vma->vm_file);
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... */
@@ -6138,9 +6138,9 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
do {
ret = block_page_mkwrite(vma, vmf,
ext4_da_get_block_prep);
- } while (ret == -ENOSPC &&
+ } while (ret == VM_FAULT_SIGBUS &&
ext4_should_retry_alloc(inode->i_sb, &retries));
- goto out_ret;
+ goto out;
}
lock_page(page);
@@ -6188,17 +6188,17 @@ int ext4_page_mkwrite(struct vm_fault *vmf)
if (ext4_walk_page_buffers(handle, page_buffers(page), 0,
PAGE_SIZE, NULL, do_journal_get_write_access)) {
unlock_page(page);
- ret = VM_FAULT_SIGBUS;
ext4_journal_stop(handle);
goto out;
}
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
}
ext4_journal_stop(handle);
- if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ if (ret == VM_FAULT_SIGBUS &&
+ 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);
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 96225a7..ed7a81b 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -14,6 +14,7 @@
#include <linux/pagemap.h>
#include <linux/wait.h>
#include <linux/atomic.h>
+#include <linux/mm_types.h>
#ifdef CONFIG_BLOCK
@@ -242,7 +243,7 @@ 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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