xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pipe: kill ->map() and ->unmap()

Browse Source 
all pipe_buffer_operations have the same instances of those...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2014-02-02 21:09:54 -05:00
parent 58bda1da4b
commit fbb32750a6
7 changed files with 29 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
fs/splice.c
View File

@@ -136,8 +136,6 @@ error:
const struct pipe_buf_operations page_cache_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.confirm = page_cache_pipe_buf_confirm,
.release = page_cache_pipe_buf_release,
.steal = page_cache_pipe_buf_steal,
@@ -156,8 +154,6 @@ static int user_page_pipe_buf_steal(struct pipe_inode_info *pipe,
static const struct pipe_buf_operations user_page_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.confirm = generic_pipe_buf_confirm,
.release = page_cache_pipe_buf_release,
.steal = user_page_pipe_buf_steal,
@@ -547,8 +543,6 @@ EXPORT_SYMBOL(generic_file_splice_read);
static const struct pipe_buf_operations default_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.confirm = generic_pipe_buf_confirm,
.release = generic_pipe_buf_release,
.steal = generic_pipe_buf_steal,
@@ -564,8 +558,6 @@ static int generic_pipe_buf_nosteal(struct pipe_inode_info *pipe,
/* Pipe buffer operations for a socket and similar. */
const struct pipe_buf_operations nosteal_pipe_buf_ops = {
.can_merge = 0,
.map = generic_pipe_buf_map,
.unmap = generic_pipe_buf_unmap,
.confirm = generic_pipe_buf_confirm,
.release = generic_pipe_buf_release,
.steal = generic_pipe_buf_nosteal,
@@ -767,13 +759,13 @@ int pipe_to_file(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
goto out;
if (buf->page != page) {
char *src = buf->ops->map(pipe, buf, 1);
char *src = kmap_atomic(buf->page);
char *dst = kmap_atomic(page);
memcpy(dst + offset, src + buf->offset, this_len);
flush_dcache_page(page);
kunmap_atomic(dst);
buf->ops->unmap(pipe, buf, src);
kunmap_atomic(src);
}
ret = pagecache_write_end(file, mapping, sd->pos, this_len, this_len,
page, fsdata);
@@ -1067,9 +1059,9 @@ static int write_pipe_buf(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
void *data;
loff_t tmp = sd->pos;
data = buf->ops->map(pipe, buf, 0);
data = kmap(buf->page);
ret = __kernel_write(sd->u.file, data + buf->offset, sd->len, &tmp);
buf->ops->unmap(pipe, buf, data);
kunmap(buf->page);
return ret;
}
@@ -1536,10 +1528,10 @@ static int pipe_to_user(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
* pages and doing an atomic copy
*/
if (!fault_in_pages_writeable(sd->u.userptr, sd->len)) {
src = buf->ops->map(pipe, buf, 1);
src = kmap_atomic(buf->page);
ret = __copy_to_user_inatomic(sd->u.userptr, src + buf->offset,
sd->len);
buf->ops->unmap(pipe, buf, src);
kunmap_atomic(src);
if (!ret) {
ret = sd->len;
goto out;
@@ -1549,13 +1541,13 @@ static int pipe_to_user(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
/*
* No dice, use slow non-atomic map and copy
*/
src = buf->ops->map(pipe, buf, 0);
src = kmap(buf->page);
ret = sd->len;
if (copy_to_user(sd->u.userptr, src + buf->offset, sd->len))
ret = -EFAULT;
buf->ops->unmap(pipe, buf, src);
kunmap(buf->page);
out:
if (ret > 0)
sd->u.userptr += ret;