fs: fix kernel_read prototype

Use proper ssize_t and size_t types for the return value and count
argument, move the offset last and make it an in/out argument like
all other read/write helpers, and make the buf argument a void pointer
to get rid of lots of casts in the callers.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Christoph Hellwig 2017-09-01 17:39:13 +02:00 • committed by Al Viro
commit bdd1d2d3d2
17 changed files with 69 additions and 71 deletions

View file

@ -277,7 +277,7 @@ static int cx25821_get_audio_data(struct cx25821_dev *dev,
p = (char *)dev->_audiodata_buf_virt_addr + frame_offset;
for (i = 0; i < dev->_audio_lines_count; i++) {
int n = kernel_read(file, file_offset, mybuf, AUDIO_LINE_SIZE);
int n = kernel_read(file, mybuf, AUDIO_LINE_SIZE, &file_offset);
if (n < AUDIO_LINE_SIZE) {
pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
__func__);
@ -290,7 +290,6 @@ static int cx25821_get_audio_data(struct cx25821_dev *dev,
memcpy(p, mybuf, n);
p += n;
}
file_offset += n;
}
dev->_audioframe_count++;
fput(file);
@ -318,7 +317,7 @@ static int cx25821_openfile_audio(struct cx25821_dev *dev,
{
char *p = (void *)dev->_audiodata_buf_virt_addr;
struct file *file;
loff_t offset;
loff_t file_offset = 0;
int i, j;
file = filp_open(dev->_audiofilename, O_RDONLY | O_LARGEFILE, 0);
@ -328,11 +327,11 @@ static int cx25821_openfile_audio(struct cx25821_dev *dev,
return PTR_ERR(file);
}
for (j = 0, offset = 0; j < NUM_AUDIO_FRAMES; j++) {
for (j = 0; j < NUM_AUDIO_FRAMES; j++) {
for (i = 0; i < dev->_audio_lines_count; i++) {
char buf[AUDIO_LINE_SIZE];
int n = kernel_read(file, offset, buf,
AUDIO_LINE_SIZE);
loff_t offset = file_offset;
int n = kernel_read(file, buf, AUDIO_LINE_SIZE, &file_offset);
if (n < AUDIO_LINE_SIZE) {
pr_info("Done: exit %s() since no more bytes to read from Audio file\n",
@ -344,8 +343,6 @@ static int cx25821_openfile_audio(struct cx25821_dev *dev,
if (p)
memcpy(p + offset, buf, n);
offset += n;
}
dev->_audioframe_count++;
}