Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jiri Olsa |
159 |
60.00% |
4 |
25.00% |
| Arnaldo Carvalho de Melo |
43 |
16.23% |
2 |
12.50% |
| Adrian Hunter |
23 |
8.68% |
1 |
6.25% |
| Namhyung Kim |
11 |
4.15% |
1 |
6.25% |
| Peter Zijlstra |
7 |
2.64% |
1 |
6.25% |
| Tom Zanussi |
6 |
2.26% |
1 |
6.25% |
| David Carrillo-Cisneros |
6 |
2.26% |
1 |
6.25% |
| Masami Hiramatsu |
3 |
1.13% |
1 |
6.25% |
| Ingo Molnar |
2 |
0.75% |
1 |
6.25% |
| Joerg Roedel |
2 |
0.75% |
1 |
6.25% |
| Wang Nan |
2 |
0.75% |
1 |
6.25% |
| Greg Kroah-Hartman |
1 |
0.38% |
1 |
6.25% |
| Total |
265 |
|
16 |
|
// SPDX-License-Identifier: GPL-2.0
#include <unistd.h>
#include <stdbool.h>
#include <errno.h>
#include <linux/kernel.h>
#include <internal/lib.h>
unsigned int page_size;
static ssize_t ion(bool is_read, int fd, void *buf, size_t n)
{
void *buf_start = buf;
size_t left = n;
while (left) {
/* buf must be treated as const if !is_read. */
ssize_t ret = is_read ? read(fd, buf, left) :
write(fd, buf, left);
if (ret < 0 && errno == EINTR)
continue;
if (ret <= 0)
return ret;
left -= ret;
buf += ret;
}
BUG_ON((size_t)(buf - buf_start) != n);
return n;
}
/*
* Read exactly 'n' bytes or return an error.
*/
ssize_t readn(int fd, void *buf, size_t n)
{
return ion(true, fd, buf, n);
}
ssize_t preadn(int fd, void *buf, size_t n, off_t offs)
{
size_t left = n;
while (left) {
ssize_t ret = pread(fd, buf, left, offs);
if (ret < 0 && errno == EINTR)
continue;
if (ret <= 0)
return ret;
left -= ret;
buf += ret;
offs += ret;
}
return n;
}
/*
* Write exactly 'n' bytes or return an error.
*/
ssize_t writen(int fd, const void *buf, size_t n)
{
/* ion does not modify buf. */
return ion(false, fd, (void *)buf, n);
}