Release 4.14 arch/powerpc/platforms/cell/spufs/syscalls.c
// SPDX-License-Identifier: GPL-2.0
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/export.h>
#include <linux/mount.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "spufs.h"
/**
* sys_spu_run - run code loaded into an SPU
*
* @unpc: next program counter for the SPU
* @ustatus: status of the SPU
*
* This system call transfers the control of execution of a
* user space thread to an SPU. It will return when the
* SPU has finished executing or when it hits an error
* condition and it will be interrupted if a signal needs
* to be delivered to a handler in user space.
*
* The next program counter is set to the passed value
* before the SPU starts fetching code and the user space
* pointer gets updated with the new value when returning
* from kernel space.
*
* The status value returned from spu_run reflects the
* value of the spu_status register after the SPU has stopped.
*
*/
static long do_spu_run(struct file *filp,
__u32 __user *unpc,
__u32 __user *ustatus)
{
long ret;
struct spufs_inode_info *i;
u32 npc, status;
ret = -EFAULT;
if (get_user(npc, unpc))
goto out;
/* check if this file was created by spu_create */
ret = -EINVAL;
if (filp->f_op != &spufs_context_fops)
goto out;
i = SPUFS_I(file_inode(filp));
ret = spufs_run_spu(i->i_ctx, &npc, &status);
if (put_user(npc, unpc))
ret = -EFAULT;
if (ustatus && put_user(status, ustatus))
ret = -EFAULT;
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnd Bergmann | 126 | 97.67% | 4 | 80.00% |
| Al Viro | 3 | 2.33% | 1 | 20.00% |
| Total | 129 | 100.00% | 5 | 100.00% |
static long do_spu_create(const char __user *pathname, unsigned int flags,
umode_t mode, struct file *neighbor)
{
struct path path;
struct dentry *dentry;
int ret;
dentry = user_path_create(AT_FDCWD, pathname, &path, LOOKUP_DIRECTORY);
ret = PTR_ERR(dentry);
if (!IS_ERR(dentry)) {
ret = spufs_create(&path, dentry, flags, mode, neighbor);
done_path_create(&path, dentry);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnd Bergmann | 63 | 67.02% | 3 | 33.33% |
| Al Viro | 29 | 30.85% | 4 | 44.44% |
| Sebastian Siewior | 1 | 1.06% | 1 | 11.11% |
| Jeff Layton | 1 | 1.06% | 1 | 11.11% |
| Total | 94 | 100.00% | 9 | 100.00% |
struct spufs_calls spufs_calls = {
.create_thread = do_spu_create,
.spu_run = do_spu_run,
.notify_spus_active = do_notify_spus_active,
.owner = THIS_MODULE,
#ifdef CONFIG_COREDUMP
.coredump_extra_notes_size = spufs_coredump_extra_notes_size,
.coredump_extra_notes_write = spufs_coredump_extra_notes_write,
#endif
};
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Arnd Bergmann | 227 | 78.01% | 6 | 30.00% |
| Al Viro | 32 | 11.00% | 5 | 25.00% |
| Michael Ellerman | 21 | 7.22% | 2 | 10.00% |
| Tejun Heo | 3 | 1.03% | 1 | 5.00% |
| Bob Nelson | 3 | 1.03% | 1 | 5.00% |
| Sebastian Siewior | 1 | 0.34% | 1 | 5.00% |
| Linus Torvalds | 1 | 0.34% | 1 | 5.00% |
| Greg Kroah-Hartman | 1 | 0.34% | 1 | 5.00% |
| Paul Gortmaker | 1 | 0.34% | 1 | 5.00% |
| Jeff Layton | 1 | 0.34% | 1 | 5.00% |
| Total | 291 | 100.00% | 20 | 100.00% |
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