Using this helper allows us to avoid the in-kernel calls to the
sys_sync() syscall. The ksys_ prefix denotes that this function
is meant as a drop-in replacement for the syscall. In particular, it
uses the same calling convention as sys_sync().
This patch is part of a series which removes in-kernel calls to syscalls.
On this basis, the syscall entry path can be streamlined. For details, see
http://lkml.kernel.org/r/
20180325162527.GA17492@light.dominikbrodowski.net
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
show_free_areas(0, NULL);
if (!is_idle_task(current)) {
local_irq_enable();
- sys_sync();
+ ksys_sync();
local_irq_disable();
}
prom_printf("Returning to prom\n");
state->reset_requested = true;
- sys_sync();
+ ksys_sync();
kernel_restart(NULL);
}
* just write metadata (such as inodes or bitmaps) to block device page cache
* and do not sync it on their own in ->sync_fs().
*/
-SYSCALL_DEFINE0(sync)
+void ksys_sync(void)
{
int nowait = 0, wait = 1;
iterate_bdevs(fdatawait_one_bdev, NULL);
if (unlikely(laptop_mode))
laptop_sync_completion();
+}
+
+SYSCALL_DEFINE0(sync)
+{
+ ksys_sync();
return 0;
}
int ksys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg);
off_t ksys_lseek(unsigned int fd, off_t offset, unsigned int whence);
ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count);
+void ksys_sync(void);
/*
* The following kernel syscall equivalents are just wrappers to fs-internal
}
pr_info("Syncing filesystems ... \n");
- sys_sync();
+ ksys_sync();
pr_info("done.\n");
error = freeze_processes();
#ifndef CONFIG_SUSPEND_SKIP_SYNC
trace_suspend_resume(TPS("sync_filesystems"), 0, true);
pr_info("Syncing filesystems ... ");
- sys_sync();
+ ksys_sync();
pr_cont("done.\n");
trace_suspend_resume(TPS("sync_filesystems"), 0, false);
#endif
break;
printk("Syncing filesystems ... ");
- sys_sync();
+ ksys_sync();
printk("done.\n");
error = freeze_processes();