mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 21:21:41 +00:00
8fd3395ec9
Once upon a time, predecessors of those used to do file lookup without bumping a refcount, provided that caller held rcu_read_lock() across the lookup and whatever it wanted to read from the struct file found. When struct file allocation switched to SLAB_TYPESAFE_BY_RCU, that stopped being feasible and these primitives started to bump the file refcount for lookup result, requiring the caller to call fput() afterwards. But that turned them pointless - e.g. rcu_read_lock(); file = lookup_fdget_rcu(fd); rcu_read_unlock(); is equivalent to file = fget_raw(fd); and all callers of lookup_fdget_rcu() are of that form. Similarly, task_lookup_fdget_rcu() calls can be replaced with calling fget_task(). task_lookup_next_fdget_rcu() doesn't have direct counterparts, but its callers would be happier if we replaced it with an analogue that deals with RCU internally. Reviewed-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|---|---|---|
| .. | ||
| array.c | ||
| base.c | ||
| bootconfig.c | ||
| cmdline.c | ||
| consoles.c | ||
| cpuinfo.c | ||
| devices.c | ||
| fd.c | ||
| fd.h | ||
| generic.c | ||
| inode.c | ||
| internal.h | ||
| interrupts.c | ||
| Kconfig | ||
| kcore.c | ||
| kmsg.c | ||
| loadavg.c | ||
| Makefile | ||
| meminfo.c | ||
| namespaces.c | ||
| nommu.c | ||
| page.c | ||
| proc_net.c | ||
| proc_sysctl.c | ||
| proc_tty.c | ||
| root.c | ||
| self.c | ||
| softirqs.c | ||
| stat.c | ||
| task_mmu.c | ||
| task_nommu.c | ||
| thread_self.c | ||
| uptime.c | ||
| util.c | ||
| version.c | ||
| vmcore.c | ||