The patch titled
proc tty: add struct tty_operations::proc_fops
has been removed from the -mm tree. Its filename was
proc-tty-add-struct-tty_operations-proc_fops.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: proc tty: add struct tty_operations::proc_fops
From: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Used for gradual switch of TTY drivers from using ->read_proc which helps
with gradual switch from ->read_proc for the whole tree.
As side effect, fix possible race condition when ->data initialized after
PDE is hooked into proc tree.
->proc_fops takes precedence over ->read_proc.
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/proc_tty.c | 20 +++++++++++++-------
include/linux/tty_driver.h | 1 +
2 files changed, 14 insertions(+), 7 deletions(-)
diff -puN fs/proc/proc_tty.c~proc-tty-add-struct-tty_operations-proc_fops fs/proc/proc_tty.c
--- a/fs/proc/proc_tty.c~proc-tty-add-struct-tty_operations-proc_fops
+++ a/fs/proc/proc_tty.c
@@ -144,16 +144,22 @@ void proc_tty_register_driver(struct tty
{
struct proc_dir_entry *ent;
- if (!driver->ops->read_proc || !driver->driver_name ||
- driver->proc_entry)
+ if (!driver->driver_name || driver->proc_entry)
return;
- ent = create_proc_entry(driver->driver_name, 0, proc_tty_driver);
- if (!ent)
+ if (driver->ops->proc_fops) {
+ ent = proc_create_data(driver->driver_name, 0, proc_tty_driver,
+ driver->ops->proc_fops, driver);
+ if (!ent)
+ return;
+ } else if (driver->ops->read_proc) {
+ ent = create_proc_entry(driver->driver_name, 0, proc_tty_driver);
+ if (!ent)
+ return;
+ ent->read_proc = driver->ops->read_proc;
+ ent->data = driver;
+ } else
return;
- ent->read_proc = driver->ops->read_proc;
- ent->data = driver;
-
driver->proc_entry = ent;
}
diff -puN include/linux/tty_driver.h~proc-tty-add-struct-tty_operations-proc_fops include/linux/tty_driver.h
--- a/include/linux/tty_driver.h~proc-tty-add-struct-tty_operations-proc_fops
+++ a/include/linux/tty_driver.h
@@ -264,6 +264,7 @@ struct tty_operations {
int (*poll_get_char)(struct tty_driver *driver, int line);
void (*poll_put_char)(struct tty_driver *driver, int line, char ch);
#endif
+ const struct file_operations *proc_fops;
};
struct tty_driver {
_
Patches currently in -mm which might be from adobriyan@xxxxxxxxx are
origin.patch
linux-next.patch
sysctl-dont-take-the-use-count-of-multiple-heads-at-a-time.patch
sysctl-lockdep-support-for-sysctl-reference-counting.patch
simplify-copy_thread.patch
simplify-copy_thread-checkpatch-fixes.patch
softirq-introduce-statistics-for-softirq.patch
proc-export-statistics-for-softirq-to-proc.patch
proc-export-statistics-for-softirq-to-proc-fix.patch
proc-update-document-for-proc-softirqs-and-proc-stat.patch
proc_sysctl-use-config_proc_sysctl-around-ipc-and-utsname-proc_handlers.patch
sysctl-fix-suid_dumpable-and-lease-break-time-sysctls.patch
namespaces-move-proc_net_get_sb-to-a-generic-fs-superc-helper.patch
namespaces-move-proc_net_get_sb-to-a-generic-fs-superc-helper-fix.patch
namespaces-mqueue-ns-move-mqueue_mnt-into-struct-ipc_namespace.patch
namespaces-ipc-namespaces-implement-support-for-posix-msqueues.patch
namespaces-ipc-namespaces-implement-support-for-posix-msqueues-initialize-init_ipc_nscount-to-1.patch
namespaces-mqueue-namespace-adapt-sysctl.patch
namespaces-mqueue-namespace-adapt-sysctl-update.patch
namespaces-mqueue-namespace-adapt-sysctl-update-fix.patch
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