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authorSukadev Bhattiprolu <sukadev@us.ibm.com>2008-04-30 03:54:21 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 11:29:48 -0400
commit718a916338e821a10961e6a7a17430c18e5e58d9 (patch)
treeb261fd36e7a4f642223668596c85da62b60729a4 /include/linux/devpts_fs.h
parent4f8f9d66cdac4845409f7520e4f287a1907a6bf9 (diff)
devpts: factor out PTY index allocation
Factor out the code used to allocate/free a pts index into new interfaces, devpts_new_index() and devpts_kill_index(). This localizes the external data structures used in managing the pts indices. [akpm@linux-foundation.org: undo accidental mutex2sem conversion] Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com> Signed-off-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Matt Helsley <matthltc@us.ibm.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/devpts_fs.h')
-rw-r--r--include/linux/devpts_fs.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/devpts_fs.h b/include/linux/devpts_fs.h
index b672ddc00735..154769cad3f3 100644
--- a/include/linux/devpts_fs.h
+++ b/include/linux/devpts_fs.h
@@ -17,6 +17,8 @@
17 17
18#ifdef CONFIG_UNIX98_PTYS 18#ifdef CONFIG_UNIX98_PTYS
19 19
20int devpts_new_index(void);
21void devpts_kill_index(int idx);
20int devpts_pty_new(struct tty_struct *tty); /* mknod in devpts */ 22int devpts_pty_new(struct tty_struct *tty); /* mknod in devpts */
21struct tty_struct *devpts_get_tty(int number); /* get tty structure */ 23struct tty_struct *devpts_get_tty(int number); /* get tty structure */
22void devpts_pty_kill(int number); /* unlink */ 24void devpts_pty_kill(int number); /* unlink */
@@ -24,6 +26,8 @@ void devpts_pty_kill(int number); /* unlink */
24#else 26#else
25 27
26/* Dummy stubs in the no-pty case */ 28/* Dummy stubs in the no-pty case */
29static inline int devpts_new_index(void) { return -EINVAL; }
30static inline void devpts_kill_index(int idx) { }
27static inline int devpts_pty_new(struct tty_struct *tty) { return -EINVAL; } 31static inline int devpts_pty_new(struct tty_struct *tty) { return -EINVAL; }
28static inline struct tty_struct *devpts_get_tty(int number) { return NULL; } 32static inline struct tty_struct *devpts_get_tty(int number) { return NULL; }
29static inline void devpts_pty_kill(int number) { } 33static inline void devpts_pty_kill(int number) { }