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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>
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From: Ian Wienand <ianw@gelato.unsw.edu.au>
- Fix inline function declarations
- Use #ifdef for CONFIG_*, not #if
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From: "H. Peter Anvin" <hpa@transmeta.com>
Remove the limit of 2048 pty's - allocate them on demand up to the 12:20
dev_t limit: a million.
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* devpts "upcalls" eliminated.
* instead of playing games with revalidation we simply use
ramfs-style tree and kill dentries upon devpts_pty_kill(). That
allows to get rid of a lot of code in fs/devpts/*.c.
* devpts_fs.h cleaned up.
* devpts/root.c and devpts/devpts_i.h removed.
* array of pointers to devpts inodes killed; with ramfs-style tree
it's not needed anymore.
* devpts/inode.c cleaned up.
* devpts_pty_new() used to get mk_kdev() only to convert it to
dev_t (hardly a surprise, since it's mknod() in disguise). Now it gets
dev_t as an argument.
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