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Un-inline get_pipe_info() helper function 

This avoids some include-file hell, and the function isn't really
important enough to be inlined anyway.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2010-11-28 16:27:19 -08:00
parent c66fb34794
commit 7208364652
2 changed files with 13 additions and 12 deletions
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12
fs/pipe.c
View File

@ -1199,6 +1199,18 @@ int pipe_proc_fn(struct ctl_table *table, int write, void __user *buf,
return ret; return ret;
} }
/*
* After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same
* location, so checking ->i_pipe is not enough to verify that this is a
* pipe.
*/
struct pipe_inode_info *get_pipe_info(struct file *file)
{
struct inode *i = file->f_path.dentry->d_inode;
return S_ISFIFO(i->i_mode) ? i->i_pipe : NULL;
}
long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg) long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
{ {
struct pipe_inode_info *pipe; struct pipe_inode_info *pipe;

13
include/linux/pipe_fs_i.h
View File

@ -160,17 +160,6 @@ void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *);
/* for F_SETPIPE_SZ and F_GETPIPE_SZ */ /* for F_SETPIPE_SZ and F_GETPIPE_SZ */
long pipe_fcntl(struct file *, unsigned int, unsigned long arg); long pipe_fcntl(struct file *, unsigned int, unsigned long arg);
struct pipe_inode_info *get_pipe_info(struct file *file);
/*
* After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same
* location, so checking ->i_pipe is not enough to verify that this is a
* pipe.
*/
static inline struct pipe_inode_info *get_pipe_info(struct file *file)
{
struct inode *i = file->f_path.dentry->d_inode;
return S_ISFIFO(i->i_mode) ? i->i_pipe : NULL;
}
#endif #endif