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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2008-08-06 15:12:22 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2008-09-29 17:56:57 -0400 |
| commit | bfcd17a6c5529bc37234cfa720a047cf9397bcfc (patch) | |
| tree | f4e087479a8c559f1a5ca3be96c64afd172e12c1 /fs/proc/proc_misc.c | |
| parent | 04716e6621ff4abb422d64ba7b48718f52716a3e (diff) | |
| download | talos-op-linux-bfcd17a6c5529bc37234cfa720a047cf9397bcfc.tar.gz talos-op-linux-bfcd17a6c5529bc37234cfa720a047cf9397bcfc.zip | |
Configure out file locking features
This patch adds the CONFIG_FILE_LOCKING option which allows to remove
support for advisory locks. With this patch enabled, the flock()
system call, the F_GETLK, F_SETLK and F_SETLKW operations of fcntl()
and NFS support are disabled. These features are not necessarly needed
on embedded systems. It allows to save ~11 Kb of kernel code and data:
text data bss dec hex filename
1125436 118764 212992 1457192 163c28 vmlinux.old
1114299 118564 212992 1445855 160fdf vmlinux
-11137 -200 0 -11337 -2C49 +/-
This patch has originally been written by Matt Mackall
<mpm@selenic.com>, and is part of the Linux Tiny project.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Matt Mackall <mpm@selenic.com>
Cc: matthew@wil.cx
Cc: linux-fsdevel@vger.kernel.org
Cc: mpm@selenic.com
Cc: akpm@linux-foundation.org
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/proc/proc_misc.c')
| -rw-r--r-- | fs/proc/proc_misc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/proc/proc_misc.c b/fs/proc/proc_misc.c index 29e20c6b1f7f..1aabbe2592e1 100644 --- a/fs/proc/proc_misc.c +++ b/fs/proc/proc_misc.c @@ -684,6 +684,7 @@ static int cmdline_read_proc(char *page, char **start, off_t off, return proc_calc_metrics(page, start, off, count, eof, len); } +#ifdef CONFIG_FILE_LOCKING static int locks_open(struct inode *inode, struct file *filp) { return seq_open(filp, &locks_seq_operations); @@ -695,6 +696,7 @@ static const struct file_operations proc_locks_operations = { .llseek = seq_lseek, .release = seq_release, }; +#endif /* CONFIG_FILE_LOCKING */ static int execdomains_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data) @@ -888,7 +890,9 @@ void __init proc_misc_init(void) #ifdef CONFIG_PRINTK proc_create("kmsg", S_IRUSR, NULL, &proc_kmsg_operations); #endif +#ifdef CONFIG_FILE_LOCKING proc_create("locks", 0, NULL, &proc_locks_operations); +#endif proc_create("devices", 0, NULL, &proc_devinfo_operations); proc_create("cpuinfo", 0, NULL, &proc_cpuinfo_operations); #ifdef CONFIG_BLOCK |
