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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2008-10-15 22:05:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 11:21:51 -0700
commitebf3f09c634906d371f2bfd71b41c7e0c52efe7e (patch)
tree4205040f47fba2675dc4c6b1407d15c9d6f8b355 /kernel
parentd8273674721faaf84bec2190c0c7a82972b37f73 (diff)
Configure out AIO support
This patchs adds the CONFIG_AIO option which allows to remove support for asynchronous I/O operations, that are not necessarly used by applications, particularly on embedded devices. As this is a size-reduction option, it depends on CONFIG_EMBEDDED. It allows to save ~7 kilobytes of kernel code/data: text data bss dec hex filename 1115067 119180 217088 1451335 162547 vmlinux 1108025 119048 217088 1444161 160941 vmlinux.new -7042 -132 0 -7174 -1C06 +/- This patch has been originally written by Matt Mackall <mpm@selenic.com>, and is part of the Linux Tiny project. [randy.dunlap@oracle.com: build fix] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Zach Brown <zach.brown@oracle.com> Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sys_ni.c5
-rw-r--r--kernel/sysctl.c2
2 files changed, 7 insertions, 0 deletions
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 503d8d4eb80..a77b27b11b0 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -126,6 +126,11 @@ cond_syscall(sys_vm86);
cond_syscall(compat_sys_ipc);
cond_syscall(compat_sys_sysctl);
cond_syscall(sys_flock);
+cond_syscall(sys_io_setup);
+cond_syscall(sys_io_destroy);
+cond_syscall(sys_io_submit);
+cond_syscall(sys_io_cancel);
+cond_syscall(sys_io_getevents);
/* arch-specific weak syscall entries */
cond_syscall(sys_pciconfig_read);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 9792c315676..617d41e4d6a 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1281,6 +1281,7 @@ static struct ctl_table fs_table[] = {
.extra2 = &two,
},
#endif
+#ifdef CONFIG_AIO
{
.procname = "aio-nr",
.data = &aio_nr,
@@ -1295,6 +1296,7 @@ static struct ctl_table fs_table[] = {
.mode = 0644,
.proc_handler = &proc_doulongvec_minmax,
},
+#endif /* CONFIG_AIO */
#ifdef CONFIG_INOTIFY_USER
{
.ctl_name = FS_INOTIFY,