sys_sysfs: Add CONFIG_SYSFS_SYSCALL

sys_sysfs is an obsolete system call no longer supported by libc.

 - This patch adds a default CONFIG_SYSFS_SYSCALL=y

 - Option can be turned off in expert mode.

 - cond_syscall added to kernel/sys_ni.c

[akpm@linux-foundation.org: tweak Kconfig help text]
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index d56cb03c1b49..e45cc62904b3 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1290,6 +1290,16 @@ config UID16
         help
           This enables the legacy 16-bit UID syscall wrappers.
 
+config SYSFS_SYSCALL
+        bool "Sysfs syscall support" if EXPERT
+        default y
+        ---help---
+          sys_sysfs is an obsolete system call no longer supported in libc.
+          Note that disabling this option is more secure but might break
+          compatibility with some systems.
+
+          If unsure say Y here.
+
 config SYSCTL_SYSCALL
         bool "Sysctl syscall support" if EXPERT
         depends on PROC_SYSCTL