[sysctl] Fix breakage on systems with older glibc

As predicted during code review, the sysctl(2) changes made systems with
old glibc nearly unusable.  About every command gives a:

  warning: process `ls' used the deprecated sysctl system call with 1.4

warning in the log.

I see this on a SUSE 10.0 system with glibc 2.3.5.

Don't warn for this common case.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c
index b75dbf40f5733411780b79bbce43c84f8918687e..112533d5fc08a2e91adec8d4242c8e241f796c89 100644 (file)
--- a/kernel/sysctl_binary.c
+++ b/kernel/sysctl_binary.c
@@ -1399,6 +1399,13 @@ static void deprecated_sysctl_warning(const int *name, int nlen)
 {
        int i;
 
+       /*
+        * CTL_KERN/KERN_VERSION is used by older glibc and cannot
+        * ever go away.
+        */
+       if (name[0] == CTL_KERN && name[1] == KERN_VERSION)
+               return;
+
        if (printk_ratelimit()) {
                printk(KERN_INFO
                        "warning: process `%s' used the deprecated sysctl "