Trivial bug/fix for shm.c

[Eric Weigle <ehw@lanl.gov>]

I couldn't find the maintainer for this, so I'm sending it to the list.

Problem: ipc/shm.c currently assumes proc filesystem exists, so if
CONFIG_PROC_FS is not defined, it will not compile. The function shm_init calls
create_proc_read_entry without checking if CONFIG_PROC_FS defined; if it isn't
defined that functionality should not be referenced.

Solution: add appropriate #ifdef around that line:

--------------------------------------------------------------------------------
--- kernel-2.4.2/ipc/shm.c.orig Thu Feb 22 13:13:47 2001
+++ kernel-2.4.2/ipc/shm.c  Thu Feb 22 13:13:57 2001
@@ -71,7 +71,9 @@
 void __init shm_init (void)
 {
    ipc_init_ids(&shm_ids, 1);
+#ifdef CONFIG_PROC_FS
    create_proc_read_entry("sysvipc/shm", 0, 0, sysvipc_shm_read_proc, NULL);
+#endif
 }

 static inline int shm_checkid(struct shmid_kernel *s, int id)
--------------------------------------------------------------------------------

I encountered this bug while creating a vastly hacked-down special purpose
kernel without /proc support.


Thanks,
-Eric Weigle

--------------------------------------------
 Eric H. Weigle   CCS-1, RADIANT team
 ehw@lanl.gov     Los Alamos National Lab
 (505) 665-4937   http://home.lanl.gov/ehw/
--------------------------------------------