Re: [PATCH] New version of mmid patch, against 2.3.12

cd_smith@ou.edu
Thu, 29 Jul 1999 21:09:07 -0500 (CDT)

On Thu, 29 Jul 1999, Jeff Garzik wrote:
> If you are casting mmid to a long, it should be a long, not an int. Not
> good for 64-bit platforms...

Okay, yeah. I'm dumb. And the fix is obvious, but here's the new patch
just for the record.

Chris Smith <cd_smith@ou.edu>

diff -Nru linux-save/fs/proc/array.c linux/fs/proc/array.c
--- linux-save/fs/proc/array.c Thu Jul 29 08:55:55 1999
+++ linux/fs/proc/array.c Thu Jul 29 15:31:46 1999
@@ -1079,6 +1079,23 @@
size, resident, share, trs, lrs, drs, dt);
}

+static int get_mm_id(int pid, char * buffer)
+{
+ struct task_struct *tsk;
+ unsigned long mm_id = 0;
+
+ read_lock(&tasklist_lock);
+ tsk = find_task_by_pid(pid);
+ read_unlock(&tasklist_lock);
+
+ if (!tsk)
+ return 0;
+ if (tsk->mm && tsk->mm != &init_mm)
+ mm_id = (unsigned long) tsk->mm;
+
+ return sprintf(buffer,"%lu\n", mm_id);
+}
+
/*
* The way we support synthetic files > 4K
* - without storing their contents in some buffer and
@@ -1441,6 +1458,8 @@
return get_stat(pid, page);
case PROC_PID_STATM:
return get_statm(pid, page);
+ case PROC_PID_MM_ID:
+ return get_mm_id(pid, page);
#ifdef __SMP__
case PROC_PID_CPU:
return get_pidcpu(pid, page);
diff -Nru linux-save/fs/proc/base.c linux/fs/proc/base.c
--- linux-save/fs/proc/base.c Sat Jun 26 14:04:39 1999
+++ linux/fs/proc/base.c Thu Jul 29 09:12:08 1999
@@ -159,6 +159,12 @@
0, &proc_arraylong_inode_operations,
NULL, proc_pid_fill_inode,
};
+static struct proc_dir_entry proc_pid_mm_id = {
+ PROC_PID_MM_ID, 5, "mm_id",
+ S_IFREG | S_IRUGO, 1, 0, 0,
+ 0, &proc_array_inode_operations,
+ NULL, proc_pid_fill_inode,
+};

#if CONFIG_AP1000
static struct proc_dir_entry proc_pid_ringbuf = {
@@ -194,6 +200,7 @@
proc_register(&proc_pid, &proc_pid_stat);
proc_register(&proc_pid, &proc_pid_statm);
proc_register(&proc_pid, &proc_pid_maps);
+ proc_register(&proc_pid, &proc_pid_mm_id);
#ifdef __SMP__
proc_register(&proc_pid, &proc_pid_cpu);
#endif
diff -Nru linux-save/include/linux/proc_fs.h linux/include/linux/proc_fs.h
--- linux-save/include/linux/proc_fs.h Wed Jul 7 11:21:05 1999
+++ linux/include/linux/proc_fs.h Thu Jul 29 15:31:55 1999
@@ -70,6 +70,7 @@
PROC_PID_STAT,
PROC_PID_STATM,
PROC_PID_MAPS,
+ PROC_PID_MM_ID,
#if CONFIG_AP1000
PROC_PID_RINGBUF,
#endif

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