kernel/hung_task: fix address space of proc_dohung_task_timeout_secs

The proc_dohung_task_timeout_secs() function is incorrectly marked
as having a __user buffer as argument 3. However this is not the
case and it is casing multiple sparse warnings. Fix the following
warnings by removing __user from the argument:

kernel/hung_task.c:237:52: warning: incorrect type in argument 3 (different address spaces)
kernel/hung_task.c:237:52:    expected void *
kernel/hung_task.c:237:52:    got void [noderef] __user *buffer
kernel/hung_task.c:287:35: warning: incorrect type in initializer (incompatible argument 3 (different address spaces))
kernel/hung_task.c:287:35:    expected int ( [usertype] *proc_handler )( ... )
kernel/hung_task.c:287:35:    got int ( * )( ... )
kernel/hung_task.c:295:35: warning: incorrect type in initializer (incompatible argument 3 (different address spaces))
kernel/hung_task.c:295:35:    expected int ( [usertype] *proc_handler )( ... )
kernel/hung_task.c:295:35:    got int ( * )( ... )

Link: https://lkml.kernel.org/r/20220714074744.189017-1-ben.dooks@sifive.com
Signed-off-by: Ben Dooks <ben.dooks@sifive.com>
Cc: <Conor.Dooley@microchip.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index cff3ae8c818fd323d611b0845afeea6d958ee94c..bb2354f73dedcaf2c2d82ebebca2d5b9b86d2bf0 100644 (file)
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -229,7 +229,7 @@ static long hung_timeout_jiffies(unsigned long last_checked,
  * Process updating of timeout sysctl
  */
 static int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
-                                 void __user *buffer,
+                                 void *buffer,
                                  size_t *lenp, loff_t *ppos)
 {
        int ret;