X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=kernel%2Fsysctl.c;h=98ecf35d5bf2e47670d13d1b777b0fc95c0eb2e5;hb=d254117099d711f215e62427f55dfb8ebd5ad011;hp=4286b62b34a0a2d0f9a00f96ae2e8822647238bf;hpb=7b11428d37fe65643172feff66cd0a4d72d1932a;p=karo-tx-linux.git

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 4286b62b34a0..98ecf35d5bf2 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -103,6 +103,9 @@ static unsigned long one_ul = 1;
 static int one_hundred = 100;
 static int one_thousand = 1000;
 
+/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
+static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
+
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
 static int maxolduid = 65535;
 static int minolduid;
@@ -112,6 +115,7 @@ static int ngroups_max = NGROUPS_MAX;
 
 #ifdef CONFIG_MODULES
 extern char modprobe_path[];
+extern int modules_disabled;
 #endif
 #ifdef CONFIG_CHR_DEV_SG
 extern int sg_big_buff;
@@ -532,6 +536,17 @@ static struct ctl_table kern_table[] = {
 		.proc_handler	= &proc_dostring,
 		.strategy	= &sysctl_string,
 	},
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "modules_disabled",
+		.data		= &modules_disabled,
+		.maxlen		= sizeof(int),
+		.mode		= 0644,
+		/* only handle a transition from default "0" to "1" */
+		.proc_handler	= &proc_dointvec_minmax,
+		.extra1		= &one,
+		.extra2		= &one,
+	},
 #endif
 #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
 	{
@@ -902,16 +917,6 @@ static struct ctl_table kern_table[] = {
 		.proc_handler   = &proc_dointvec,
 	},
 #endif
-#ifdef CONFIG_UNEVICTABLE_LRU
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "scan_unevictable_pages",
-		.data		= &scan_unevictable_pages,
-		.maxlen		= sizeof(scan_unevictable_pages),
-		.mode		= 0644,
-		.proc_handler	= &scan_unevictable_handler,
-	},
-#endif
 #ifdef CONFIG_SLOW_WORK
 	{
 		.ctl_name	= CTL_UNNUMBERED,
@@ -1016,7 +1021,7 @@ static struct ctl_table vm_table[] = {
 		.mode		= 0644,
 		.proc_handler	= &dirty_bytes_handler,
 		.strategy	= &sysctl_intvec,
-		.extra1		= &one_ul,
+		.extra1		= &dirty_bytes_min,
 	},
 	{
 		.procname	= "dirty_writeback_centisecs",
@@ -1302,6 +1307,16 @@ static struct ctl_table vm_table[] = {
 		.extra2		= &one,
 	},
 #endif
+#ifdef CONFIG_UNEVICTABLE_LRU
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "scan_unevictable_pages",
+		.data		= &scan_unevictable_pages,
+		.maxlen		= sizeof(scan_unevictable_pages),
+		.mode		= 0644,
+		.proc_handler	= &scan_unevictable_handler,
+	},
+#endif
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt