mm: add dirty_background_bytes and dirty_bytes sysctls

[firefly-linux-kernel-4.4.55.git] / kernel / sysctl.c

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index ff6d45c7626f09e183913072f0649d075f028c6a..92f6e5bc3c24f2700b88e31a689f642a83a29a4b 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -87,10 +87,6 @@ extern int rcutorture_runnable;
 #endif /* #ifdef CONFIG_RCU_TORTURE_TEST */
 
 /* Constants used for minimum and  maximum */
-#if defined(CONFIG_HIGHMEM) || defined(CONFIG_DETECT_SOFTLOCKUP)
-static int one = 1;
-#endif
-
 #ifdef CONFIG_DETECT_SOFTLOCKUP
 static int sixty = 60;
 static int neg_one = -1;
@@ -101,6 +97,7 @@ static int two = 2;
 #endif
 
 static int zero;
+static int one = 1;
 static int one_hundred = 100;
 
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
@@ -952,11 +949,21 @@ static struct ctl_table vm_table[] = {
                .data           = &dirty_background_ratio,
                .maxlen         = sizeof(dirty_background_ratio),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec_minmax,
+               .proc_handler   = &dirty_background_ratio_handler,
                .strategy       = &sysctl_intvec,
                .extra1         = &zero,
                .extra2         = &one_hundred,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "dirty_background_bytes",
+               .data           = &dirty_background_bytes,
+               .maxlen         = sizeof(dirty_background_bytes),
+               .mode           = 0644,
+               .proc_handler   = &dirty_background_bytes_handler,
+               .strategy       = &sysctl_intvec,
+               .extra1         = &one,
+       },
        {
                .ctl_name       = VM_DIRTY_RATIO,
                .procname       = "dirty_ratio",
@@ -968,6 +975,16 @@ static struct ctl_table vm_table[] = {
                .extra1         = &zero,
                .extra2         = &one_hundred,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "dirty_bytes",
+               .data           = &vm_dirty_bytes,
+               .maxlen         = sizeof(vm_dirty_bytes),
+               .mode           = 0644,
+               .proc_handler   = &dirty_bytes_handler,
+               .strategy       = &sysctl_intvec,
+               .extra1         = &one,
+       },
        {
                .procname       = "dirty_writeback_centisecs",
                .data           = &dirty_writeback_interval,