The patch titled
sysctl: allow embedded targets to disable sysctl_check.c
has been added to the -mm tree. Its filename is
sysctl-allow-embedded-targets-to-disable-sysctl_checkc.patch
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------------------------------------------------------
Subject: sysctl: allow embedded targets to disable sysctl_check.c
From: Holger Schurig <hs4233@xxxxxxxxxxxxxxxxxxxx>
Disable sysctl_check.c for embedded targets. This saves about about 11 kB
in .text and another 11 kB in .data on a PXA255 embedded platform.
Signed-off-by: Holger Schurig <hs4233@xxxxxxxxxxxxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
init/Kconfig | 11 +++++++++++
kernel/Makefile | 2 +-
kernel/sysctl.c | 10 ++++++++--
3 files changed, 20 insertions(+), 3 deletions(-)
diff -puN init/Kconfig~sysctl-allow-embedded-targets-to-disable-sysctl_checkc init/Kconfig
--- a/init/Kconfig~sysctl-allow-embedded-targets-to-disable-sysctl_checkc
+++ a/init/Kconfig
@@ -511,6 +511,17 @@ config SYSCTL_SYSCALL
If unsure say Y here.
+config SYSCTL_SYSCALL_CHECK
+ bool "Sysctl checks" if EMBEDDED
+ depends on SYSCTL_SYSCALL
+ default y
+ ---help---
+ sys_sysctl uses binary paths that have been found challenging
+ to properly maintain and use. This enables checks that help
+ you to keep things correct.
+
+ If unsure say Y here.
+
config KALLSYMS
bool "Load all symbols for debugging/ksymoops" if EMBEDDED
default y
diff -puN kernel/Makefile~sysctl-allow-embedded-targets-to-disable-sysctl_checkc kernel/Makefile
--- a/kernel/Makefile~sysctl-allow-embedded-targets-to-disable-sysctl_checkc
+++ a/kernel/Makefile
@@ -11,7 +11,7 @@ obj-y = sched.o fork.o exec_domain.o
hrtimer.o rwsem.o nsproxy.o srcu.o \
notifier.o ksysfs.o pm_qos_params.o
-obj-$(CONFIG_SYSCTL) += sysctl_check.o
+obj-$(CONFIG_SYSCTL_SYSCALL_CHECK) += sysctl_check.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-y += time/
obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o
diff -puN kernel/sysctl.c~sysctl-allow-embedded-targets-to-disable-sysctl_checkc kernel/sysctl.c
--- a/kernel/sysctl.c~sysctl-allow-embedded-targets-to-disable-sysctl_checkc
+++ a/kernel/sysctl.c
@@ -1612,9 +1612,13 @@ static void sysctl_set_parent(struct ctl
static __init int sysctl_init(void)
{
- int err;
sysctl_set_parent(NULL, root_table);
- err = sysctl_check_table(current->nsproxy, root_table);
+#ifdef CONFIG_SYSCTL_SYSCALL_CHECK
+ {
+ int err;
+ err = sysctl_check_table(current->nsproxy, root_table);
+ }
+#endif
return 0;
}
@@ -1741,10 +1745,12 @@ struct ctl_table_header *__register_sysc
header->unregistering = NULL;
header->root = root;
sysctl_set_parent(NULL, header->ctl_table);
+#ifdef CONFIG_SYSCTL_SYSCALL_CHECK
if (sysctl_check_table(namespaces, header->ctl_table)) {
kfree(header);
return NULL;
}
+#endif
spin_lock(&sysctl_lock);
header_list = lookup_header_list(root, namespaces);
list_add_tail(&header->ctl_entry, header_list);
_
Patches currently in -mm which might be from hs4233@xxxxxxxxxxxxxxxxxxxx are
origin.patch
sysctl-allow-embedded-targets-to-disable-sysctl_checkc.patch
-
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