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-rw-r--r--init/Kconfig40
-rw-r--r--init/do_mounts.c9
-rw-r--r--init/main.c9
3 files changed, 44 insertions, 14 deletions
diff --git a/init/Kconfig b/init/Kconfig
index f5dbc6d4261b..dc24dec60232 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -394,6 +394,7 @@ endchoice
config BSD_PROCESS_ACCT
bool "BSD Process Accounting"
+ depends on MULTIUSER
help
If you say Y here, a user level program will be able to instruct the
kernel (via a special system call) to write process accounting
@@ -420,6 +421,7 @@ config BSD_PROCESS_ACCT_V3
config TASKSTATS
bool "Export task/process statistics through netlink"
depends on NET
+ depends on MULTIUSER
default n
help
Export selected statistics for tasks/processes through the
@@ -791,6 +793,19 @@ config RCU_NOCB_CPU_ALL
endchoice
+config RCU_EXPEDITE_BOOT
+ bool
+ default n
+ help
+ This option enables expedited grace periods at boot time,
+ as if rcu_expedite_gp() had been invoked early in boot.
+ The corresponding rcu_unexpedite_gp() is invoked from
+ rcu_end_inkernel_boot(), which is intended to be invoked
+ at the end of the kernel-only boot sequence, just before
+ init is exec'ed.
+
+ Accept the default if unsure.
+
endmenu # "RCU Subsystem"
config BUILD_BIN2C
@@ -1032,12 +1047,6 @@ config MEMCG_KMEM
the kmem extension can use it to guarantee that no group of processes
will ever exhaust kernel resources alone.
- WARNING: Current implementation lacks reclaim support. That means
- allocation attempts will fail when close to the limit even if there
- are plenty of kmem available for reclaim. That makes this option
- unusable in real life so DO NOT SELECT IT unless for development
- purposes.
-
config CGROUP_HUGETLB
bool "HugeTLB Resource Controller for Control Groups"
depends on HUGETLB_PAGE
@@ -1147,6 +1156,7 @@ config CHECKPOINT_RESTORE
menuconfig NAMESPACES
bool "Namespaces support" if EXPERT
+ depends on MULTIUSER
default !EXPERT
help
Provides the way to make tasks work with different objects using
@@ -1343,11 +1353,25 @@ menuconfig EXPERT
config UID16
bool "Enable 16-bit UID system calls" if EXPERT
- depends on HAVE_UID16
+ depends on HAVE_UID16 && MULTIUSER
default y
help
This enables the legacy 16-bit UID syscall wrappers.
+config MULTIUSER
+ bool "Multiple users, groups and capabilities support" if EXPERT
+ default y
+ help
+ This option enables support for non-root users, groups and
+ capabilities.
+
+ If you say N here, all processes will run with UID 0, GID 0, and all
+ possible capabilities. Saying N here also compiles out support for
+ system calls related to UIDs, GIDs, and capabilities, such as setuid,
+ setgid, and capset.
+
+ If unsure, say Y here.
+
config SGETMASK_SYSCALL
bool "sgetmask/ssetmask syscalls support" if EXPERT
def_bool PARISC || MN10300 || BLACKFIN || M68K || PPC || MIPS || X86 || SPARC || CRIS || MICROBLAZE || SUPERH
@@ -1513,7 +1537,7 @@ config EVENTFD
# syscall, maps, verifier
config BPF_SYSCALL
- bool "Enable bpf() system call" if EXPERT
+ bool "Enable bpf() system call"
select ANON_INODES
select BPF
default n
diff --git a/init/do_mounts.c b/init/do_mounts.c
index eb410083e8e0..a95bbdb2a502 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -207,7 +207,7 @@ done:
* bangs.
*/
-dev_t name_to_dev_t(char *name)
+dev_t name_to_dev_t(const char *name)
{
char s[32];
char *p;
@@ -225,9 +225,11 @@ dev_t name_to_dev_t(char *name)
#endif
if (strncmp(name, "/dev/", 5) != 0) {
- unsigned maj, min;
+ unsigned maj, min, offset;
+ char dummy;
- if (sscanf(name, "%u:%u", &maj, &min) == 2) {
+ if ((sscanf(name, "%u:%u%c", &maj, &min, &dummy) == 2) ||
+ (sscanf(name, "%u:%u:%u:%c", &maj, &min, &offset, &dummy) == 3)) {
res = MKDEV(maj, min);
if (maj != MAJOR(res) || min != MINOR(res))
goto fail;
@@ -286,6 +288,7 @@ fail:
done:
return res;
}
+EXPORT_SYMBOL_GPL(name_to_dev_t);
static int __init root_dev_setup(char *line)
{
diff --git a/init/main.c b/init/main.c
index 4a6974e67839..2115055faeac 100644
--- a/init/main.c
+++ b/init/main.c
@@ -80,6 +80,7 @@
#include <linux/list.h>
#include <linux/integrity.h>
#include <linux/proc_ns.h>
+#include <linux/io.h>
#include <asm/io.h>
#include <asm/bugs.h>
@@ -90,7 +91,7 @@
static int kernel_init(void *);
extern void init_IRQ(void);
-extern void fork_init(unsigned long);
+extern void fork_init(void);
extern void radix_tree_init(void);
#ifndef CONFIG_DEBUG_RODATA
static inline void mark_rodata_ro(void) { }
@@ -143,7 +144,7 @@ EXPORT_SYMBOL_GPL(static_key_initialized);
* rely on the BIOS and skip the reset operation.
*
* This is useful if kernel is booting in an unreliable environment.
- * For ex. kdump situaiton where previous kernel has crashed, BIOS has been
+ * For ex. kdump situation where previous kernel has crashed, BIOS has been
* skipped and devices will be in unknown state.
*/
unsigned int reset_devices;
@@ -384,6 +385,7 @@ static noinline void __init_refok rest_init(void)
int pid;
rcu_scheduler_starting();
+ smpboot_thread_init();
/*
* We need to spawn init first so that it obtains pid 1, however
* the init task will end up wanting to create kthreads, which, if
@@ -484,6 +486,7 @@ static void __init mm_init(void)
percpu_init_late();
pgtable_init();
vmalloc_init();
+ ioremap_huge_init();
}
asmlinkage __visible void __init start_kernel(void)
@@ -642,7 +645,7 @@ asmlinkage __visible void __init start_kernel(void)
#endif
thread_info_cache_init();
cred_init();
- fork_init(totalram_pages);
+ fork_init();
proc_caches_init();
buffer_init();
key_init();