diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 45 | ||||
| -rw-r--r-- | init/calibrate.c | 9 | ||||
| -rw-r--r-- | init/do_mounts.c | 3 | ||||
| -rw-r--r-- | init/initramfs.c | 5 | ||||
| -rw-r--r-- | init/main.c | 2 |
5 files changed, 45 insertions, 19 deletions
diff --git a/init/Kconfig b/init/Kconfig index dcc96a8c8c6..92b23e25661 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -541,6 +541,18 @@ config ELF_CORE help Enable support for generating core dumps. Disabling saves about 4k. +config COMPAT_BRK + bool "Disable heap randomization" + default y + help + Randomizing heap placement makes heap exploits harder, but it + also breaks ancient binaries (including anything libc5 based). + This option changes the bootup default to heap randomization + disabled, and can be overriden runtime by setting + /proc/sys/kernel/randomize_va_space to 2. + + On non-ancient distros (post-2000 ones) Y is usually a safe choice. + config BASE_FULL default y bool "Enable full-sized data structures for core" if EMBEDDED @@ -582,7 +594,6 @@ config SIGNALFD config TIMERFD bool "Enable timerfd() system call" if EMBEDDED select ANON_INODES - depends on BROKEN default y help Enable the timerfd() system call that allows to receive timer @@ -657,14 +668,36 @@ config SLOB depends on EMBEDDED bool "SLOB (Simple Allocator)" help - SLOB replaces the SLAB allocator with a drastically simpler - allocator. SLOB is more space efficient than SLAB but does not - scale well (single lock for all operations) and is also highly - susceptible to fragmentation. SLUB can accomplish a higher object - density. It is usually better to use SLUB instead of SLOB. + SLOB replaces the stock allocator with a drastically simpler + allocator. SLOB is generally more space efficient but + does not perform as well on large systems. endchoice +config PROFILING + bool "Profiling support (EXPERIMENTAL)" + help + Say Y here to enable the extended profiling support mechanisms used + by profilers such as OProfile. + +config MARKERS + bool "Activate markers" + help + Place an empty function call at each marker site. Can be + dynamically changed for a probe function. + +source "arch/Kconfig" + +config PROC_PAGE_MONITOR + default y + depends on PROC_FS && MMU + bool "Enable /proc page monitoring" if EMBEDDED + help + Various /proc files exist to monitor process memory utilization: + /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap, + /proc/kpagecount, and /proc/kpageflags. Disabling these + interfaces will reduce the size of the kernel by approximately 4kb. + endmenu # General setup config SLABINFO diff --git a/init/calibrate.c b/init/calibrate.c index 2d3d73bd4ce..ecb3822d4f7 100644 --- a/init/calibrate.c +++ b/init/calibrate.c @@ -7,8 +7,7 @@ #include <linux/jiffies.h> #include <linux/delay.h> #include <linux/init.h> - -#include <asm/timex.h> +#include <linux/timex.h> unsigned long preset_lpj; static int __init lpj_setup(char *str) @@ -29,7 +28,7 @@ __setup("lpj=", lpj_setup); #define DELAY_CALIBRATION_TICKS ((HZ < 100) ? 1 : (HZ/100)) #define MAX_DIRECT_CALIBRATION_RETRIES 5 -static unsigned long __devinit calibrate_delay_direct(void) +static unsigned long __cpuinit calibrate_delay_direct(void) { unsigned long pre_start, start, post_start; unsigned long pre_end, end, post_end; @@ -102,7 +101,7 @@ static unsigned long __devinit calibrate_delay_direct(void) return 0; } #else -static unsigned long __devinit calibrate_delay_direct(void) {return 0;} +static unsigned long __cpuinit calibrate_delay_direct(void) {return 0;} #endif /* @@ -112,7 +111,7 @@ static unsigned long __devinit calibrate_delay_direct(void) {return 0;} */ #define LPS_PREC 8 -void __devinit calibrate_delay(void) +void __cpuinit calibrate_delay(void) { unsigned long ticks, loopbit; int lps_precision = LPS_PREC; diff --git a/init/do_mounts.c b/init/do_mounts.c index 1161dfd7b0d..f86573126f8 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -11,6 +11,7 @@ #include <linux/mount.h> #include <linux/device.h> #include <linux/init.h> +#include <linux/fs.h> #include <linux/nfs_fs.h> #include <linux/nfs_fs_sb.h> @@ -18,8 +19,6 @@ #include "do_mounts.h" -extern int get_filesystem_list(char * buf); - int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */ int root_mountflags = MS_RDONLY | MS_SILENT; diff --git a/init/initramfs.c b/init/initramfs.c index 1db02a0025d..d53fee8d860 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -503,7 +503,6 @@ static int __init retain_initrd_param(char *str) __setup("retain_initrd", retain_initrd_param); extern char __initramfs_start[], __initramfs_end[]; -#ifdef CONFIG_BLK_DEV_INITRD #include <linux/initrd.h> #include <linux/kexec.h> @@ -539,15 +538,12 @@ skip: initrd_end = 0; } -#endif - static int __init populate_rootfs(void) { char *err = unpack_to_rootfs(__initramfs_start, __initramfs_end - __initramfs_start, 0); if (err) panic(err); -#ifdef CONFIG_BLK_DEV_INITRD if (initrd_start) { #ifdef CONFIG_BLK_DEV_RAM int fd; @@ -579,7 +575,6 @@ static int __init populate_rootfs(void) free_initrd(); #endif } -#endif return 0; } rootfs_initcall(populate_rootfs); diff --git a/init/main.c b/init/main.c index cb81ed116f6..c691f5f7fc2 100644 --- a/init/main.c +++ b/init/main.c @@ -57,6 +57,7 @@ #include <linux/device.h> #include <linux/kthread.h> #include <linux/sched.h> +#include <linux/signal.h> #include <asm/io.h> #include <asm/bugs.h> @@ -83,7 +84,6 @@ extern void init_IRQ(void); extern void fork_init(unsigned long); extern void mca_init(void); extern void sbus_init(void); -extern void signals_init(void); extern void pidhash_init(void); extern void pidmap_init(void); extern void prio_tree_init(void); |