diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 40 | ||||
| -rw-r--r-- | init/Makefile | 8 | ||||
| -rw-r--r-- | init/initramfs.c | 10 | ||||
| -rw-r--r-- | init/main.c | 25 | ||||
| -rw-r--r-- | init/version.c | 4 |
5 files changed, 56 insertions, 31 deletions
diff --git a/init/Kconfig b/init/Kconfig index 54c655ce9c04..d95ca7cd5d45 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -115,10 +115,13 @@ config HAVE_KERNEL_BZIP2 config HAVE_KERNEL_LZMA bool +config HAVE_KERNEL_LZO + bool + choice prompt "Kernel compression mode" default KERNEL_GZIP - depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA + depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_LZO help The linux kernel is a kind of self-extracting executable. Several compression algorithms are available, which differ @@ -141,9 +144,8 @@ config KERNEL_GZIP bool "Gzip" depends on HAVE_KERNEL_GZIP help - The old and tried gzip compression. Its compression ratio is - the poorest among the 3 choices; however its speed (both - compression and decompression) is the fastest. + The old and tried gzip compression. It provides a good balance + between compression ratio and decompression speed. config KERNEL_BZIP2 bool "Bzip2" @@ -164,6 +166,14 @@ config KERNEL_LZMA two. Compression is slowest. The kernel size is about 33% smaller with LZMA in comparison to gzip. +config KERNEL_LZO + bool "LZO" + depends on HAVE_KERNEL_LZO + help + Its compression ratio is the poorest among the 4. The kernel + size is about about 10% bigger than gzip; however its speed + (both compression and decompression) is the fastest. + endchoice config SWAP @@ -1079,6 +1089,28 @@ config SLOB endchoice +config MMAP_ALLOW_UNINITIALIZED + bool "Allow mmapped anonymous memory to be uninitialized" + depends on EMBEDDED && !MMU + default n + help + Normally, and according to the Linux spec, anonymous memory obtained + from mmap() has it's contents cleared before it is passed to + userspace. Enabling this config option allows you to request that + mmap() skip that if it is given an MAP_UNINITIALIZED flag, thus + providing a huge performance boost. If this option is not enabled, + then the flag will be ignored. + + This is taken advantage of by uClibc's malloc(), and also by + ELF-FDPIC binfmt's brk and stack allocator. + + Because of the obvious security issues, this option should only be + enabled on embedded devices where you control what is run in + userspace. Since that isn't generally a problem on no-MMU systems, + it is normally safe to say Y here. + + See Documentation/nommu-mmap.txt for more information. + config PROFILING bool "Profiling support (EXPERIMENTAL)" help diff --git a/init/Makefile b/init/Makefile index 4a243df426f7..0bf677aa0872 100644 --- a/init/Makefile +++ b/init/Makefile @@ -15,12 +15,8 @@ mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o mounts-$(CONFIG_BLK_DEV_MD) += do_mounts_md.o -# files to be removed upon make clean -clean-files := ../include/linux/compile.h - # dependencies on generated files need to be listed explicitly - -$(obj)/version.o: include/linux/compile.h +$(obj)/version.o: include/generated/compile.h # compile.h changes depending on hostname, generation number, etc, # so we regenerate it always. @@ -30,7 +26,7 @@ $(obj)/version.o: include/linux/compile.h chk_compile.h = : quiet_chk_compile.h = echo ' CHK $@' silent_chk_compile.h = : -include/linux/compile.h: FORCE +include/generated/compile.h: FORCE @$($(quiet)chk_compile.h) $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \ "$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(KBUILD_CFLAGS)" diff --git a/init/initramfs.c b/init/initramfs.c index 4c00edc59689..b37d34beb90b 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -413,7 +413,7 @@ static unsigned my_inptr; /* index of next byte to be processed in inbuf */ static char * __init unpack_to_rootfs(char *buf, unsigned len) { - int written; + int written, res; decompress_fn decompress; const char *compress_name; static __initdata char msg_buf[64]; @@ -445,10 +445,12 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len) } this_header = 0; decompress = decompress_method(buf, len, &compress_name); - if (decompress) - decompress(buf, len, NULL, flush_buffer, NULL, + if (decompress) { + res = decompress(buf, len, NULL, flush_buffer, NULL, &my_inptr, error); - else if (compress_name) { + if (res) + error("decompressor failed"); + } else if (compress_name) { if (!message) { snprintf(msg_buf, sizeof msg_buf, "compression method %s not configured", diff --git a/init/main.c b/init/main.c index 4051d75dd2d6..dac44a9356a5 100644 --- a/init/main.c +++ b/init/main.c @@ -369,12 +369,6 @@ static void __init smp_init(void) { unsigned int cpu; - /* - * Set up the current CPU as possible to migrate to. - * The other ones will be done by cpu_up/cpu_down() - */ - set_cpu_active(smp_processor_id(), true); - /* FIXME: This should be done in userspace --RR */ for_each_present_cpu(cpu) { if (num_online_cpus() >= setup_max_cpus) @@ -486,6 +480,7 @@ static void __init boot_cpu_init(void) int cpu = smp_processor_id(); /* Mark the boot cpu "present", "online" etc for SMP and UP case */ set_cpu_online(cpu, true); + set_cpu_active(cpu, true); set_cpu_present(cpu, true); set_cpu_possible(cpu, true); } @@ -691,10 +686,10 @@ asmlinkage void __init start_kernel(void) static void __init do_ctors(void) { #ifdef CONFIG_CONSTRUCTORS - ctor_fn_t *call = (ctor_fn_t *) __ctors_start; + ctor_fn_t *fn = (ctor_fn_t *) __ctors_start; - for (; call < (ctor_fn_t *) __ctors_end; call++) - (*call)(); + for (; fn < (ctor_fn_t *) __ctors_end; fn++) + (*fn)(); #endif } @@ -755,10 +750,10 @@ extern initcall_t __initcall_start[], __initcall_end[], __early_initcall_end[]; static void __init do_initcalls(void) { - initcall_t *call; + initcall_t *fn; - for (call = __early_initcall_end; call < __initcall_end; call++) - do_one_initcall(*call); + for (fn = __early_initcall_end; fn < __initcall_end; fn++) + do_one_initcall(*fn); /* Make sure there is no pending stuff from the initcall sequence */ flush_scheduled_work(); @@ -785,10 +780,10 @@ static void __init do_basic_setup(void) static void __init do_pre_smp_initcalls(void) { - initcall_t *call; + initcall_t *fn; - for (call = __initcall_start; call < __early_initcall_end; call++) - do_one_initcall(*call); + for (fn = __initcall_start; fn < __early_initcall_end; fn++) + do_one_initcall(*fn); } static void run_init_process(char *init_filename) diff --git a/init/version.c b/init/version.c index 52a8b98642b8..adff586401a5 100644 --- a/init/version.c +++ b/init/version.c @@ -6,11 +6,11 @@ * May be freely distributed as part of Linux. */ -#include <linux/compile.h> +#include <generated/compile.h> #include <linux/module.h> #include <linux/uts.h> #include <linux/utsname.h> -#include <linux/utsrelease.h> +#include <generated/utsrelease.h> #include <linux/version.h> #ifndef CONFIG_KALLSYMS |