diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 15 | ||||
| -rw-r--r-- | init/initramfs.c | 34 | ||||
| -rw-r--r-- | init/main.c | 4 |
3 files changed, 32 insertions, 21 deletions
diff --git a/init/Kconfig b/init/Kconfig index d2355812ba48..3ee28ae02cc8 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -507,6 +507,16 @@ config PREEMPT_RCU This option enables preemptible-RCU code that is common between TREE_PREEMPT_RCU and, in the old days, TINY_PREEMPT_RCU. +config TASKS_RCU + bool "Task_based RCU implementation using voluntary context switch" + default n + help + This option enables a task-based RCU implementation that uses + only voluntary context switch (not preemption!), idle, and + user-mode execution as quiescent states. + + If unsure, say N. + config RCU_STALL_COMMON def_bool ( TREE_RCU || TREE_PREEMPT_RCU || RCU_TRACE ) help @@ -737,7 +747,7 @@ choice config RCU_NOCB_CPU_NONE bool "No build_forced no-CBs CPUs" - depends on RCU_NOCB_CPU && !NO_HZ_FULL_ALL + depends on RCU_NOCB_CPU help This option does not force any of the CPUs to be no-CBs CPUs. Only CPUs designated by the rcu_nocbs= boot parameter will be @@ -751,7 +761,7 @@ config RCU_NOCB_CPU_NONE config RCU_NOCB_CPU_ZERO bool "CPU 0 is a build_forced no-CBs CPU" - depends on RCU_NOCB_CPU && !NO_HZ_FULL_ALL + depends on RCU_NOCB_CPU help This option forces CPU 0 to be a no-CBs CPU, so that its RCU callbacks are invoked by a per-CPU kthread whose name begins @@ -828,6 +838,7 @@ config LOG_BUF_SHIFT config LOG_CPU_MAX_BUF_SHIFT int "CPU kernel log buffer size contribution (13 => 8 KB, 17 => 128KB)" + depends on SMP range 0 21 default 12 if !BASE_SMALL default 0 if BASE_SMALL diff --git a/init/initramfs.c b/init/initramfs.c index bece48c3461e..ad1bd7787bbb 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -197,14 +197,14 @@ static __initdata enum state { } state, next_state; static __initdata char *victim; -static unsigned long count __initdata; +static unsigned long byte_count __initdata; static __initdata loff_t this_header, next_header; static inline void __init eat(unsigned n) { victim += n; this_header += n; - count -= n; + byte_count -= n; } static __initdata char *vcollected; @@ -214,7 +214,7 @@ static __initdata char *collect; static void __init read_into(char *buf, unsigned size, enum state next) { - if (count >= size) { + if (byte_count >= size) { collected = victim; eat(size); state = next; @@ -237,8 +237,8 @@ static int __init do_start(void) static int __init do_collect(void) { unsigned long n = remains; - if (count < n) - n = count; + if (byte_count < n) + n = byte_count; memcpy(collect, victim, n); eat(n); collect += n; @@ -280,8 +280,8 @@ static int __init do_header(void) static int __init do_skip(void) { - if (this_header + count < next_header) { - eat(count); + if (this_header + byte_count < next_header) { + eat(byte_count); return 1; } else { eat(next_header - this_header); @@ -292,9 +292,9 @@ static int __init do_skip(void) static int __init do_reset(void) { - while(count && *victim == '\0') + while (byte_count && *victim == '\0') eat(1); - if (count && (this_header & 3)) + if (byte_count && (this_header & 3)) error("broken padding"); return 1; } @@ -309,11 +309,11 @@ static int __init maybe_link(void) return 0; } -static void __init clean_path(char *path, umode_t mode) +static void __init clean_path(char *path, umode_t fmode) { struct stat st; - if (!sys_newlstat(path, &st) && (st.st_mode^mode) & S_IFMT) { + if (!sys_newlstat(path, &st) && (st.st_mode ^ fmode) & S_IFMT) { if (S_ISDIR(st.st_mode)) sys_rmdir(path); else @@ -368,7 +368,7 @@ static int __init do_name(void) static int __init do_copy(void) { - if (count >= body_len) { + if (byte_count >= body_len) { if (xwrite(wfd, victim, body_len) != body_len) error("write error"); sys_close(wfd); @@ -378,10 +378,10 @@ static int __init do_copy(void) state = SkipIt; return 0; } else { - if (xwrite(wfd, victim, count) != count) + if (xwrite(wfd, victim, byte_count) != byte_count) error("write error"); - body_len -= count; - eat(count); + body_len -= byte_count; + eat(byte_count); return 1; } } @@ -411,12 +411,12 @@ static __initdata int (*actions[])(void) = { static long __init write_buffer(char *buf, unsigned long len) { - count = len; + byte_count = len; victim = buf; while (!actions[state]()) ; - return len - count; + return len - byte_count; } static long __init flush_buffer(void *bufv, unsigned long len) diff --git a/init/main.c b/init/main.c index 8af2f1abfe38..800a0daede7e 100644 --- a/init/main.c +++ b/init/main.c @@ -501,13 +501,13 @@ asmlinkage __visible void __init start_kernel(void) { char *command_line; char *after_dashes; - extern const struct kernel_param __start___param[], __stop___param[]; /* * Need to run as early as possible, to initialize the * lockdep hash: */ lockdep_init(); + set_task_stack_end_magic(&init_task); smp_setup_processor_id(); debug_objects_early_init(); @@ -583,6 +583,7 @@ asmlinkage __visible void __init start_kernel(void) early_irq_init(); init_IRQ(); tick_init(); + rcu_init_nohz(); init_timers(); hrtimers_init(); softirq_init(); @@ -842,7 +843,6 @@ static char *initcall_level_names[] __initdata = { static void __init do_initcall_level(int level) { - extern const struct kernel_param __start___param[], __stop___param[]; initcall_t *fn; strcpy(initcall_command_line, saved_command_line); |
