diff options
author | Ingo Molnar <mingo@elte.hu> | 2011-08-04 09:09:27 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2011-08-04 09:09:27 +0200 |
commit | d7619fe39d9769b4d4545cc511c891deea18ae08 (patch) | |
tree | 0a902533414001075b2245825e145cc2e35ce985 /kernel | |
parent | 9ea71503a8ed9184d2d0b8ccc4d269d05f7940ae (diff) | |
parent | ed8f37370d83e695c0a4fa5d5fc7a83ecb947526 (diff) |
Merge branch 'linus' into core/urgent
Diffstat (limited to 'kernel')
83 files changed, 3247 insertions, 1906 deletions
diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt index bf987b95b356..24e7cb0ba26a 100644 --- a/kernel/Kconfig.preempt +++ b/kernel/Kconfig.preempt @@ -35,6 +35,7 @@ config PREEMPT_VOLUNTARY config PREEMPT bool "Preemptible Kernel (Low-Latency Desktop)" + select PREEMPT_COUNT help This option reduces the latency of the kernel by making all kernel code (that is not executing in a critical section) @@ -52,3 +53,5 @@ config PREEMPT endchoice +config PREEMPT_COUNT + bool
\ No newline at end of file diff --git a/kernel/Makefile b/kernel/Makefile index 2d64cfcc8b42..d06467fc8f7c 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -125,11 +125,10 @@ targets += config_data.gz $(obj)/config_data.gz: $(KCONFIG_CONFIG) FORCE $(call if_changed,gzip) -quiet_cmd_ikconfiggz = IKCFG $@ - cmd_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") > $@ + filechk_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") targets += config_data.h $(obj)/config_data.h: $(obj)/config_data.gz FORCE - $(call if_changed,ikconfiggz) + $(call filechk,ikconfiggz) $(obj)/time.o: $(obj)/timeconst.h diff --git a/kernel/async.c b/kernel/async.c index cd9dbb913c77..d5fe7af0de2e 100644 --- a/kernel/async.c +++ b/kernel/async.c @@ -49,12 +49,13 @@ asynchronous and synchronous parts of the kernel. */ #include <linux/async.h> +#include <linux/atomic.h> +#include <linux/ktime.h> #include <linux/module.h> #include <linux/wait.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/workqueue.h> -#include <asm/atomic.h> static async_cookie_t next_cookie = 1; @@ -128,7 +129,8 @@ static void async_run_entry_fn(struct work_struct *work) /* 2) run (and print duration) */ if (initcall_debug && system_state == SYSTEM_BOOTING) { - printk("calling %lli_%pF @ %i\n", (long long)entry->cookie, + printk(KERN_DEBUG "calling %lli_%pF @ %i\n", + (long long)entry->cookie, entry->func, task_pid_nr(current)); calltime = ktime_get(); } @@ -136,7 +138,7 @@ static void async_run_entry_fn(struct work_struct *work) if (initcall_debug && system_state == SYSTEM_BOOTING) { rettime = ktime_get(); delta = ktime_sub(rettime, calltime); - printk("initcall %lli_%pF returned 0 after %lld usecs\n", + printk(KERN_DEBUG "initcall %lli_%pF returned 0 after %lld usecs\n", (long long)entry->cookie, entry->func, (long long)ktime_to_ns(delta) >> 10); @@ -270,7 +272,7 @@ void async_synchronize_cookie_domain(async_cookie_t cookie, ktime_t starttime, delta, endtime; if (initcall_debug && system_state == SYSTEM_BOOTING) { - printk("async_waiting @ %i\n", task_pid_nr(current)); + printk(KERN_DEBUG "async_waiting @ %i\n", task_pid_nr(current)); starttime = ktime_get(); } @@ -280,7 +282,7 @@ void async_synchronize_cookie_domain(async_cookie_t cookie, endtime = ktime_get(); delta = ktime_sub(endtime, starttime); - printk("async_continuing @ %i after %lli usec\n", + printk(KERN_DEBUG "async_continuing @ %i after %lli usec\n", task_pid_nr(current), (long long)ktime_to_ns(delta) >> 10); } diff --git a/kernel/audit.c b/kernel/audit.c index 939500317066..0a1355ca3d79 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -43,7 +43,7 @@ #include <linux/init.h> #include <asm/types.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <linux/mm.h> #include <linux/module.h> #include <linux/slab.h> @@ -55,6 +55,9 @@ #include <net/sock.h> #include <net/netlink.h> #include <linux/skbuff.h> +#ifdef CONFIG_SECURITY +#include <linux/security.h> +#endif #include <linux/netlink.h> #include <linux/freezer.h> #include <linux/tty.h> @@ -1502,6 +1505,32 @@ void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type, } } +#ifdef CONFIG_SECURITY +/** + * audit_log_secctx - Converts and logs SELinux context + * @ab: audit_buffer + * @secid: security number + * + * This is a helper function that calls security_secid_to_secctx to convert + * secid to secctx and then adds the (converted) SELinux context to the audit + * log by calling audit_log_format, thus also preventing leak of internal secid + * to userspace. If secid cannot be converted audit_panic is called. + */ +void audit_log_secctx(struct audit_buffer *ab, u32 secid) +{ + u32 len; + char *secctx; + + if (security_secid_to_secctx(secid, &secctx, &len)) { + audit_panic("Cannot convert secid to context"); + } else { + audit_log_format(ab, " obj=%s", secctx); + security_release_secctx(secctx, len); + } +} +EXPORT_SYMBOL(audit_log_secctx); +#endif + EXPORT_SYMBOL(audit_log_start); EXPORT_SYMBOL(audit_log_end); EXPORT_SYMBOL(audit_log_format); diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c index e99dda04b126..5bf0790497e7 100644 --- a/kernel/audit_tree.c +++ b/kernel/audit_tree.c @@ -93,16 +93,10 @@ static inline void get_tree(struct audit_tree *tree) atomic_inc(&tree->count); } -static void __put_tree(struct rcu_head *rcu) -{ - struct audit_tree *tree = container_of(rcu, struct audit_tree, head); - kfree(tree); -} - static inline void put_tree(struct audit_tree *tree) { if (atomic_dec_and_test(&tree->count)) - call_rcu(&tree->head, __put_tree); + kfree_rcu(tree, head); } /* to avoid bringing the entire thing in audit.h */ diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 00d79df03e76..ce4b054acee5 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -44,7 +44,7 @@ #include <linux/init.h> #include <asm/types.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <linux/fs.h> #include <linux/namei.h> #include <linux/mm.h> diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 2731d115d725..1d2b6ceea95d 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -27,9 +27,11 @@ */ #include <linux/cgroup.h> +#include <linux/cred.h> #include <linux/ctype.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/init_task.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/mm.h> @@ -59,7 +61,7 @@ #include <linux/poll.h> #include <linux/flex_array.h> /* used in cgroup_attach_proc */ -#include <asm/atomic.h> +#include <linux/atomic.h> static DEFINE_MUTEX(cgroup_mutex); @@ -1514,6 +1516,7 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type, struct cgroup *root_cgrp = &root->top_cgroup; struct inode *inode; struct cgroupfs_root *existing_root; + const struct cred *cred; int i; BUG_ON(sb->s_root != NULL); @@ -1593,7 +1596,9 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type, BUG_ON(!list_empty(&root_cgrp->children)); BUG_ON(root->number_of_cgroups != 1); + cred = override_creds(&init_cred); cgroup_populate_dir(root_cgrp); + revert_creds(cred); mutex_unlock(&cgroup_mutex); mutex_unlock(&inode->i_mutex); } else { @@ -1697,7 +1702,6 @@ int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen) { char *start; struct dentry *dentry = rcu_dereference_check(cgrp->dentry, - rcu_read_lock_held() || cgroup_lock_is_held()); if (!dentry || cgrp == dummytop) { @@ -1723,7 +1727,6 @@ int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen) break; dentry = rcu_dereference_check(cgrp->dentry, - rcu_read_lock_held() || cgroup_lock_is_held()); if (!cgrp->parent) continue; @@ -3542,7 +3545,8 @@ static int cgroup_write_event_control(struct cgroup *cgrp, struct cftype *cft, } /* the process need read permission on control file */ - ret = file_permission(cfile, MAY_READ); + /* AV: shouldn't we check that it's been opened for read instead? */ + ret = inode_permission(cfile->f_path.dentry->d_inode, MAY_READ); if (ret < 0) goto fail; @@ -4813,8 +4817,7 @@ unsigned short css_id(struct cgroup_subsys_state *css) * on this or this is under rcu_read_lock(). Once css->id is allocated, * it's unchanged until freed. */ - cssid = rcu_dereference_check(css->id, - rcu_read_lock_held() || atomic_read(&css->refcnt)); + cssid = rcu_dereference_check(css->id, atomic_read(&css->refcnt)); if (cssid) return cssid->id; @@ -4826,8 +4829,7 @@ unsigned short css_depth(struct cgroup_subsys_state *css) { struct css_id *cssid; - cssid = rcu_dereference_check(css->id, - rcu_read_lock_held() || atomic_read(&css->refcnt)); + cssid = rcu_dereference_check(css->id, atomic_read(&css->refcnt)); if (cssid) return cssid->depth; diff --git a/kernel/compat.c b/kernel/compat.c index fc9eb093acd5..e2435ee9993a 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -158,6 +158,7 @@ int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user __put_user(ts->tv_sec, &cts->tv_sec) || __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; } +EXPORT_SYMBOL_GPL(put_compat_timespec); static long compat_nanosleep_restart(struct restart_block *restart) { @@ -890,6 +891,7 @@ sigset_from_compat (sigset_t *set, compat_sigset_t *compat) case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); } } +EXPORT_SYMBOL_GPL(sigset_from_compat); asmlinkage long compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, @@ -991,11 +993,8 @@ asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat sigset_from_compat(&newset, &newset32); sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); - spin_lock_irq(¤t->sighand->siglock); current->saved_sigmask = current->blocked; - current->blocked = newset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&newset); current->state = TASK_INTERRUPTIBLE; schedule(); diff --git a/kernel/configs.c b/kernel/configs.c index b4066b44a99d..42e8fa075eed 100644 --- a/kernel/configs.c +++ b/kernel/configs.c @@ -92,8 +92,8 @@ static void __exit ikconfig_cleanup(void) module_init(ikconfig_init); module_exit(ikconfig_cleanup); +#endif /* CONFIG_IKCONFIG_PROC */ + MODULE_LICENSE("GPL"); MODULE_AUTHOR("Randy Dunlap"); MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel"); - -#endif /* CONFIG_IKCONFIG_PROC */ diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 9c9b7545c810..10131fdaff70 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -55,7 +55,7 @@ #include <linux/sort.h> #include <asm/uaccess.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <linux/mutex.h> #include <linux/workqueue.h> #include <linux/cgroup.h> @@ -2460,11 +2460,19 @@ static int cpuset_spread_node(int *rotor) int cpuset_mem_spread_node(void) { + if (current->cpuset_mem_spread_rotor == NUMA_NO_NODE) + current->cpuset_mem_spread_rotor = + node_random(¤t->mems_allowed); + return cpuset_spread_node(¤t->cpuset_mem_spread_rotor); } int cpuset_slab_spread_node(void) { + if (current->cpuset_slab_spread_rotor == NUMA_NO_NODE) + current->cpuset_slab_spread_rotor = + node_random(¤t->mems_allowed); + return cpuset_spread_node(¤t->cpuset_slab_spread_rotor); } diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index bad6786dee88..0d7c08784efb 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -51,7 +51,7 @@ #include <asm/cacheflush.h> #include <asm/byteorder.h> -#include <asm/atomic.h> +#include <linux/atomic.h> #include <asm/system.h> #include "debug_core.h" diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c index a11db956dd62..34872482315e 100644 --- a/kernel/debug/gdbstub.c +++ b/kernel/debug/gdbstub.c @@ -42,6 +42,8 @@ /* Our I/O buffers. */ static char remcom_in_buffer[BUFMAX]; static char remcom_out_buffer[BUFMAX]; +static int gdbstub_use_prev_in_buf; +static int gdbstub_prev_in_buf_pos; /* Storage for the registers, in GDB format. */ static unsigned long gdb_regs[(NUMREGBYTES + @@ -58,6 +60,13 @@ static int gdbstub_read_wait(void) int ret = -1; int i; + if (unlikely(gdbstub_use_prev_in_buf)) { + if (gdbstub_prev_in_buf_pos < gdbstub_use_prev_in_buf) + return remcom_in_buffer[gdbstub_prev_in_buf_pos++]; + else + gdbstub_use_prev_in_buf = 0; + } + /* poll any additional I/O interfaces that are defined */ while (ret < 0) for (i = 0; kdb_poll_funcs[i] != NULL; i++) { @@ -109,7 +118,6 @@ static void get_packet(char *buffer) buffer[count] = ch; count = count + 1; } - buffer[count] = 0; if (ch == '#') { xmitcsum = hex_to_bin(gdbstub_read_wait()) << 4; @@ -124,6 +132,7 @@ static void get_packet(char *buffer) if (dbg_io_ops->flush) dbg_io_ops->flush(); } + buffer[count] = 0; } while (checksum != xmitcsum); } @@ -1082,12 +1091,11 @@ int gdbstub_state(struct kgdb_state *ks, char *cmd) case 'c': strcpy(remcom_in_buffer, cmd); return 0; - case '?': - gdb_cmd_status(ks); - break; - case '\0': - strcpy(remcom_out_buffer, ""); - break; + case '$': + strcpy(remcom_in_buffer, cmd); + gdbstub_use_prev_in_buf = strlen(remcom_in_buffer); + gdbstub_prev_in_buf_pos = 0; + return 0; } dbg_io_ops->write_char('+'); put_packet(remcom_out_buffer); diff --git a/kernel/debug/kdb/kdb_bt.c b/kernel/debug/kdb/kdb_bt.c index 2f62fe85f16a..7179eac7b41c 100644 --- a/kernel/debug/kdb/kdb_bt.c +++ b/kernel/debug/kdb/kdb_bt.c @@ -112,9 +112,8 @@ kdb_bt(int argc, const char **argv) unsigned long addr; long offset; - kdbgetintenv("BTARGS", &argcount); /* Arguments to print */ - kdbgetintenv("BTAPROMPT", &btaprompt); /* Prompt after each - * proc in bta */ + /* Prompt after each proc in bta */ + kdbgetintenv("BTAPROMPT", &btaprompt); if (strcmp(argv[0], "bta") == 0) { struct task_struct *g, *p; diff --git a/kernel/debug/kdb/kdb_cmds b/kernel/debug/kdb/kdb_cmds index 56c88e4db309..9834ad303ab6 100644 --- a/kernel/debug/kdb/kdb_cmds +++ b/kernel/debug/kdb/kdb_cmds @@ -18,16 +18,12 @@ defcmd dumpcommon "" "Common kdb debug |