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authorDavid Woodhouse <dwmw2@shinybook.infradead.org>2005-08-09 16:51:35 +0100
committerDavid Woodhouse <dwmw2@shinybook.infradead.org>2005-08-09 16:51:35 +0100
commitc973b112c76c9d8fd042991128f218a738cc8d0a (patch)
treee813b0da5d0a0e19e06de6462d145a29ad683026 /kernel
parentc5fbc3966f48279dbebfde10248c977014aa9988 (diff)
parent00dd1e433967872f3997a45d5adf35056fdf2f56 (diff)
downloadop-kernel-dev-c973b112c76c9d8fd042991128f218a738cc8d0a.zip
op-kernel-dev-c973b112c76c9d8fd042991128f218a738cc8d0a.tar.gz
Merge with /shiny/git/linux-2.6/.git
Diffstat (limited to 'kernel')
-rw-r--r--kernel/capability.c20
-rw-r--r--kernel/cpuset.c26
-rw-r--r--kernel/crash_dump.c11
-rw-r--r--kernel/exit.c4
-rw-r--r--kernel/itimer.c37
-rw-r--r--kernel/module.c15
-rw-r--r--kernel/posix-timers.c18
-rw-r--r--kernel/power/smp.c2
-rw-r--r--kernel/sys.c4
-rw-r--r--kernel/sys_ni.c1
-rw-r--r--kernel/sysctl.c12
-rw-r--r--kernel/time.c2
12 files changed, 92 insertions, 60 deletions
diff --git a/kernel/capability.c b/kernel/capability.c
index 64db1ee..8986a37 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -31,8 +31,14 @@ static DEFINE_SPINLOCK(task_capability_lock);
* uninteresting and/or not to be changed.
*/
-/*
+/**
* sys_capget - get the capabilities of a given process.
+ * @header: pointer to struct that contains capability version and
+ * target pid data
+ * @dataptr: pointer to struct that contains the effective, permitted,
+ * and inheritable capabilities that are returned
+ *
+ * Returns 0 on success and < 0 on error.
*/
asmlinkage long sys_capget(cap_user_header_t header, cap_user_data_t dataptr)
{
@@ -141,8 +147,14 @@ static inline int cap_set_all(kernel_cap_t *effective,
return ret;
}
-/*
- * sys_capset - set capabilities for a given process, all processes, or all
+/**
+ * sys_capset - set capabilities for a process or a group of processes
+ * @header: pointer to struct that contains capability version and
+ * target pid data
+ * @data: pointer to struct that contains the effective, permitted,
+ * and inheritable capabilities
+ *
+ * Set capabilities for a given process, all processes, or all
* processes in a given process group.
*
* The restrictions on setting capabilities are specified as:
@@ -152,6 +164,8 @@ static inline int cap_set_all(kernel_cap_t *effective,
* I: any raised capabilities must be a subset of the (old current) permitted
* P: any raised capabilities must be a subset of the (old current) permitted
* E: must be set to a subset of (new target) permitted
+ *
+ * Returns 0 on success and < 0 on error.
*/
asmlinkage long sys_capset(cap_user_header_t header, const cap_user_data_t data)
{
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 984c0bf..805fb90 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1440,10 +1440,10 @@ void __init cpuset_init_smp(void)
/**
* cpuset_fork - attach newly forked task to its parents cpuset.
- * @p: pointer to task_struct of forking parent process.
+ * @tsk: pointer to task_struct of forking parent process.
*
* Description: By default, on fork, a task inherits its
- * parents cpuset. The pointer to the shared cpuset is
+ * parent's cpuset. The pointer to the shared cpuset is
* automatically copied in fork.c by dup_task_struct().
* This cpuset_fork() routine need only increment the usage
* counter in that cpuset.
@@ -1471,7 +1471,6 @@ void cpuset_fork(struct task_struct *tsk)
* by the cpuset_sem semaphore. If you don't hold cpuset_sem,
* then a zero cpuset use count is a license to any other task to
* nuke the cpuset immediately.
- *
**/
void cpuset_exit(struct task_struct *tsk)
@@ -1521,7 +1520,9 @@ void cpuset_init_current_mems_allowed(void)
current->mems_allowed = NODE_MASK_ALL;
}
-/*
+/**
+ * cpuset_update_current_mems_allowed - update mems parameters to new values
+ *
* If the current tasks cpusets mems_allowed changed behind our backs,
* update current->mems_allowed and mems_generation to the new value.
* Do not call this routine if in_interrupt().
@@ -1540,13 +1541,20 @@ void cpuset_update_current_mems_allowed(void)
}
}
+/**
+ * cpuset_restrict_to_mems_allowed - limit nodes to current mems_allowed
+ * @nodes: pointer to a node bitmap that is and-ed with mems_allowed
+ */
void cpuset_restrict_to_mems_allowed(unsigned long *nodes)
{
bitmap_and(nodes, nodes, nodes_addr(current->mems_allowed),
MAX_NUMNODES);
}
-/*
+/**
+ * cpuset_zonelist_valid_mems_allowed - check zonelist vs. curremt mems_allowed
+ * @zl: the zonelist to be checked
+ *
* Are any of the nodes on zonelist zl allowed in current->mems_allowed?
*/
int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
@@ -1562,8 +1570,12 @@ int cpuset_zonelist_valid_mems_allowed(struct zonelist *zl)
return 0;
}
-/*
- * Is 'current' valid, and is zone z allowed in current->mems_allowed?
+/**
+ * cpuset_zone_allowed - is zone z allowed in current->mems_allowed
+ * @z: zone in question
+ *
+ * Is zone z allowed in current->mems_allowed, or is
+ * the CPU in interrupt context? (zone is always allowed in this case)
*/
int cpuset_zone_allowed(struct zone *z)
{
diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c
index 459ba49..334c37f 100644
--- a/kernel/crash_dump.c
+++ b/kernel/crash_dump.c
@@ -18,7 +18,16 @@
/* Stores the physical address of elf header of crash image. */
unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
-/*
+/**
+ * copy_oldmem_page - copy one page from "oldmem"
+ * @pfn: page frame number to be copied
+ * @buf: target memory address for the copy; this can be in kernel address
+ * space or user address space (see @userbuf)
+ * @csize: number of bytes to copy
+ * @offset: offset in bytes into the page (based on pfn) to begin the copy
+ * @userbuf: if set, @buf is in user address space, use copy_to_user(),
+ * otherwise @buf is in kernel address space, use memcpy().
+ *
* Copy a page from "oldmem". For this page, there is no pte mapped
* in the current kernel. We stitch up a pte, similar to kmap_atomic.
*/
diff --git a/kernel/exit.c b/kernel/exit.c
index 9d1b10e..5b0fb9f 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -829,8 +829,10 @@ fastcall NORET_TYPE void do_exit(long code)
acct_update_integrals(tsk);
update_mem_hiwater(tsk);
group_dead = atomic_dec_and_test(&tsk->signal->live);
- if (group_dead)
+ if (group_dead) {
+ del_timer_sync(&tsk->signal->real_timer);
acct_process(code);
+ }
exit_mm(tsk);
exit_sem(tsk);
diff --git a/kernel/itimer.c b/kernel/itimer.c
index a72cb0e..7c1b25e 100644
--- a/kernel/itimer.c
+++ b/kernel/itimer.c
@@ -112,28 +112,11 @@ asmlinkage long sys_getitimer(int which, struct itimerval __user *value)
return error;
}
-/*
- * Called with P->sighand->siglock held and P->signal->real_timer inactive.
- * If interval is nonzero, arm the timer for interval ticks from now.
- */
-static inline void it_real_arm(struct task_struct *p, unsigned long interval)
-{
- p->signal->it_real_value = interval; /* XXX unnecessary field?? */
- if (interval == 0)
- return;
- if (interval > (unsigned long) LONG_MAX)
- interval = LONG_MAX;
- /* the "+ 1" below makes sure that the timer doesn't go off before
- * the interval requested. This could happen if
- * time requested % (usecs per jiffy) is more than the usecs left
- * in the current jiffy */
- p->signal->real_timer.expires = jiffies + interval + 1;
- add_timer(&p->signal->real_timer);
-}
void it_real_fn(unsigned long __data)
{
struct task_struct * p = (struct task_struct *) __data;
+ unsigned long inc = p->signal->it_real_incr;
send_group_sig_info(SIGALRM, SEND_SIG_PRIV, p);
@@ -141,14 +124,23 @@ void it_real_fn(unsigned long __data)
* Now restart the timer if necessary. We don't need any locking
* here because do_setitimer makes sure we have finished running
* before it touches anything.
+ * Note, we KNOW we are (or should be) at a jiffie edge here so
+ * we don't need the +1 stuff. Also, we want to use the prior
+ * expire value so as to not "slip" a jiffie if we are late.
+ * Deal with requesting a time prior to "now" here rather than
+ * in add_timer.
*/
- it_real_arm(p, p->signal->it_real_incr);
+ if (!inc)
+ return;
+ while (time_before_eq(p->signal->real_timer.expires, jiffies))
+ p->signal->real_timer.expires += inc;
+ add_timer(&p->signal->real_timer);
}
int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue)
{
struct task_struct *tsk = current;
- unsigned long val, interval;
+ unsigned long val, interval, expires;
cputime_t cval, cinterval, nval, ninterval;
switch (which) {
@@ -164,7 +156,10 @@ again:
}
tsk->signal->it_real_incr =
timeval_to_jiffies(&value->it_interval);
- it_real_arm(tsk, timeval_to_jiffies(&value->it_value));
+ expires = timeval_to_jiffies(&value->it_value);
+ if (expires)
+ mod_timer(&tsk->signal->real_timer,
+ jiffies + 1 + expires);
spin_unlock_irq(&tsk->sighand->siglock);
if (ovalue) {
jiffies_to_timeval(val, &ovalue->it_value);
diff --git a/kernel/module.c b/kernel/module.c
index 068e271..c32995f 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -250,13 +250,18 @@ static inline unsigned int block_size(int val)
/* Created by linker magic */
extern char __per_cpu_start[], __per_cpu_end[];
-static void *percpu_modalloc(unsigned long size, unsigned long align)
+static void *percpu_modalloc(unsigned long size, unsigned long align,
+ const char *name)
{
unsigned long extra;
unsigned int i;
void *ptr;
- BUG_ON(align > SMP_CACHE_BYTES);
+ if (align > SMP_CACHE_BYTES) {
+ printk(KERN_WARNING "%s: per-cpu alignment %li > %i\n",
+ name, align, SMP_CACHE_BYTES);
+ align = SMP_CACHE_BYTES;
+ }
ptr = __per_cpu_start;
for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
@@ -348,7 +353,8 @@ static int percpu_modinit(void)
}
__initcall(percpu_modinit);
#else /* ... !CONFIG_SMP */
-static inline void *percpu_modalloc(unsigned long size, unsigned long align)
+static inline void *percpu_modalloc(unsigned long size, unsigned long align,
+ const char *name)
{
return NULL;
}
@@ -1644,7 +1650,8 @@ static struct module *load_module(void __user *umod,
if (pcpuindex) {
/* We have a special allocation for this section. */
percpu = percpu_modalloc(sechdrs[pcpuindex].sh_size,
- sechdrs[pcpuindex].sh_addralign);
+ sechdrs[pcpuindex].sh_addralign,
+ mod->name);
if (!percpu) {
err = -ENOMEM;
goto free_mod;
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 5b7b473..38798a2 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -896,21 +896,10 @@ static int adjust_abs_time(struct k_clock *clock, struct timespec *tp,
jiffies_64_f = get_jiffies_64();
}
/*
- * Take away now to get delta
+ * Take away now to get delta and normalize
*/
- oc.tv_sec -= now.tv_sec;
- oc.tv_nsec -= now.tv_nsec;
- /*
- * Normalize...
- */
- while ((oc.tv_nsec - NSEC_PER_SEC) >= 0) {
- oc.tv_nsec -= NSEC_PER_SEC;
- oc.tv_sec++;
- }
- while ((oc.tv_nsec) < 0) {
- oc.tv_nsec += NSEC_PER_SEC;
- oc.tv_sec--;
- }
+ set_normalized_timespec(&oc, oc.tv_sec - now.tv_sec,
+ oc.tv_nsec - now.tv_nsec);
}else{
jiffies_64_f = get_jiffies_64();
}
@@ -1177,7 +1166,6 @@ void exit_itimers(struct signal_struct *sig)
tmr = list_entry(sig->posix_timers.next, struct k_itimer, list);
itimer_delete(tmr);
}
- del_timer_sync(&sig->real_timer);
}
/*
diff --git a/kernel/power/smp.c b/kernel/power/smp.c
index bbe2307..911fc62 100644
--- a/kernel/power/smp.c
+++ b/kernel/power/smp.c
@@ -38,7 +38,7 @@ void disable_nonboot_cpus(void)
}
printk("Error taking cpu %d down: %d\n", cpu, error);
}
- BUG_ON(smp_processor_id() != 0);
+ BUG_ON(raw_smp_processor_id() != 0);
if (error)
panic("cpus not sleeping");
}
diff --git a/kernel/sys.c b/kernel/sys.c
index a7403903..0bcaed6 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -371,7 +371,6 @@ void kernel_restart(char *cmd)
{
notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
system_state = SYSTEM_RESTART;
- device_suspend(PMSG_FREEZE);
device_shutdown();
if (!cmd) {
printk(KERN_EMERG "Restarting system.\n");
@@ -393,7 +392,6 @@ void kernel_kexec(void)
}
notifier_call_chain(&reboot_notifier_list, SYS_RESTART, NULL);
system_state = SYSTEM_RESTART;
- device_suspend(PMSG_FREEZE);
device_shutdown();
printk(KERN_EMERG "Starting new kernel\n");
machine_shutdown();
@@ -406,7 +404,6 @@ void kernel_halt(void)
{
notifier_call_chain(&reboot_notifier_list, SYS_HALT, NULL);
system_state = SYSTEM_HALT;
- device_suspend(PMSG_SUSPEND);
device_shutdown();
printk(KERN_EMERG "System halted.\n");
machine_halt();
@@ -417,7 +414,6 @@ void kernel_power_off(void)
{
notifier_call_chain(&reboot_notifier_list, SYS_POWER_OFF, NULL);
system_state = SYSTEM_POWER_OFF;
- device_suspend(PMSG_SUSPEND);
device_shutdown();
printk(KERN_EMERG "Power down.\n");
machine_power_off();
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index 42b40ae..1ab2370 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -79,7 +79,6 @@ cond_syscall(sys_request_key);
cond_syscall(sys_keyctl);
cond_syscall(compat_sys_keyctl);
cond_syscall(compat_sys_socketcall);
-cond_syscall(sys_set_zone_reclaim);
cond_syscall(sys_inotify_init);
cond_syscall(sys_inotify_add_watch);
cond_syscall(sys_inotify_rm_watch);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index e60b9c3..3e0bbee 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -114,6 +114,7 @@ extern int unaligned_enabled;
extern int sysctl_ieee_emulation_warnings;
#endif
extern int sysctl_userprocess_debug;
+extern int spin_retry;
#endif
extern int sysctl_hz_timer;
@@ -647,7 +648,16 @@ static ctl_table kern_table[] = {
.mode = 0644,
.proc_handler = &proc_dointvec,
},
-
+#if defined(CONFIG_ARCH_S390)
+ {
+ .ctl_name = KERN_SPIN_RETRY,
+ .procname = "spin_retry",
+ .data = &spin_retry,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
{ .ctl_name = 0 }
};
diff --git a/kernel/time.c b/kernel/time.c
index d4335c1..dd5ae11 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -128,7 +128,7 @@ asmlinkage long sys_gettimeofday(struct timeval __user *tv, struct timezone __us
* as real UNIX machines always do it. This avoids all headaches about
* daylight saving times and warping kernel clocks.
*/
-inline static void warp_clock(void)
+static inline void warp_clock(void)
{
write_seqlock_irq(&xtime_lock);
wall_to_monotonic.tv_sec -= sys_tz.tz_minuteswest * 60;
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