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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-01 20:48:54 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-01 20:48:54 -0700
commit1ed4395035a6791ebbbf618429a58ab9c207cc83 (patch)
treea34158c5dd3c4ca70f140da5a484ca6142a3b8c3
parent878701db07db3f0b59f14f0c525b681e4ca81551 (diff)
parentb718f91c14604e4ab5cdfe8d3baff8111425ea7d (diff)
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Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] ITC: Reduce rating for ITC clock if ITCs are drifty [IA64] SN2: Fix up sn2_rtc clock [IA64] Fix wrong access to irq_desc[] in iosapic_register_intr(). [IA64] Fix possible race in destroy_and_reserve_irq() [IA64] Fix registered interrupt check [IA64] Remove a few duplicate includes [IA64] Allow smp_call_function_single() to current cpu [IA64] fix a few section mismatch warnings
-rw-r--r--arch/ia64/ia32/sys_ia32.c1
-rw-r--r--arch/ia64/kernel/iosapic.c19
-rw-r--r--arch/ia64/kernel/irq_ia64.c17
-rw-r--r--arch/ia64/kernel/mca.c17
-rw-r--r--arch/ia64/kernel/setup.c1
-rw-r--r--arch/ia64/kernel/smp.c8
-rw-r--r--arch/ia64/kernel/time.c16
-rw-r--r--arch/ia64/sn/kernel/io_common.c2
-rw-r--r--arch/ia64/sn/kernel/setup.c1
-rw-r--r--arch/ia64/sn/kernel/sn2/timer.c7
10 files changed, 50 insertions, 39 deletions
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index af10462d44d..a3405b3c1ee 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -34,7 +34,6 @@
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/quota.h>
-#include <linux/syscalls.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 91e6dc1e7ba..cfe4654838f 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -142,7 +142,7 @@ struct iosapic_rte_info {
static struct iosapic_intr_info {
struct list_head rtes; /* RTEs using this vector (empty =>
* not an IOSAPIC interrupt) */
- int count; /* # of RTEs that shares this vector */
+ int count; /* # of registered RTEs */
u32 low32; /* current value of low word of
* Redirection table entry */
unsigned int dest; /* destination CPU physical ID */
@@ -313,7 +313,7 @@ mask_irq (unsigned int irq)
int rte_index;
struct iosapic_rte_info *rte;
- if (list_empty(&iosapic_intr_info[irq].rtes))
+ if (!iosapic_intr_info[irq].count)
return; /* not an IOSAPIC interrupt! */
/* set only the mask bit */
@@ -331,7 +331,7 @@ unmask_irq (unsigned int irq)
int rte_index;
struct iosapic_rte_info *rte;
- if (list_empty(&iosapic_intr_info[irq].rtes))
+ if (!iosapic_intr_info[irq].count)
return; /* not an IOSAPIC interrupt! */
low32 = iosapic_intr_info[irq].low32 &= ~IOSAPIC_MASK;
@@ -363,7 +363,7 @@ iosapic_set_affinity (unsigned int irq, cpumask_t mask)
dest = cpu_physical_id(first_cpu(mask));
- if (list_empty(&iosapic_intr_info[irq].rtes))
+ if (!iosapic_intr_info[irq].count)
return; /* not an IOSAPIC interrupt */
set_irq_affinity_info(irq, dest, redir);
@@ -542,7 +542,7 @@ iosapic_reassign_vector (int irq)
{
int new_irq;
- if (!list_empty(&iosapic_intr_info[irq].rtes)) {
+ if (iosapic_intr_info[irq].count) {
new_irq = create_irq();
if (new_irq < 0)
panic("%s: out of interrupt vectors!\n", __FUNCTION__);
@@ -560,7 +560,7 @@ iosapic_reassign_vector (int irq)
}
}
-static struct iosapic_rte_info *iosapic_alloc_rte (void)
+static struct iosapic_rte_info * __init_refok iosapic_alloc_rte (void)
{
int i;
struct iosapic_rte_info *rte;
@@ -677,7 +677,7 @@ get_target_cpu (unsigned int gsi, int irq)
* In case of vector shared by multiple RTEs, all RTEs that
* share the vector need to use the same destination CPU.
*/
- if (!list_empty(&iosapic_intr_info[irq].rtes))
+ if (iosapic_intr_info[irq].count)
return iosapic_intr_info[irq].dest;
/*
@@ -794,8 +794,9 @@ iosapic_register_intr (unsigned int gsi,
err = register_intr(gsi, irq, IOSAPIC_LOWEST_PRIORITY,
polarity, trigger);
if (err < 0) {
+ spin_unlock(&irq_desc[irq].lock);
irq = err;
- goto unlock_all;
+ goto unlock_iosapic_lock;
}
/*
@@ -811,7 +812,7 @@ iosapic_register_intr (unsigned int gsi,
gsi, (trigger == IOSAPIC_EDGE ? "edge" : "level"),
(polarity == IOSAPIC_POL_HIGH ? "high" : "low"),
cpu_logical_id(dest), dest, irq_to_vector(irq));
- unlock_all:
+
spin_unlock(&irq_desc[irq].lock);
unlock_iosapic_lock:
spin_unlock_irqrestore(&iosapic_lock, flags);
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 9386b955eed..c47c8acc96e 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -101,15 +101,6 @@ int check_irq_used(int irq)
return -1;
}
-static void reserve_irq(unsigned int irq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&vector_lock, flags);
- irq_status[irq] = IRQ_RSVD;
- spin_unlock_irqrestore(&vector_lock, flags);
-}
-
static inline int find_unassigned_irq(void)
{
int irq;
@@ -302,10 +293,14 @@ static cpumask_t vector_allocation_domain(int cpu)
void destroy_and_reserve_irq(unsigned int irq)
{
+ unsigned long flags;
+
dynamic_irq_cleanup(irq);
- clear_irq_vector(irq);
- reserve_irq(irq);
+ spin_lock_irqsave(&vector_lock, flags);
+ __clear_irq_vector(irq);
+ irq_status[irq] = IRQ_RSVD;
+ spin_unlock_irqrestore(&vector_lock, flags);
}
static int __reassign_irq_vector(int irq, int cpu)
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 4b5daa3cc0f..ff28620cb99 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1750,8 +1750,17 @@ format_mca_init_stack(void *mca_data, unsigned long offset,
strncpy(p->comm, type, sizeof(p->comm)-1);
}
-/* Do per-CPU MCA-related initialization. */
+/* Caller prevents this from being called after init */
+static void * __init_refok mca_bootmem(void)
+{
+ void *p;
+ p = alloc_bootmem(sizeof(struct ia64_mca_cpu) * NR_CPUS +
+ KERNEL_STACK_SIZE);
+ return (void *)ALIGN((unsigned long)p, KERNEL_STACK_SIZE);
+}
+
+/* Do per-CPU MCA-related initialization. */
void __cpuinit
ia64_mca_cpu_init(void *cpu_data)
{
@@ -1763,11 +1772,7 @@ ia64_mca_cpu_init(void *cpu_data)
int cpu;
first_time = 0;
- mca_data = alloc_bootmem(sizeof(struct ia64_mca_cpu)
- * NR_CPUS + KERNEL_STACK_SIZE);
- mca_data = (void *)(((unsigned long)mca_data +
- KERNEL_STACK_SIZE - 1) &
- (-KERNEL_STACK_SIZE));
+ mca_data = mca_bootmem();
for (cpu = 0; cpu < NR_CPUS; cpu++) {
format_mca_init_stack(mca_data,
offsetof(struct ia64_mca_cpu, mca_stack),
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 7cecd296420..cd9a37a552c 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -60,7 +60,6 @@
#include <asm/smp.h>
#include <asm/system.h>
#include <asm/unistd.h>
-#include <asm/system.h>
#if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE)
# error "struct cpuinfo_ia64 too big!"
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 0982882bfb8..4e446aa5f4a 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -346,7 +346,7 @@ smp_flush_tlb_mm (struct mm_struct *mm)
}
/*
- * Run a function on another CPU
+ * Run a function on a specific CPU
* <func> The function to run. This must be fast and non-blocking.
* <info> An arbitrary pointer to pass to the function.
* <nonatomic> Currently unused.
@@ -366,9 +366,11 @@ smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int
int me = get_cpu(); /* prevent preemption and reschedule on another processor */
if (cpuid == me) {
- printk(KERN_INFO "%s: trying to call self\n", __FUNCTION__);
+ local_irq_disable();
+ func(info);
+ local_irq_enable();
put_cpu();
- return -EBUSY;
+ return 0;
}
data.func = func;
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 6c0e9e2e1b8..98cfc90cab1 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -240,7 +240,21 @@ ia64_init_itm (void)
if (!nojitter)
itc_jitter_data.itc_jitter = 1;
#endif
- }
+ } else
+ /*
+ * ITC is drifty and we have not synchronized the ITCs in smpboot.c.
+ * ITC values may fluctuate significantly between processors.
+ * Clock should not be used for hrtimers. Mark itc as only
+ * useful for boot and testing.
+ *
+ * Note that jitter compensation is off! There is no point of
+ * synchronizing ITCs since they may be large differentials
+ * that change over time.
+ *
+ * The only way to fix this would be to repeatedly sync the
+ * ITCs. Until that time we have to avoid ITC.
+ */
+ clocksource_itc.rating = 50;
/* Setup the CPU local timer tick */
ia64_cpu_local_tick();
diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c
index 787ed642dd4..4594770e685 100644
--- a/arch/ia64/sn/kernel/io_common.c
+++ b/arch/ia64/sn/kernel/io_common.c
@@ -391,7 +391,7 @@ void sn_bus_free_sysdata(void)
* hubdev_init_node() - Creates the HUB data structure and link them to it's
* own NODE specific data area.
*/
-void hubdev_init_node(nodepda_t * npda, cnodeid_t node)
+void __init hubdev_init_node(nodepda_t * npda, cnodeid_t node)
{
struct hubdev_info *hubdev_info;
int size;
diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 684b1c984a4..1f38a3a6839 100644
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -25,7 +25,6 @@
#include <linux/interrupt.h>
#include <linux/acpi.h>
#include <linux/compiler.h>
-#include <linux/sched.h>
#include <linux/root_dev.h>
#include <linux/nodemask.h>
#include <linux/pm.h>
diff --git a/arch/ia64/sn/kernel/sn2/timer.c b/arch/ia64/sn/kernel/sn2/timer.c
index 19e25d2b64f..cf67fc56205 100644
--- a/arch/ia64/sn/kernel/sn2/timer.c
+++ b/arch/ia64/sn/kernel/sn2/timer.c
@@ -23,16 +23,14 @@
extern unsigned long sn_rtc_cycles_per_second;
-static void __iomem *sn2_mc;
-
static cycle_t read_sn2(void)
{
- return (cycle_t)readq(sn2_mc);
+ return (cycle_t)readq(RTC_COUNTER_ADDR);
}
static struct clocksource clocksource_sn2 = {
.name = "sn2_rtc",
- .rating = 300,
+ .rating = 450,
.read = read_sn2,
.mask = (1LL << 55) - 1,
.mult = 0,
@@ -58,7 +56,6 @@ ia64_sn_udelay (unsigned long usecs)
void __init sn_timer_init(void)
{
- sn2_mc = RTC_COUNTER_ADDR;
clocksource_sn2.fsys_mmio = RTC_COUNTER_ADDR;
clocksource_sn2.mult = clocksource_hz2mult(sn_rtc_cycles_per_second,
clocksource_sn2.shift);