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-rw-r--r--arch/ia64/configs/sn2_defconfig2
-rw-r--r--arch/ia64/kernel/time.c29
-rw-r--r--arch/ia64/kernel/uncached.c6
-rw-r--r--arch/ia64/kernel/vmlinux.lds.S3
-rw-r--r--arch/ia64/sn/kernel/sn2/sn2_smp.c2
5 files changed, 37 insertions, 5 deletions
diff --git a/arch/ia64/configs/sn2_defconfig b/arch/ia64/configs/sn2_defconfig
index e1924cc9687..ff8bb3770c9 100644
--- a/arch/ia64/configs/sn2_defconfig
+++ b/arch/ia64/configs/sn2_defconfig
@@ -113,7 +113,7 @@ CONFIG_IOSAPIC=y
CONFIG_IA64_SGI_SN_XP=m
CONFIG_FORCE_MAX_ZONEORDER=17
CONFIG_SMP=y
-CONFIG_NR_CPUS=512
+CONFIG_NR_CPUS=1024
# CONFIG_HOTPLUG_CPU is not set
CONFIG_SCHED_SMT=y
CONFIG_PREEMPT=y
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 5b7e736f3b4..028a2b95936 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -249,3 +249,32 @@ time_init (void)
*/
set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec);
}
+
+#define SMALLUSECS 100
+
+void
+udelay (unsigned long usecs)
+{
+ unsigned long start;
+ unsigned long cycles;
+ unsigned long smallusecs;
+
+ /*
+ * Execute the non-preemptible delay loop (because the ITC might
+ * not be synchronized between CPUS) in relatively short time
+ * chunks, allowing preemption between the chunks.
+ */
+ while (usecs > 0) {
+ smallusecs = (usecs > SMALLUSECS) ? SMALLUSECS : usecs;
+ preempt_disable();
+ cycles = smallusecs*local_cpu_data->cyc_per_usec;
+ start = ia64_get_itc();
+
+ while (ia64_get_itc() - start < cycles)
+ cpu_relax();
+
+ preempt_enable();
+ usecs -= smallusecs;
+ }
+}
+EXPORT_SYMBOL(udelay);
diff --git a/arch/ia64/kernel/uncached.c b/arch/ia64/kernel/uncached.c
index c6d40446c2c..b631cf86ed4 100644
--- a/arch/ia64/kernel/uncached.c
+++ b/arch/ia64/kernel/uncached.c
@@ -53,7 +53,7 @@ static void uncached_ipi_visibility(void *data)
if ((status != PAL_VISIBILITY_OK) &&
(status != PAL_VISIBILITY_OK_REMOTE_NEEDED))
printk(KERN_DEBUG "pal_prefetch_visibility() returns %i on "
- "CPU %i\n", status, get_cpu());
+ "CPU %i\n", status, raw_smp_processor_id());
}
@@ -63,7 +63,7 @@ static void uncached_ipi_mc_drain(void *data)
status = ia64_pal_mc_drain();
if (status)
printk(KERN_WARNING "ia64_pal_mc_drain() failed with %i on "
- "CPU %i\n", status, get_cpu());
+ "CPU %i\n", status, raw_smp_processor_id());
}
@@ -105,7 +105,7 @@ uncached_get_new_chunk(struct gen_pool *poolp)
status = ia64_pal_prefetch_visibility(PAL_VISIBILITY_PHYSICAL);
dprintk(KERN_INFO "pal_prefetch_visibility() returns %i on cpu %i\n",
- status, get_cpu());
+ status, raw_smp_processor_id());
if (!status) {
status = smp_call_function(uncached_ipi_visibility, NULL, 0, 1);
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 30d8564e960..73af6267d2e 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -177,6 +177,9 @@ SECTIONS
}
. = ALIGN(PAGE_SIZE); /* make sure the gate page doesn't expose kernel data */
+ .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET)
+ { *(.data.read_mostly) }
+
.data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET)
{ *(.data.cacheline_aligned) }
diff --git a/arch/ia64/sn/kernel/sn2/sn2_smp.c b/arch/ia64/sn/kernel/sn2/sn2_smp.c
index 5d54f5f4e92..471bbaa65d1 100644
--- a/arch/ia64/sn/kernel/sn2/sn2_smp.c
+++ b/arch/ia64/sn/kernel/sn2/sn2_smp.c
@@ -202,7 +202,7 @@ sn2_global_tlb_purge(struct mm_struct *mm, unsigned long start,
unsigned long end, unsigned long nbits)
{
int i, opt, shub1, cnode, mynasid, cpu, lcpu = 0, nasid, flushed = 0;
- int mymm = (mm == current->active_mm);
+ int mymm = (mm == current->active_mm && current->mm);
volatile unsigned long *ptc0, *ptc1;
unsigned long itc, itc2, flags, data0 = 0, data1 = 0, rr_value;
short nasids[MAX_NUMNODES], nix;