4 files changed, 32 insertions, 10 deletions

diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c
index 318787c84ac0..28a4529fdd60 100644
--- a/arch/ia64/kernel/acpi.c
+++ b/arch/ia64/kernel/acpi.c
@@ -583,14 +583,12 @@ int acpi_register_gsi(u32 gsi, int edge_level, int active_high_low)
 
 EXPORT_SYMBOL(acpi_register_gsi);
 
-#ifdef CONFIG_ACPI_DEALLOCATE_IRQ
 void acpi_unregister_gsi(u32 gsi)
 {
         iosapic_unregister_intr(gsi);
 }
 
 EXPORT_SYMBOL(acpi_unregister_gsi);
-#endif                          /* CONFIG_ACPI_DEALLOCATE_IRQ */
 
 static int __init acpi_parse_fadt(unsigned long phys_addr, unsigned long size)
 {
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 6d70fec82d0e..ba0b6a1f429f 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -204,9 +204,6 @@ GLOBAL_ENTRY(ia64_switch_to)
 (p6)    br.cond.dpnt .map
         ;;
 .done:
-(p6)    ssm psr.ic                      // if we had to map, reenable the psr.ic bit FIRST!!!
-        ;;
-(p6)    srlz.d
         ld8 sp=[r21]                    // load kernel stack pointer of new task
         mov IA64_KR(CURRENT)=in0        // update "current" application register
         mov r8=r13                      // return pointer to previously running task
@@ -234,6 +231,9 @@ GLOBAL_ENTRY(ia64_switch_to)
         mov IA64_KR(CURRENT_STACK)=r26  // remember last page we mapped...
         ;;
         itr.d dtr[r25]=r23              // wire in new mapping...
+        ssm psr.ic                      // reenable the psr.ic bit
+        ;;
+        srlz.d
         br.cond.sptk .done
 END(ia64_switch_to)
 
@@ -470,6 +470,29 @@ ENTRY(load_switch_stack)
         br.cond.sptk.many b7
 END(load_switch_stack)
 
+GLOBAL_ENTRY(prefetch_stack)
+        add r14 = -IA64_SWITCH_STACK_SIZE, sp
+        add r15 = IA64_TASK_THREAD_KSP_OFFSET, in0
+        ;;
+        ld8 r16 = [r15]                         // load next's stack pointer
+        lfetch.fault.excl [r14], 128
+        ;;
+        lfetch.fault.excl [r14], 128
+        lfetch.fault [r16], 128
+        ;;
+        lfetch.fault.excl [r14], 128
+        lfetch.fault [r16], 128
+        ;;
+        lfetch.fault.excl [r14], 128
+        lfetch.fault [r16], 128
+        ;;
+        lfetch.fault.excl [r14], 128
+        lfetch.fault [r16], 128
+        ;;
+        lfetch.fault [r16], 128
+        br.ret.sptk.many rp
+END(prefetch_switch_stack)
+
 GLOBAL_ENTRY(execve)
         mov r15=__NR_execve                     // put syscall number in place
         break __BREAK_SYSCALL
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index a13df592ebf7..574084f343fa 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -782,7 +782,6 @@ again:
         return vector;
 }
 
-#ifdef CONFIG_ACPI_DEALLOCATE_IRQ
 void
 iosapic_unregister_intr (unsigned int gsi)
 {
@@ -865,7 +864,6 @@ iosapic_unregister_intr (unsigned int gsi)
         spin_unlock(&iosapic_lock);
         spin_unlock_irqrestore(&idesc->lock, flags);
 }
-#endif /* CONFIG_ACPI_DEALLOCATE_IRQ */
 
 /*
  * ACPI calls this when it finds an entry for a platform interrupt.
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index f1201ac8a116..1650353e3f77 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -38,6 +38,7 @@
 #include <linux/pagemap.h>
 #include <linux/mount.h>
 #include <linux/bitops.h>
+#include <linux/rcupdate.h>
 
 #include <asm/errno.h>
 #include <asm/intrinsics.h>
@@ -496,7 +497,7 @@ typedef struct {
 static pfm_stats_t              pfm_stats[NR_CPUS];
 static pfm_session_t            pfm_sessions;   /* global sessions information */
 
-static spinlock_t pfm_alt_install_check = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(pfm_alt_install_check);
 static pfm_intr_handler_desc_t  *pfm_alt_intr_handler;
 
 static struct proc_dir_entry    *perfmon_dir;
@@ -2217,15 +2218,17 @@ static void
 pfm_free_fd(int fd, struct file *file)
 {
         struct files_struct *files = current->files;
+        struct fdtable *fdt = files_fdtable(files);
 
         /* 
          * there ie no fd_uninstall(), so we do it here
          */
         spin_lock(&files->file_lock);
-        files->fd[fd] = NULL;
+        rcu_assign_pointer(fdt->fd[fd], NULL);
         spin_unlock(&files->file_lock);
 
-        if (file) put_filp(file);
+        if (file)
+                put_filp(file);
         put_unused_fd(fd);
 }