1 files changed, 4 insertions, 14 deletions

diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 9d0fd7d5bb8..f00ba025375 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -604,12 +604,6 @@ pfm_unprotect_ctx_ctxsw(pfm_context_t *x, unsigned long f)
         spin_unlock(&(x)->ctx_lock);
 }
 
-static inline unsigned int
-pfm_do_munmap(struct mm_struct *mm, unsigned long addr, size_t len, int acct)
-{
-        return do_munmap(mm, addr, len);
-}
-
 static inline unsigned long 
 pfm_get_unmapped_area(struct file *file, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags, unsigned long exec)
 {
@@ -1458,8 +1452,9 @@ pfm_unreserve_session(pfm_context_t *ctx, int is_syswide, unsigned int cpu)
  * a PROTECT_CTX() section.
  */
 static int
-pfm_remove_smpl_mapping(struct task_struct *task, void *vaddr, unsigned long size)
+pfm_remove_smpl_mapping(void *vaddr, unsigned long size)
 {
+        struct task_struct *task = current;
         int r;
 
         /* sanity checks */
@@ -1473,13 +1468,8 @@ pfm_remove_smpl_mapping(struct task_struct *task, void *vaddr, unsigned long siz
         /*
          * does the actual unmapping
          */
-        down_write(&task->mm->mmap_sem);
+        r = vm_munmap((unsigned long)vaddr, size);
 
-        DPRINT(("down_write done smpl_vaddr=%p size=%lu\n", vaddr, size));
-
-        r = pfm_do_munmap(task->mm, (unsigned long)vaddr, size, 0);
-
-        up_write(&task->mm->mmap_sem);
         if (r !=0) {
                 printk(KERN_ERR "perfmon: [%d] unable to unmap sampling buffer @%p size=%lu\n", task_pid_nr(task), vaddr, size);
         }
@@ -1945,7 +1935,7 @@ pfm_flush(struct file *filp, fl_owner_t id)
          * because some VM function reenables interrupts.
          *
          */
-        if (smpl_buf_vaddr) pfm_remove_smpl_mapping(current, smpl_buf_vaddr, smpl_buf_size);
+        if (smpl_buf_vaddr) pfm_remove_smpl_mapping(smpl_buf_vaddr, smpl_buf_size);
 
         return 0;
 }