From: Davidlohr Bueso <d...@stgolabs.net>
This becomes quite straightforward with the mmrange in place.
Signed-off-by: Davidlohr Bueso <dbu...@suse.de>
---
arch/ia64/kernel/perfmon.c | 10 +++++-----
arch/ia64/mm/fault.c | 8 ++++----
arch/ia64/mm/init.c | 13 +++++++------
3 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 858602494096..53cde97fe67a 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2244,7 +2244,7 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct
file *filp, pfm_context_t
struct vm_area_struct *vma = NULL;
unsigned long size;
void *smpl_buf;
-
+ DEFINE_RANGE_LOCK_FULL(mmrange);
/*
* the fixed header + requested size and align to page boundary
@@ -2307,13 +2307,13 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct
file *filp, pfm_context_t
* now we atomically find some area in the address space and
* remap the buffer in it.
*/
- down_write(&task->mm->mmap_sem);
+ mm_write_lock(task->mm, &mmrange);
/* find some free area in address space, must have mmap sem held */
vma->vm_start = get_unmapped_area(NULL, 0, size, 0,
MAP_PRIVATE|MAP_ANONYMOUS);
if (IS_ERR_VALUE(vma->vm_start)) {
DPRINT(("Cannot find unmapped area for size %ld\n", size));
- up_write(&task->mm->mmap_sem);
+ mm_write_unlock(task->mm, &mmrange);
goto error;
}
vma->vm_end = vma->vm_start + size;
@@ -2324,7 +2324,7 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct
file *filp, pfm_context_t
/* can only be applied to current task, need to have the mm semaphore
held when called */
if (pfm_remap_buffer(vma, (unsigned long)smpl_buf, vma->vm_start,
size)) {
DPRINT(("Can't remap buffer\n"));
- up_write(&task->mm->mmap_sem);
+ mm_write_unlock(task->mm, &mmrange);
goto error;
}
@@ -2335,7 +2335,7 @@ pfm_smpl_buffer_alloc(struct task_struct *task, struct
file *filp, pfm_context_t
insert_vm_struct(mm, vma);
vm_stat_account(vma->vm_mm, vma->vm_flags, vma_pages(vma));
- up_write(&task->mm->mmap_sem);
+ mm_write_unlock(task->mm, &mmrange);
/*
* keep track of user level virtual address
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 44f0ec5f77c2..9d379a9a9a5c 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -126,7 +126,7 @@ ia64_do_page_fault (unsigned long address, unsigned long
isr, struct pt_regs *re
if (mask & VM_WRITE)
flags |= FAULT_FLAG_WRITE;
retry:
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm, &mmrange);
vma = find_vma_prev(mm, address, &prev_vma);
if (!vma && !prev_vma )
@@ -203,7 +203,7 @@ ia64_do_page_fault (unsigned long address, unsigned long
isr, struct pt_regs *re
}
}
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm, &mmrange);
return;
check_expansion:
@@ -234,7 +234,7 @@ ia64_do_page_fault (unsigned long address, unsigned long
isr, struct pt_regs *re
goto good_area;
bad_area:
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm, &mmrange);
#ifdef CONFIG_VIRTUAL_MEM_MAP
bad_area_no_up:
#endif
@@ -305,7 +305,7 @@ ia64_do_page_fault (unsigned long address, unsigned long
isr, struct pt_regs *re
return;
out_of_memory:
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm, &mmrange);
if (!user_mode(regs))
goto no_context;
pagefault_out_of_memory();
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 18278b448530..a870478bbe16 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -106,6 +106,7 @@ void
ia64_init_addr_space (void)
{
struct vm_area_struct *vma;
+ DEFINE_RANGE_LOCK_FULL(mmrange);
ia64_set_rbs_bot();
@@ -122,13 +123,13 @@ ia64_init_addr_space (void)
vma->vm_end = vma->vm_start + PAGE_SIZE;
vma->vm_flags = VM_DATA_DEFAULT_FLAGS|VM_GROWSUP|VM_ACCOUNT;
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
- down_write(¤t->mm->mmap_sem);
+ mm_write_lock(current->mm, &mmrange);
if (insert_vm_struct(current->mm, vma)) {
- up_write(¤t->mm->mmap_sem);
+ mm_write_unlock(current->mm, &mmrange);
kmem_cache_free(vm_area_cachep, vma);
return;
}
- up_write(¤t->mm->mmap_sem);
+ mm_write_unlock(current->mm, &mmrange);
}
/* map NaT-page at address zero to speed up speculative dereferencing
of NULL: */
@@ -141,13 +142,13 @@ ia64_init_addr_space (void)
vma->vm_page_prot = __pgprot(pgprot_val(PAGE_READONLY)
| _PAGE_MA_NAT);
vma->vm_flags = VM_READ | VM_MAYREAD | VM_IO |
VM_DONTEXPAND | VM_DONTDUMP;
- down_write(¤t->mm->mmap_sem);
+ mm_write_lock(current->mm, &mmrange);
if (insert_vm_struct(current->mm, vma)) {
- up_write(¤t->mm->mmap_sem);
+ mm_write_unlock(current->mm, &mmrange);
kmem_cache_free(vm_area_cachep, vma);
return;
}
- up_write(¤t->mm->mmap_sem);
+ mm_write_unlock(current->mm, &mmrange);
}
}
}
--
2.13.6
