[mm][RFC][PATCH 3/11] mm accessor for fs

From: KAMEZAWA Hiroyuki
Date: Tue Dec 15 2009 - 22:06:53 EST

From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>

Replace mmap_sem access with mm_accessor. for /fs layer.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
---
fs/aio.c | 10 +++++-----
fs/binfmt_aout.c | 32 ++++++++++++++++----------------
fs/binfmt_elf.c | 24 ++++++++++++------------
fs/binfmt_elf_fdpic.c | 18 +++++++++---------
fs/binfmt_flat.c | 12 ++++++------
fs/binfmt_som.c | 12 ++++++------
fs/ceph/file.c | 4 ++--
fs/exec.c | 22 +++++++++++-----------
fs/fuse/dev.c | 4 ++--
fs/fuse/file.c | 4 ++--
fs/nfs/direct.c | 8 ++++----
fs/proc/array.c | 4 ++--
fs/proc/base.c | 4 ++--
fs/proc/task_mmu.c | 14 +++++++-------
fs/proc/task_nommu.c | 16 ++++++++--------
15 files changed, 94 insertions(+), 94 deletions(-)

Index: mmotm-mm-accessor/fs/proc/task_mmu.c
===================================================================
--- mmotm-mm-accessor.orig/fs/proc/task_mmu.c
+++ mmotm-mm-accessor/fs/proc/task_mmu.c
@@ -85,7 +85,7 @@ static void vma_stop(struct proc_maps_pr
{
if (vma && vma != priv->tail_vma) {
struct mm_struct *mm = vma->vm_mm;
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
mmput(mm);
}
}
@@ -119,7 +119,7 @@ static void *m_start(struct seq_file *m,
mm = mm_for_maps(priv->task);
if (!mm)
return NULL;
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);

tail_vma = get_gate_vma(priv->task);
priv->tail_vma = tail_vma;
@@ -152,7 +152,7 @@ out:

/* End of vmas has been reached */
m->version = (tail_vma != NULL)? 0: -1UL;
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
mmput(mm);
return tail_vma;
}
@@ -515,7 +515,7 @@ static ssize_t clear_refs_write(struct f
.pmd_entry = clear_refs_pte_range,
.mm = mm,
};
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
clear_refs_walk.private = vma;
if (is_vm_hugetlb_page(vma))
@@ -537,7 +537,7 @@ static ssize_t clear_refs_write(struct f
&clear_refs_walk);
}
flush_tlb_mm(mm);
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
mmput(mm);
}
put_task_struct(task);
@@ -765,10 +765,10 @@ static ssize_t pagemap_read(struct file
if (!pages)
goto out_mm;

- down_read(&current->mm->mmap_sem);
+ mm_read_lock(current->mm);
ret = get_user_pages(current, current->mm, uaddr, pagecount,
1, 0, pages, NULL);
- up_read(&current->mm->mmap_sem);
+ mm_read_unlock(current->mm);

if (ret < 0)
goto out_free;
Index: mmotm-mm-accessor/fs/proc/array.c
===================================================================
--- mmotm-mm-accessor.orig/fs/proc/array.c
+++ mmotm-mm-accessor/fs/proc/array.c
@@ -394,13 +394,13 @@ static inline void task_show_stack_usage
struct mm_struct *mm = get_task_mm(task);

if (mm) {
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);
vma = find_vma(mm, task->stack_start);
if (vma)
seq_printf(m, "Stack usage:\t%lu kB\n",
get_stack_usage_in_bytes(vma, task) >> 10);

- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
mmput(mm);
}
}
Index: mmotm-mm-accessor/fs/proc/base.c
===================================================================
--- mmotm-mm-accessor.orig/fs/proc/base.c
+++ mmotm-mm-accessor/fs/proc/base.c
@@ -1450,11 +1450,11 @@ struct file *get_mm_exe_file(struct mm_s

/* We need mmap_sem to protect against races with removal of
* VM_EXECUTABLE vmas */
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);
exe_file = mm->exe_file;
if (exe_file)
get_file(exe_file);
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
return exe_file;
}

Index: mmotm-mm-accessor/fs/proc/task_nommu.c
===================================================================
--- mmotm-mm-accessor.orig/fs/proc/task_nommu.c
+++ mmotm-mm-accessor/fs/proc/task_nommu.c
@@ -21,7 +21,7 @@ void task_mem(struct seq_file *m, struct
struct rb_node *p;
unsigned long bytes = 0, sbytes = 0, slack = 0, size;

- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {
vma = rb_entry(p, struct vm_area_struct, vm_rb);

@@ -73,7 +73,7 @@ void task_mem(struct seq_file *m, struct
"Shared:\t%8lu bytes\n",
bytes, slack, sbytes);

- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
}

unsigned long task_vsize(struct mm_struct *mm)
@@ -82,12 +82,12 @@ unsigned long task_vsize(struct mm_struc
struct rb_node *p;
unsigned long vsize = 0;

- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {
vma = rb_entry(p, struct vm_area_struct, vm_rb);
vsize += vma->vm_end - vma->vm_start;
}
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
return vsize;
}

@@ -99,7 +99,7 @@ int task_statm(struct mm_struct *mm, int
struct rb_node *p;
int size = kobjsize(mm);

- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {
vma = rb_entry(p, struct vm_area_struct, vm_rb);
size += kobjsize(vma);
@@ -114,7 +114,7 @@ int task_statm(struct mm_struct *mm, int
>> PAGE_SHIFT;
*data = (PAGE_ALIGN(mm->start_stack) - (mm->start_data & PAGE_MASK))
>> PAGE_SHIFT;
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
size >>= PAGE_SHIFT;
size += *text + *data;
*resident = size;
@@ -193,7 +193,7 @@ static void *m_start(struct seq_file *m,
priv->task = NULL;
return NULL;
}
- down_read(&mm->mmap_sem);
+ mm_read_lock(mm);

/* start from the Nth VMA */
for (p = rb_first(&mm->mm_rb); p; p = rb_next(p))
@@ -208,7 +208,7 @@ static void m_stop(struct seq_file *m, v

if (priv->task) {
struct mm_struct *mm = priv->task->mm;
- up_read(&mm->mmap_sem);
+ mm_read_unlock(mm);
mmput(mm);
put_task_struct(priv->task);
}
Index: mmotm-mm-accessor/fs/exec.c
===================================================================
--- mmotm-mm-accessor.orig/fs/exec.c
+++ mmotm-mm-accessor/fs/exec.c
@@ -233,7 +233,7 @@ static int __bprm_mm_init(struct linux_b
if (!vma)
return -ENOMEM;

- down_write(&mm->mmap_sem);
+ mm_write_lock(mm);
vma->vm_mm = mm;

/*
@@ -251,11 +251,11 @@ static int __bprm_mm_init(struct linux_b
goto err;

mm->stack_vm = mm->total_vm = 1;
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);
bprm->p = vma->vm_end - sizeof(void *);
return 0;
err:
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);
bprm->vma = NULL;
kmem_cache_free(vm_area_cachep, vma);
return err;
@@ -600,7 +600,7 @@ int setup_arg_pages(struct linux_binprm
bprm->loader -= stack_shift;
bprm->exec -= stack_shift;

- down_write(&mm->mmap_sem);
+ mm_write_lock(mm);
vm_flags = VM_STACK_FLAGS;

/*
@@ -637,7 +637,7 @@ int setup_arg_pages(struct linux_binprm
ret = -EFAULT;

out_unlock:
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);
return ret;
}
EXPORT_SYMBOL(setup_arg_pages);
@@ -711,9 +711,9 @@ static int exec_mmap(struct mm_struct *m
* through with the exec. We must hold mmap_sem around
* checking core_state and changing tsk->mm.
*/
- down_read(&old_mm->mmap_sem);
+ mm_read_lock(old_mm);
if (unlikely(old_mm->core_state)) {
- up_read(&old_mm->mmap_sem);
+ mm_read_unlock(old_mm);
return -EINTR;
}
}
@@ -725,7 +725,7 @@ static int exec_mmap(struct mm_struct *m
task_unlock(tsk);
arch_pick_mmap_layout(mm);
if (old_mm) {
- up_read(&old_mm->mmap_sem);
+ mm_read_unlock(old_mm);
BUG_ON(active_mm != old_mm);
mm_update_next_owner(old_mm);
mmput(old_mm);
@@ -1642,7 +1642,7 @@ static int coredump_wait(int exit_code,
core_state->dumper.task = tsk;
core_state->dumper.next = NULL;
core_waiters = zap_threads(tsk, mm, core_state, exit_code);
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);

if (unlikely(core_waiters < 0))
goto fail;
@@ -1790,12 +1790,12 @@ void do_coredump(long signr, int exit_co
goto fail;
}

- down_write(&mm->mmap_sem);
+ mm_write_lock(mm);
/*
* If another thread got here first, or we are not dumpable, bail out.
*/
if (mm->core_state || !get_dumpable(mm)) {
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);
put_cred(cred);
goto fail;
}
Index: mmotm-mm-accessor/fs/aio.c
===================================================================
--- mmotm-mm-accessor.orig/fs/aio.c
+++ mmotm-mm-accessor/fs/aio.c
@@ -103,9 +103,9 @@ static void aio_free_ring(struct kioctx
put_page(info->ring_pages[i]);

if (info->mmap_size) {
- down_write(&ctx->mm->mmap_sem);
+ mm_write_lock(ctx->mm);
do_munmap(ctx->mm, info->mmap_base, info->mmap_size);
- up_write(&ctx->mm->mmap_sem);
+ mm_write_unlock(ctx->mm);
}

if (info->ring_pages && info->ring_pages != info->internal_pages)
@@ -144,12 +144,12 @@ static int aio_setup_ring(struct kioctx

info->mmap_size = nr_pages * PAGE_SIZE;
dprintk("attempting mmap of %lu bytes\n", info->mmap_size);
- down_write(&ctx->mm->mmap_sem);
+ mm_write_lock(ctx->mm);
info->mmap_base = do_mmap(NULL, 0, info->mmap_size,
PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE,
0);
if (IS_ERR((void *)info->mmap_base)) {
- up_write(&ctx->mm->mmap_sem);
+ mm_write_unlock(ctx->mm);
info->mmap_size = 0;
aio_free_ring(ctx);
return -EAGAIN;
@@ -159,7 +159,7 @@ static int aio_setup_ring(struct kioctx
info->nr_pages = get_user_pages(current, ctx->mm,
info->mmap_base, nr_pages,
1, 0, info->ring_pages, NULL);
- up_write(&ctx->mm->mmap_sem);
+ mm_write_unlock(ctx->mm);

if (unlikely(info->nr_pages != nr_pages)) {
aio_free_ring(ctx);
Index: mmotm-mm-accessor/fs/binfmt_som.c
===================================================================
--- mmotm-mm-accessor.orig/fs/binfmt_som.c
+++ mmotm-mm-accessor/fs/binfmt_som.c
@@ -147,10 +147,10 @@ static int map_som_binary(struct file *f
code_size = SOM_PAGEALIGN(hpuxhdr->exec_tsize);
current->mm->start_code = code_start;
current->mm->end_code = code_start + code_size;
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
retval = do_mmap(file, code_start, code_size, prot,
flags, SOM_PAGESTART(hpuxhdr->exec_tfile));
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (retval < 0 && retval > -1024)
goto out;

@@ -158,20 +158,20 @@ static int map_som_binary(struct file *f
data_size = SOM_PAGEALIGN(hpuxhdr->exec_dsize);
current->mm->start_data = data_start;
current->mm->end_data = bss_start = data_start + data_size;
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
retval = do_mmap(file, data_start, data_size,
prot | PROT_WRITE, flags,
SOM_PAGESTART(hpuxhdr->exec_dfile));
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (retval < 0 && retval > -1024)
goto out;

som_brk = bss_start + SOM_PAGEALIGN(hpuxhdr->exec_bsize);
current->mm->start_brk = current->mm->brk = som_brk;
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
retval = do_mmap(NULL, bss_start, som_brk - bss_start,
prot | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, 0);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (retval > 0 || retval < -1024)
retval = 0;
out:
Index: mmotm-mm-accessor/fs/binfmt_flat.c
===================================================================
--- mmotm-mm-accessor.orig/fs/binfmt_flat.c
+++ mmotm-mm-accessor/fs/binfmt_flat.c
@@ -539,10 +539,10 @@ static int load_flat_file(struct linux_b
*/
DBG_FLT("BINFMT_FLAT: ROM mapping of file (we hope)\n");

- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
textpos = do_mmap(bprm->file, 0, text_len, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_EXECUTABLE, 0);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (!textpos || IS_ERR_VALUE(textpos)) {
if (!textpos)
textpos = (unsigned long) -ENOMEM;
@@ -553,10 +553,10 @@ static int load_flat_file(struct linux_b

len = data_len + extra + MAX_SHARED_LIBS * sizeof(unsigned long);
len = PAGE_ALIGN(len);
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
realdatastart = do_mmap(0, 0, len,
PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 0);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);

if (realdatastart == 0 || IS_ERR_VALUE(realdatastart)) {
if (!realdatastart)
@@ -600,10 +600,10 @@ static int load_flat_file(struct linux_b

len = text_len + data_len + extra + MAX_SHARED_LIBS * sizeof(unsigned long);
len = PAGE_ALIGN(len);
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
textpos = do_mmap(0, 0, len,
PROT_READ | PROT_EXEC | PROT_WRITE, MAP_PRIVATE, 0);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);

if (!textpos || IS_ERR_VALUE(textpos)) {
if (!textpos)
Index: mmotm-mm-accessor/fs/binfmt_elf_fdpic.c
===================================================================
--- mmotm-mm-accessor.orig/fs/binfmt_elf_fdpic.c
+++ mmotm-mm-accessor/fs/binfmt_elf_fdpic.c
@@ -377,7 +377,7 @@ static int load_elf_fdpic_binary(struct
if (stack_size < PAGE_SIZE * 2)
stack_size = PAGE_SIZE * 2;

- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
current->mm->start_brk = do_mmap(NULL, 0, stack_size,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS |
@@ -385,13 +385,13 @@ static int load_elf_fdpic_binary(struct
0);

if (IS_ERR_VALUE(current->mm->start_brk)) {
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
retval = current->mm->start_brk;
current->mm->start_brk = 0;
goto error_kill;
}

- up_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);

current->mm->brk = current->mm->start_brk;
current->mm->context.end_brk = current->mm->start_brk;
@@ -944,10 +944,10 @@ static int elf_fdpic_map_file_constdisp_
if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE)
mflags |= MAP_EXECUTABLE;

- down_write(&mm->mmap_sem);
+ mm_write_lock(mm);
maddr = do_mmap(NULL, load_addr, top - base,
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0);
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);
if (IS_ERR_VALUE(maddr))
return (int) maddr;

@@ -1093,10 +1093,10 @@ static int elf_fdpic_map_file_by_direct_

/* create the mapping */
disp = phdr->p_vaddr & ~PAGE_MASK;
- down_write(&mm->mmap_sem);
+ mm_write_lock(mm);
maddr = do_mmap(file, maddr, phdr->p_memsz + disp, prot, flags,
phdr->p_offset - disp);
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);

kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx",
loop, phdr->p_memsz + disp, prot, flags,
@@ -1141,10 +1141,10 @@ static int elf_fdpic_map_file_by_direct_
unsigned long xmaddr;

flags |= MAP_FIXED | MAP_ANONYMOUS;
- down_write(&mm->mmap_sem);
+ mm_write_lock(mm);
xmaddr = do_mmap(NULL, xaddr, excess - excess1,
prot, flags, 0);
- up_write(&mm->mmap_sem);
+ mm_write_unlock(mm);

kdebug("mmap[%d] <anon>"
" ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx",
Index: mmotm-mm-accessor/fs/binfmt_elf.c
===================================================================
--- mmotm-mm-accessor.orig/fs/binfmt_elf.c
+++ mmotm-mm-accessor/fs/binfmt_elf.c
@@ -81,9 +81,9 @@ static int set_brk(unsigned long start,
end = ELF_PAGEALIGN(end);
if (end > start) {
unsigned long addr;
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
addr = do_brk(start, end - start);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (BAD_ADDR(addr))
return addr;
}
@@ -332,7 +332,7 @@ static unsigned long elf_map(struct file
if (!size)
return addr;

- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
/*
* total_size is the size of the ELF (interpreter) image.
* The _first_ mmap needs to know the full size, otherwise
@@ -349,7 +349,7 @@ static unsigned long elf_map(struct file
} else
map_addr = do_mmap(filep, addr, size, prot, type, off);

- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
return(map_addr);
}

@@ -517,9 +517,9 @@ static unsigned long load_elf_interp(str
elf_bss = ELF_PAGESTART(elf_bss + ELF_MIN_ALIGN - 1);

/* Map the last of the bss segment */
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_brk(elf_bss, last_bss - elf_bss);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (BAD_ADDR(error))
goto out_close;
}
@@ -978,10 +978,10 @@ static int load_elf_binary(struct linux_
and some applications "depend" upon this behavior.
Since we do not have the power to recompile these, we
emulate the SVr4 behavior. Sigh. */
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_mmap(NULL, 0, PAGE_SIZE, PROT_READ | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE, 0);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
}

#ifdef ELF_PLAT_INIT
@@ -1066,7 +1066,7 @@ static int load_elf_library(struct file
eppnt++;

/* Now use mmap to map the library into memory. */
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_mmap(file,
ELF_PAGESTART(eppnt->p_vaddr),
(eppnt->p_filesz +
@@ -1075,7 +1075,7 @@ static int load_elf_library(struct file
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
(eppnt->p_offset -
ELF_PAGEOFFSET(eppnt->p_vaddr)));
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (error != ELF_PAGESTART(eppnt->p_vaddr))
goto out_free_ph;

@@ -1089,9 +1089,9 @@ static int load_elf_library(struct file
ELF_MIN_ALIGN - 1);
bss = eppnt->p_memsz + eppnt->p_vaddr;
if (bss > len) {
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
do_brk(len, bss - len);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
}
error = 0;

Index: mmotm-mm-accessor/fs/binfmt_aout.c
===================================================================
--- mmotm-mm-accessor.orig/fs/binfmt_aout.c
+++ mmotm-mm-accessor/fs/binfmt_aout.c
@@ -50,9 +50,9 @@ static int set_brk(unsigned long start,
end = PAGE_ALIGN(end);
if (end > start) {
unsigned long addr;
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
addr = do_brk(start, end - start);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (BAD_ADDR(addr))
return addr;
}
@@ -290,9 +290,9 @@ static int load_aout_binary(struct linux
pos = 32;
map_size = ex.a_text+ex.a_data;
#endif
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_brk(text_addr & PAGE_MASK, map_size);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (error != (text_addr & PAGE_MASK)) {
send_sig(SIGKILL, current, 0);
return error;
@@ -323,9 +323,9 @@ static int load_aout_binary(struct linux

if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
loff_t pos = fd_offset;
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
bprm->file->f_op->read(bprm->file,
(char __user *)N_TXTADDR(ex),
ex.a_text+ex.a_data, &pos);
@@ -335,24 +335,24 @@ static int load_aout_binary(struct linux
goto beyond_if;
}

- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
PROT_READ | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
fd_offset);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);

if (error != N_TXTADDR(ex)) {
send_sig(SIGKILL, current, 0);
return error;
}

- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
fd_offset + ex.a_text);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
if (error != N_DATADDR(ex)) {
send_sig(SIGKILL, current, 0);
return error;
@@ -429,9 +429,9 @@ static int load_aout_library(struct file
"N_TXTOFF is not page aligned. Please convert library: %s\n",
file->f_path.dentry->d_name.name);
}
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);

file->f_op->read(file, (char __user *)start_addr,
ex.a_text + ex.a_data, &pos);
@@ -442,12 +442,12 @@ static int load_aout_library(struct file
goto out;
}
/* Now use mmap to map the library into memory. */
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_mmap(file, start_addr, ex.a_text + ex.a_data,
PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
N_TXTOFF(ex));
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
retval = error;
if (error != start_addr)
goto out;
@@ -455,9 +455,9 @@ static int load_aout_library(struct file
len = PAGE_ALIGN(ex.a_text + ex.a_data);
bss = ex.a_text + ex.a_data + ex.a_bss;
if (bss > len) {
- down_write(&current->mm->mmap_sem);
+ mm_write_lock(current->mm);
error = do_brk(start_addr + len, bss - len);
- up_write(&current->mm->mmap_sem);
+ mm_write_unlock(current->mm);
retval = error;
if (error != start_addr + len)
goto out;
Index: mmotm-mm-accessor/fs/ceph/file.c
===================================================================
--- mmotm-mm-accessor.orig/fs/ceph/file.c
+++ mmotm-mm-accessor/fs/ceph/file.c
@@ -279,10 +279,10 @@ static struct page **get_direct_page_vec
if (!pages)
return ERR_PTR(-ENOMEM);

- down_read(&current->mm->mmap_sem);
+ mm_read_lock(current->mm);
rc = get_user_pages(current, current->mm, (unsigned long)data,
num_pages, 0, 0, pages, NULL);
- up_read(&current->mm->mmap_sem);
+ mm_read_unlock(current->mm);
if (rc < 0)
goto fail;
return pages;
Index: mmotm-mm-accessor/fs/fuse/dev.c
===================================================================
--- mmotm-mm-accessor.orig/fs/fuse/dev.c
+++ mmotm-mm-accessor/fs/fuse/dev.c
@@ -551,10 +551,10 @@ static int fuse_copy_fill(struct fuse_co
cs->iov++;
cs->nr_segs--;
}
- down_read(&current->mm->mmap_sem);
+ mm_read_lock(current->mm);
err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
&cs->pg, NULL);
- up_read(&current->mm->mmap_sem);
+ mm_read_unlock(current->mm);
if (err < 0)
return err;
BUG_ON(err != 1);
Index: mmotm-mm-accessor/fs/nfs/direct.c
===================================================================
--- mmotm-mm-accessor.orig/fs/nfs/direct.c
+++ mmotm-mm-accessor/fs/nfs/direct.c
@@ -309,10 +309,10 @@ static ssize_t nfs_direct_read_schedule_
if (unlikely(!data))
break;

- down_read(&current->mm->mmap_sem);
+ mm_read_lock(current->mm);
result = get_user_pages(current, current->mm, user_addr,
data->npages, 1, 0, data->pagevec, NULL);
- up_read(&current->mm->mmap_sem);
+ mm_read_unlock(current->mm);
if (result < 0) {
nfs_readdata_free(data);
break;
@@ -730,10 +730,10 @@ static ssize_t nfs_direct_write_schedule
if (unlikely(!data))
break;

- down_read(&current->mm->mmap_sem);
+ mm_read_lock(current->mm);
result = get_user_pages(current, current->mm, user_addr,
data->npages, 0, 0, data->pagevec, NULL);
- up_read(&current->mm->mmap_sem);
+ mm_read_unlock(current->mm);
if (result < 0) {
nfs_writedata_free(data);
break;
Index: mmotm-mm-accessor/fs/fuse/file.c
===================================================================
--- mmotm-mm-accessor.orig/fs/fuse/file.c
+++ mmotm-mm-accessor/fs/fuse/file.c
@@ -991,10 +991,10 @@ static int fuse_get_user_pages(struct fu
nbytes = min_t(size_t, nbytes, FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT);
npages = (nbytes + offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
npages = clamp(npages, 1, FUSE_MAX_PAGES_PER_REQ);
- down_read(&current->mm->mmap_sem);
+ mm_read_lock(current->mm);
npages = get_user_pages(current, current->mm, user_addr, npages, !write,
0, req->pages, NULL);
- up_read(&current->mm->mmap_sem);
+ mm_read_unlock(current->mm);
if (npages < 0)
return npages;


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