The patch titled
smaps-add-clear_refs-file-to-clear-reference-fix
has been added to the -mm tree. Its filename is
smaps-add-clear_refs-file-to-clear-reference-fix.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: smaps-add-clear_refs-file-to-clear-reference-fix
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: Christoph Lameter <clameter@xxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/base.c | 7 ++++++-
fs/proc/task_mmu.c | 8 ++++++--
include/linux/proc_fs.h | 2 +-
3 files changed, 13 insertions(+), 4 deletions(-)
diff -puN fs/proc/base.c~smaps-add-clear_refs-file-to-clear-reference-fix fs/proc/base.c
--- a/fs/proc/base.c~smaps-add-clear_refs-file-to-clear-reference-fix
+++ a/fs/proc/base.c
@@ -720,6 +720,7 @@ static ssize_t clear_refs_write(struct f
{
struct task_struct *task;
char buffer[PROC_NUMBUF], *end;
+ struct mm_struct *mm;
memset(buffer, 0, sizeof(buffer));
if (count > sizeof(buffer) - 1)
@@ -733,7 +734,11 @@ static ssize_t clear_refs_write(struct f
task = get_proc_task(file->f_path.dentry->d_inode);
if (!task)
return -ESRCH;
- clear_refs_smap(task->mm->mmap);
+ mm = get_task_mm(task);
+ if (mm) {
+ clear_refs_smap(mm);
+ mmput(mm);
+ }
put_task_struct(task);
if (end - buffer == 0)
return -EIO;
diff -puN fs/proc/task_mmu.c~smaps-add-clear_refs-file-to-clear-reference-fix fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~smaps-add-clear_refs-file-to-clear-reference-fix
+++ a/fs/proc/task_mmu.c
@@ -350,11 +350,15 @@ static int show_smap(struct seq_file *m,
return show_map_internal(m, v, &mss);
}
-void clear_refs_smap(struct vm_area_struct *vma)
+void clear_refs_smap(struct mm_struct *mm)
{
- for (; vma; vma = vma->vm_next)
+ struct vm_area_struct *vma;
+
+ down_read(&mm->mmap_sem);
+ for (vma = mm->mmap; vma; vma = vma->vm_next)
if (vma->vm_mm && !is_vm_hugetlb_page(vma))
for_each_pmd(vma, clear_refs_one_pmd, NULL);
+ up_read(&mm->mmap_sem);
}
static void *m_start(struct seq_file *m, loff_t *pos)
diff -puN include/linux/proc_fs.h~smaps-add-clear_refs-file-to-clear-reference-fix include/linux/proc_fs.h
--- a/include/linux/proc_fs.h~smaps-add-clear_refs-file-to-clear-reference-fix
+++ a/include/linux/proc_fs.h
@@ -104,7 +104,7 @@ int proc_pid_readdir(struct file * filp,
unsigned long task_vsize(struct mm_struct *);
int task_statm(struct mm_struct *, int *, int *, int *, int *);
char *task_mem(struct mm_struct *, char *);
-void clear_refs_smap(struct vm_area_struct *);
+void clear_refs_smap(struct mm_struct *mm);
extern struct proc_dir_entry *create_proc_entry(const char *name, mode_t mode,
struct proc_dir_entry *parent);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
acpi-bay-driver-warning-fix.patch
git-cifs-fix.patch
fix-warning-in-device_add_attrs.patch
git-drm.patch
git-dvb.patch
kthread-api-conversion-for-dvb_frontend-and-av7110-fix.patch
git-infiniband.patch
git-libata-all.patch
sis-warning-fixes.patch
git-libata-all-lib-iomapc-fix-for-config_pci=n.patch
git-md-accel-fixes.patch
git-md-accel-warning-fixes.patch
git-md-accel-fix.patch
git-netdev-all.patch
revert-drivers-net-tulip-dmfe-support-basic-carrier-detection.patch
git-net.patch
git-backlight-acpi-fix.patch
git-backlight-asus-fix.patch
git-backlight-sony-fix.patch
git-sh.patch
git-scsi-misc.patch
git-scsi-misc-fixup.patch
revert-md-avoid-possible-bug_on-in-md-bitmap-handling-for-git-block.patch
git-block.patch
revert-x86_64-mm-msr-on-cpu.patch
x86_64-survive-having-no-irq-mapping-for-a-vector-fix.patch
mm-vm_insert_pfn-tidy.patch
smaps-add-clear_refs-file-to-clear-reference-fix.patch
swiotlb-uninlinings.patch
kprobes-list-all-active-probes-in-the-system-tidy.patch
mm-shrink-parent-dentries-when-shrinking-slab.patch
knfsd-sunrpc-teach-svc_sendto-to-deal-with-ipv6-addresses-tidy.patch
knfsd-sunrpc-support-ipv6-addresses-in-rpc-servers-udp-receive-path-tidy.patch
revert-x86_64-mm-putreg-check.patch
fix-utrace-utrace-ptrace-compat.patch
fbdev-driver-for-s3-trio-virge-update-2-fix.patch
deprecate-sa_interrupt-and-friends.patch
git-gccbug-fixup.patch
-
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