The patch titled maps4: move clear_refs code to task_mmu.c has been removed from the -mm tree. Its filename was maps4-move-clear_refs-code-to-task_mmuc.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: maps4: move clear_refs code to task_mmu.c From: Matt Mackall <mpm@xxxxxxxxxxx> This puts all the clear_refs code where it belongs and probably lets things compile on MMU-less systems as well. Signed-off-by: Matt Mackall <mpm@xxxxxxxxxxx> Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Dave Hansen <haveblue@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/proc/base.c | 40 ---------------------------------- fs/proc/internal.h | 6 ----- fs/proc/task_mmu.c | 44 +++++++++++++++++++++++++++++++------- include/linux/proc_fs.h | 3 +- 4 files changed, 39 insertions(+), 54 deletions(-) diff -puN fs/proc/base.c~maps4-move-clear_refs-code-to-task_mmuc fs/proc/base.c --- a/fs/proc/base.c~maps4-move-clear_refs-code-to-task_mmuc +++ a/fs/proc/base.c @@ -88,10 +88,6 @@ * in /proc for a task before it execs a suid executable. */ - -/* Worst case buffer size needed for holding an integer. */ -#define PROC_NUMBUF 13 - struct pid_entry { char *name; int len; @@ -935,42 +931,6 @@ static const struct file_operations proc .write = oom_adjust_write, }; -#ifdef CONFIG_MMU -static ssize_t clear_refs_write(struct file *file, const char __user *buf, - size_t count, loff_t *ppos) -{ - struct task_struct *task; - char buffer[PROC_NUMBUF], *end; - struct mm_struct *mm; - - memset(buffer, 0, sizeof(buffer)); - if (count > sizeof(buffer) - 1) - count = sizeof(buffer) - 1; - if (copy_from_user(buffer, buf, count)) - return -EFAULT; - if (!simple_strtol(buffer, &end, 0)) - return -EINVAL; - if (*end == '\n') - end++; - task = get_proc_task(file->f_path.dentry->d_inode); - if (!task) - return -ESRCH; - mm = get_task_mm(task); - if (mm) { - clear_refs_smap(mm); - mmput(mm); - } - put_task_struct(task); - if (end - buffer == 0) - return -EIO; - return end - buffer; -} - -static struct file_operations proc_clear_refs_operations = { - .write = clear_refs_write, -}; -#endif - #ifdef CONFIG_AUDITSYSCALL #define TMPBUFLEN 21 static ssize_t proc_loginuid_read(struct file * file, char __user * buf, diff -puN fs/proc/internal.h~maps4-move-clear_refs-code-to-task_mmuc fs/proc/internal.h --- a/fs/proc/internal.h~maps4-move-clear_refs-code-to-task_mmuc +++ a/fs/proc/internal.h @@ -56,11 +56,7 @@ extern int proc_pid_statm(struct task_st extern const struct file_operations proc_maps_operations; extern const struct file_operations proc_numa_maps_operations; extern const struct file_operations proc_smaps_operations; - -extern const struct file_operations proc_maps_operations; -extern const struct file_operations proc_numa_maps_operations; -extern const struct file_operations proc_smaps_operations; - +extern const struct file_operations proc_clear_refs_operations; void free_proc_entry(struct proc_dir_entry *de); diff -puN fs/proc/task_mmu.c~maps4-move-clear_refs-code-to-task_mmuc fs/proc/task_mmu.c --- a/fs/proc/task_mmu.c~maps4-move-clear_refs-code-to-task_mmuc +++ a/fs/proc/task_mmu.c @@ -323,19 +323,47 @@ static int show_smap(struct seq_file *m, static struct mm_walk clear_refs_walk = { .pmd_entry = clear_refs_pte_range }; -void clear_refs_smap(struct mm_struct *mm) +static ssize_t clear_refs_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) { + struct task_struct *task; + char buffer[PROC_NUMBUF], *end; + struct mm_struct *mm; 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)) - walk_page_range(vma->vm_mm, vma->vm_start, vma->vm_end, - &clear_refs_walk, vma); - flush_tlb_mm(mm); - up_read(&mm->mmap_sem); + memset(buffer, 0, sizeof(buffer)); + if (count > sizeof(buffer) - 1) + count = sizeof(buffer) - 1; + if (copy_from_user(buffer, buf, count)) + return -EFAULT; + if (!simple_strtol(buffer, &end, 0)) + return -EINVAL; + if (*end == '\n') + end++; + task = get_proc_task(file->f_path.dentry->d_inode); + if (!task) + return -ESRCH; + mm = get_task_mm(task); + if (mm) { + down_read(&mm->mmap_sem); + for (vma = mm->mmap; vma; vma = vma->vm_next) + if (!is_vm_hugetlb_page(vma)) + walk_page_range(mm, vma->vm_start, vma->vm_end, + &clear_refs_walk, vma); + flush_tlb_mm(mm); + up_read(&mm->mmap_sem); + mmput(mm); + } + put_task_struct(task); + if (end - buffer == 0) + return -EIO; + return end - buffer; } +const struct file_operations proc_clear_refs_operations = { + .write = clear_refs_write, +}; + static void *m_start(struct seq_file *m, loff_t *pos) { struct proc_maps_private *priv = m->private; diff -puN include/linux/proc_fs.h~maps4-move-clear_refs-code-to-task_mmuc include/linux/proc_fs.h --- a/include/linux/proc_fs.h~maps4-move-clear_refs-code-to-task_mmuc +++ a/include/linux/proc_fs.h @@ -19,6 +19,8 @@ struct completion; */ #define FIRST_PROCESS_ENTRY 256 +/* Worst case buffer size needed for holding an integer. */ +#define PROC_NUMBUF 13 /* * We always define these enumerators @@ -117,7 +119,6 @@ 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 mm_struct *mm); struct proc_dir_entry *de_get(struct proc_dir_entry *de); void de_put(struct proc_dir_entry *de); _ Patches currently in -mm which might be from mpm@xxxxxxxxxxx are origin.patch drivers-char-randomcwrite_pool-cond_resched-needed.patch random-clean-up-checkpatch-complaints.patch random-clean-up-checkpatch-complaints-fix.patch random-consolidate-wakeup-logic.patch random-use-unlocked_ioctl.patch random-reuse-rand_initialize.patch random-improve-variable-naming-clear-extract-buffer.patch random-make-backtracking-attacks-harder.patch random-remove-cacheline-alignment-for-locks.patch random-eliminate-redundant-new_rotate-variable.patch random-remove-some-prefetch-logic.patch random-simplify-add_ptr-logic.patch random-make-mixing-interface-byte-oriented.patch random-simplify-and-rename-credit_entropy_store.patch random-add-async-notification-support-to-dev-random.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html