diff options
Diffstat (limited to 'fs/aio.c')
| -rw-r--r-- | fs/aio.c | 47 |
1 files changed, 1 insertions, 46 deletions
@@ -24,6 +24,7 @@ #include <linux/file.h> #include <linux/mm.h> #include <linux/mman.h> +#include <linux/mmu_context.h> #include <linux/slab.h> #include <linux/timer.h> #include <linux/aio.h> @@ -34,7 +35,6 @@ #include <asm/kmap_types.h> #include <asm/uaccess.h> -#include <asm/mmu_context.h> #if DEBUG > 1 #define dprintk printk @@ -595,51 +595,6 @@ static struct kioctx *lookup_ioctx(unsigned long ctx_id) } /* - * use_mm - * Makes the calling kernel thread take on the specified - * mm context. - * Called by the retry thread execute retries within the - * iocb issuer's mm context, so that copy_from/to_user - * operations work seamlessly for aio. - * (Note: this routine is intended to be called only - * from a kernel thread context) - */ -static void use_mm(struct mm_struct *mm) -{ - struct mm_struct *active_mm; - struct task_struct *tsk = current; - - task_lock(tsk); - active_mm = tsk->active_mm; - atomic_inc(&mm->mm_count); - tsk->mm = mm; - tsk->active_mm = mm; - switch_mm(active_mm, mm, tsk); - task_unlock(tsk); - - mmdrop(active_mm); -} - -/* - * unuse_mm - * Reverses the effect of use_mm, i.e. releases the - * specified mm context which was earlier taken on - * by the calling kernel thread - * (Note: this routine is intended to be called only - * from a kernel thread context) - */ -static void unuse_mm(struct mm_struct *mm) -{ - struct task_struct *tsk = current; - - task_lock(tsk); - tsk->mm = NULL; - /* active_mm is still 'mm' */ - enter_lazy_tlb(mm, tsk); - task_unlock(tsk); -} - -/* * Queue up a kiocb to be retried. Assumes that the kiocb * has already been marked as kicked, and places it on * the retry run list for the corresponding ioctx, if it |