Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...

[pandora-kernel.git] / fs / proc / generic.c

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 43e54e8..4fb81e9 100644 (file)
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -300,10 +300,10 @@ out:
        return rtn;
 }
 
-static DEFINE_IDR(proc_inum_idr);
+static DEFINE_IDA(proc_inum_ida);
 static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
 
-#define PROC_DYNAMIC_FIRST 0xF0000000UL
+#define PROC_DYNAMIC_FIRST 0xF0000000U
 
 /*
  * Return an inode number between PROC_DYNAMIC_FIRST and
@@ -311,36 +311,33 @@ static DEFINE_SPINLOCK(proc_inum_lock); /* protects the above */
  */
 static unsigned int get_inode_number(void)
 {
-       int i, inum = 0;
+       unsigned int i;
        int error;
 
 retry:
-       if (idr_pre_get(&proc_inum_idr, GFP_KERNEL) == 0)
+       if (ida_pre_get(&proc_inum_ida, GFP_KERNEL) == 0)
                return 0;
 
        spin_lock(&proc_inum_lock);
-       error = idr_get_new(&proc_inum_idr, NULL, &i);
+       error = ida_get_new(&proc_inum_ida, &i);
        spin_unlock(&proc_inum_lock);
        if (error == -EAGAIN)
                goto retry;
        else if (error)
                return 0;
 
-       inum = (i & MAX_ID_MASK) + PROC_DYNAMIC_FIRST;
-
-       /* inum will never be more than 0xf0ffffff, so no check
-        * for overflow.
-        */
-
-       return inum;
+       if (i > UINT_MAX - PROC_DYNAMIC_FIRST) {
+               spin_lock(&proc_inum_lock);
+               ida_remove(&proc_inum_ida, i);
+               spin_unlock(&proc_inum_lock);
+       }
+       return PROC_DYNAMIC_FIRST + i;
 }
 
 static void release_inode_number(unsigned int inum)
 {
-       int id = (inum - PROC_DYNAMIC_FIRST) | ~MAX_ID_MASK;
-
        spin_lock(&proc_inum_lock);
-       idr_remove(&proc_inum_idr, id);
+       ida_remove(&proc_inum_ida, inum - PROC_DYNAMIC_FIRST);
        spin_unlock(&proc_inum_lock);
 }
 
@@ -597,6 +594,7 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
        ent->pde_users = 0;
        spin_lock_init(&ent->pde_unload_lock);
        ent->pde_unload_completion = NULL;
+       INIT_LIST_HEAD(&ent->pde_openers);
  out:
        return ent;
 }
@@ -789,15 +787,25 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
        spin_unlock(&de->pde_unload_lock);
 
 continue_removing:
+       spin_lock(&de->pde_unload_lock);
+       while (!list_empty(&de->pde_openers)) {
+               struct pde_opener *pdeo;
+
+               pdeo = list_first_entry(&de->pde_openers, struct pde_opener, lh);
+               list_del(&pdeo->lh);
+               spin_unlock(&de->pde_unload_lock);
+               pdeo->release(pdeo->inode, pdeo->file);
+               kfree(pdeo);
+               spin_lock(&de->pde_unload_lock);
+       }
+       spin_unlock(&de->pde_unload_lock);
+
        if (S_ISDIR(de->mode))
                parent->nlink--;
        de->nlink = 0;
-       if (de->subdir) {
-               printk(KERN_WARNING "%s: removing non-empty directory "
+       WARN(de->subdir, KERN_WARNING "%s: removing non-empty directory "
                        "'%s/%s', leaking at least '%s'\n", __func__,
                        de->parent->name, de->name, de->subdir->name);
-               WARN_ON(1);
-       }
        if (atomic_dec_and_test(&de->count))
                free_proc_entry(de);
 }