From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 10 Jun 2014 02:08:43 +0000 (-0700)
Subject: Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b1cce8032f6abe900b078d24f3c3938726528f97;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6

Pull CIFS fixes from Steve French.

* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
  CIFS: Fix memory leaks in SMB2_open
  cifs: ensure that vol->username is not NULL before running strlen on it
  Clarify SMB2/SMB3 create context and add missing ones
  Do not send ClientGUID on SMB2.02 dialect
  cifs: Set client guid on per connection basis
  fs/cifs/netmisc.c: convert printk to pr_foo()
  fs/cifs/cifs.c: replace seq_printf by seq_puts
  Update cifs version number to 2.03
  fs: cifs: new helper: file_inode(file)
  cifs: fix potential races in cifs_revalidate_mapping
  cifs: new helper function: cifs_revalidate_mapping
  cifs: convert booleans in cifsInodeInfo to a flags field
  cifs: fix cifs_uniqueid_to_ino_t not to ever return 0
---

b1cce8032f6abe900b078d24f3c3938726528f97
diff --cc fs/cifs/inode.c
index a22d667f1069,9ff8df8b4d84..a174605f6afa
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@@ -1776,6 -1775,50 +1775,50 @@@ cifs_invalidate_mapping(struct inode *i
  	return rc;
  }
  
+ /**
+  * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
+  * @word: long word containing the bit lock
+  */
+ static int
+ cifs_wait_bit_killable(void *word)
+ {
+ 	if (fatal_signal_pending(current))
+ 		return -ERESTARTSYS;
+ 	freezable_schedule_unsafe();
+ 	return 0;
+ }
+ 
+ int
+ cifs_revalidate_mapping(struct inode *inode)
+ {
+ 	int rc;
+ 	unsigned long *flags = &CIFS_I(inode)->flags;
+ 
+ 	rc = wait_on_bit_lock(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
+ 				TASK_KILLABLE);
+ 	if (rc)
+ 		return rc;
+ 
+ 	if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
+ 		rc = cifs_invalidate_mapping(inode);
+ 		if (rc)
+ 			set_bit(CIFS_INO_INVALID_MAPPING, flags);
+ 	}
+ 
+ 	clear_bit_unlock(CIFS_INO_LOCK, flags);
 -	smp_mb__after_clear_bit();
++	smp_mb__after_atomic();
+ 	wake_up_bit(flags, CIFS_INO_LOCK);
+ 
+ 	return rc;
+ }
+ 
+ int
+ cifs_zap_mapping(struct inode *inode)
+ {
+ 	set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
+ 	return cifs_revalidate_mapping(inode);
+ }
+ 
  int cifs_revalidate_file_attr(struct file *filp)
  {
  	int rc = 0;