Merge 4.4.83 into android-4.4

Changes in 4.4.83
	cpuset: fix a deadlock due to incomplete patching of cpusets_enabled()
	mm: ratelimit PFNs busy info message
	iscsi-target: fix memory leak in iscsit_setup_text_cmd()
	iscsi-target: Fix iscsi_np reset hung task during parallel delete
	fuse: initialize the flock flag in fuse_file on allocation
	nfs/flexfiles: fix leak of nfs4_ff_ds_version arrays
	USB: serial: option: add D-Link DWM-222 device ID
	USB: serial: cp210x: add support for Qivicon USB ZigBee dongle
	USB: serial: pl2303: add new ATEN device id
	usb: musb: fix tx fifo flush handling again
	USB: hcd: Mark secondary HCD as dead if the primary one died
	staging:iio:resolver:ad2s1210 fix negative IIO_ANGL_VEL read
	iio: accel: bmc150: Always restore device to normal mode after suspend-resume
	iio: light: tsl2563: use correct event code
	uas: Add US_FL_IGNORE_RESIDUE for Initio Corporation INIC-3069
	USB: Check for dropped connection before switching to full speed
	usb: core: unlink urbs from the tail of the endpoint's urb_list
	usb: quirks: Add no-lpm quirk for Moshi USB to Ethernet Adapter
	usb:xhci:Add quirk for Certain failing HP keyboard on reset after resume
	iio: adc: vf610_adc: Fix VALT selection value for REFSEL bits
	pnfs/blocklayout: require 64-bit sector_t
	pinctrl: sunxi: add a missing function of A10/A20 pinctrl driver
	pinctrl: samsung: Remove bogus irq_[un]mask from resource management
	Linux 4.4.83

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index 85a868ccb493..8397dc235e84 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -16,6 +16,7 @@
 
 #ifdef CONFIG_CPUSETS
 
+extern struct static_key cpusets_pre_enable_key;
 extern struct static_key cpusets_enabled_key;
 static inline bool cpusets_enabled(void)
 {
@@ -30,12 +31,14 @@ static inline int nr_cpusets(void)
 
 static inline void cpuset_inc(void)
 {
+	static_key_slow_inc(&cpusets_pre_enable_key);
 	static_key_slow_inc(&cpusets_enabled_key);
 }
 
 static inline void cpuset_dec(void)
 {
 	static_key_slow_dec(&cpusets_enabled_key);
+	static_key_slow_dec(&cpusets_pre_enable_key);
 }
 
 extern int cpuset_init(void);
@@ -104,7 +107,7 @@ extern void cpuset_print_current_mems_allowed(void);
  */
 static inline unsigned int read_mems_allowed_begin(void)
 {
-	if (!cpusets_enabled())
+	if (!static_key_false(&cpusets_pre_enable_key))
 		return 0;
 
 	return read_seqcount_begin(&current->mems_allowed_seq);
@@ -118,7 +121,7 @@ static inline unsigned int read_mems_allowed_begin(void)
  */
 static inline bool read_mems_allowed_retry(unsigned int seq)
 {
-	if (!cpusets_enabled())
+	if (!static_key_false(&cpusets_enabled_key))
 		return false;
 
 	return read_seqcount_retry(&current->mems_allowed_seq, seq);