Merge 4.4.176 into android-4.4-p

Changes in 4.4.176
	net: fix IPv6 prefix route residue
	vsock: cope with memory allocation failure at socket creation time
	hwmon: (lm80) Fix missing unlock on error in set_fan_div()
	net: Fix for_each_netdev_feature on Big endian
	sky2: Increase D3 delay again
	net: Add header for usage of fls64()
	tcp: tcp_v4_err() should be more careful
	net: Do not allocate page fragments that are not skb aligned
	tcp: clear icsk_backoff in tcp_write_queue_purge()
	vxlan: test dev->flags & IFF_UP before calling netif_rx()
	net: stmmac: Fix a race in EEE enable callback
	net: ipv4: use a dedicated counter for icmp_v4 redirect packets
	x86: livepatch: Treat R_X86_64_PLT32 as R_X86_64_PC32
	kvm: fix kvm_ioctl_create_device() reference counting (CVE-2019-6974)
	mfd: as3722: Handle interrupts on suspend
	mfd: as3722: Mark PM functions as __maybe_unused
	net/x25: do not hold the cpu too long in x25_new_lci()
	mISDN: fix a race in dev_expire_timer()
	ax25: fix possible use-after-free
	KVM: VMX: Fix x2apic check in vmx_msr_bitmap_mode()
	Linux 4.4.176

Change-Id: I82b10bb7d9692d4fe0386744934f09557d65ffe6
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

1 files changed, 22 insertions, 2 deletions

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index f0d87347df19..0508fcc67480 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -11,6 +11,8 @@
 #define _LINUX_NETDEV_FEATURES_H
 
 #include <linux/types.h>
+#include <linux/bitops.h>
+#include <asm/byteorder.h>
 
 typedef u64 netdev_features_t;
 
@@ -125,8 +127,26 @@ enum {
 #define NETIF_F_HW_L2FW_DOFFLOAD	__NETIF_F(HW_L2FW_DOFFLOAD)
 #define NETIF_F_BUSY_POLL	__NETIF_F(BUSY_POLL)
 
-#define for_each_netdev_feature(mask_addr, bit)	\
-	for_each_set_bit(bit, (unsigned long *)mask_addr, NETDEV_FEATURE_COUNT)
+/* Finds the next feature with the highest number of the range of start till 0.
+ */
+static inline int find_next_netdev_feature(u64 feature, unsigned long start)
+{
+	/* like BITMAP_LAST_WORD_MASK() for u64
+	 * this sets the most significant 64 - start to 0.
+	 */
+	feature &= ~0ULL >> (-start & ((sizeof(feature) * 8) - 1));
+
+	return fls64(feature) - 1;
+}
+
+/* This goes for the MSB to the LSB through the set feature bits,
+ * mask_addr should be a u64 and bit an int
+ */
+#define for_each_netdev_feature(mask_addr, bit)				\
+	for ((bit) = find_next_netdev_feature((mask_addr),		\
+					      NETDEV_FEATURE_COUNT);	\
+	     (bit) >= 0;						\
+	     (bit) = find_next_netdev_feature((mask_addr), (bit) - 1))
 
 /* Features valid for ethtool to change */
 /* = all defined minus driver/device-class-related */