kernel: bump 4.9 to 4.9.116

Refreshed all patches

Remove upstreamed patches.
- 103-MIPS-ath79-fix-register-address-in-ath79_ddr_wb_flus.patch
- 403-mtd_fix_cfi_cmdset_0002_status_check.patch
- 001-4.11-01-mtd-m25p80-consider-max-message-size-in-m25p80_read.patch
- 001-4.15-08-bcm63xx_enet-correct-clock-usage.patch
- 001-4.15-09-bcm63xx_enet-do-not-write-to-random-DMA-channel-on-B.patch
- 900-gen_stats-fix-netlink-stats-padding.patch

Introduce a new backported patch to address ext4 breakage, introduced in 4.9.112
- backport-4.9/500-ext4-fix-check-to-prevent-initializing-reserved-inod.patch

This patch has been slightly altered to compensate for a new helper function
introduced in later kernels.

Also add ARM64_SSBD symbol to ARM64 targets still running kernel 4.9

Compile-tested on: ar71xx, bcm2710
Runtime-tested on: ar71xx

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

15 files changed, 98 insertions, 33 deletions

diff --git a/target/linux/generic/backport-4.9/012-kbuild-add-macro-for-controlling-warnings-to-linux-c.patch b/target/linux/generic/backport-4.9/012-kbuild-add-macro-for-controlling-warnings-to-linux-c.patch
index 0511a92eeb..ccc7232751 100644
--- a/target/linux/generic/backport-4.9/012-kbuild-add-macro-for-controlling-warnings-to-linux-c.patch
+++ b/target/linux/generic/backport-4.9/012-kbuild-add-macro-for-controlling-warnings-to-linux-c.patch
@@ -84,7 +84,7 @@ Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
 
 --- a/include/linux/compiler-gcc.h
 +++ b/include/linux/compiler-gcc.h
-@@ -315,3 +315,28 @@
+@@ -334,3 +334,28 @@
   * code
   */
  #define uninitialized_var(x) x = x
diff --git a/target/linux/generic/backport-4.9/024-1-tcp-tsq-add-tsq_flags-tsq_enum.patch b/target/linux/generic/backport-4.9/024-1-tcp-tsq-add-tsq_flags-tsq_enum.patch
index 7bf4fd47d2..172e714c5d 100644
--- a/target/linux/generic/backport-4.9/024-1-tcp-tsq-add-tsq_flags-tsq_enum.patch
+++ b/target/linux/generic/backport-4.9/024-1-tcp-tsq-add-tsq_flags-tsq_enum.patch
@@ -45,7 +45,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  	return (struct tcp_sock *)sk;
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -784,10 +784,10 @@ static void tcp_tasklet_func(unsigned lo
+@@ -789,10 +789,10 @@ static void tcp_tasklet_func(unsigned lo
  	}
  }
  
@@ -60,7 +60,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  /**
   * tcp_release_cb - tcp release_sock() callback
   * @sk: socket
-@@ -808,7 +808,7 @@ void tcp_release_cb(struct sock *sk)
+@@ -813,7 +813,7 @@ void tcp_release_cb(struct sock *sk)
  		nflags = flags & ~TCP_DEFERRED_ALL;
  	} while (cmpxchg(&tp->tsq_flags, flags, nflags) != flags);
  
@@ -69,7 +69,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		tcp_tsq_handler(sk);
  
  	/* Here begins the tricky part :
-@@ -822,15 +822,15 @@ void tcp_release_cb(struct sock *sk)
+@@ -827,15 +827,15 @@ void tcp_release_cb(struct sock *sk)
  	 */
  	sock_release_ownership(sk);
  
diff --git a/target/linux/generic/backport-4.9/024-2-tcp-tsq-remove-one-locked-operation-in-tcp_wfree.patch b/target/linux/generic/backport-4.9/024-2-tcp-tsq-remove-one-locked-operation-in-tcp_wfree.patch
index 914be607e7..af194b2bed 100644
--- a/target/linux/generic/backport-4.9/024-2-tcp-tsq-remove-one-locked-operation-in-tcp_wfree.patch
+++ b/target/linux/generic/backport-4.9/024-2-tcp-tsq-remove-one-locked-operation-in-tcp_wfree.patch
@@ -17,7 +17,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -860,6 +860,7 @@ void tcp_wfree(struct sk_buff *skb)
+@@ -865,6 +865,7 @@ void tcp_wfree(struct sk_buff *skb)
  {
  	struct sock *sk = skb->sk;
  	struct tcp_sock *tp = tcp_sk(sk);
@@ -25,7 +25,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  	int wmem;
  
  	/* Keep one reference on sk_wmem_alloc.
-@@ -877,11 +878,17 @@ void tcp_wfree(struct sk_buff *skb)
+@@ -882,11 +883,17 @@ void tcp_wfree(struct sk_buff *skb)
  	if (wmem >= SKB_TRUESIZE(1) && this_cpu_ksoftirqd() == current)
  		goto out;
  
diff --git a/target/linux/generic/backport-4.9/024-3-tcp-tsq-add-shortcut-in-tcp_tasklet_func.patch b/target/linux/generic/backport-4.9/024-3-tcp-tsq-add-shortcut-in-tcp_tasklet_func.patch
index f5004d3ffc..b9b3c55076 100644
--- a/target/linux/generic/backport-4.9/024-3-tcp-tsq-add-shortcut-in-tcp_tasklet_func.patch
+++ b/target/linux/generic/backport-4.9/024-3-tcp-tsq-add-shortcut-in-tcp_tasklet_func.patch
@@ -22,7 +22,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -767,19 +767,19 @@ static void tcp_tasklet_func(unsigned lo
+@@ -772,19 +772,19 @@ static void tcp_tasklet_func(unsigned lo
  	list_for_each_safe(q, n, &list) {
  		tp = list_entry(q, struct tcp_sock, tsq_node);
  		list_del(&tp->tsq_node);
@@ -51,7 +51,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		sk_free(sk);
  	}
  }
-@@ -884,7 +884,7 @@ void tcp_wfree(struct sk_buff *skb)
+@@ -889,7 +889,7 @@ void tcp_wfree(struct sk_buff *skb)
  		if (!(oval & TSQF_THROTTLED) || (oval & TSQF_QUEUED))
  			goto out;
  
@@ -60,7 +60,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		nval = cmpxchg(&tp->tsq_flags, oval, nval);
  		if (nval != oval)
  			continue;
-@@ -2210,6 +2210,8 @@ static bool tcp_write_xmit(struct sock *
+@@ -2222,6 +2222,8 @@ static bool tcp_write_xmit(struct sock *
  		    unlikely(tso_fragment(sk, skb, limit, mss_now, gfp)))
  			break;
  
diff --git a/target/linux/generic/backport-4.9/024-4-tcp-tsq-avoid-one-atomic-in-tcp_wfree.patch b/target/linux/generic/backport-4.9/024-4-tcp-tsq-avoid-one-atomic-in-tcp_wfree.patch
index a25cdb5717..87452ac853 100644
--- a/target/linux/generic/backport-4.9/024-4-tcp-tsq-avoid-one-atomic-in-tcp_wfree.patch
+++ b/target/linux/generic/backport-4.9/024-4-tcp-tsq-avoid-one-atomic-in-tcp_wfree.patch
@@ -16,7 +16,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -880,6 +880,7 @@ void tcp_wfree(struct sk_buff *skb)
+@@ -885,6 +885,7 @@ void tcp_wfree(struct sk_buff *skb)
  
  	for (oval = READ_ONCE(tp->tsq_flags);; oval = nval) {
  		struct tsq_tasklet *tsq;
@@ -24,7 +24,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  
  		if (!(oval & TSQF_THROTTLED) || (oval & TSQF_QUEUED))
  			goto out;
-@@ -892,8 +893,10 @@ void tcp_wfree(struct sk_buff *skb)
+@@ -897,8 +898,10 @@ void tcp_wfree(struct sk_buff *skb)
  		/* queue this socket to tasklet queue */
  		local_irq_save(flags);
  		tsq = this_cpu_ptr(&tsq_tasklet);
diff --git a/target/linux/generic/backport-4.9/024-5-tcp-tsq-add-a-shortcut-in-tcp_small_queue_check.patch b/target/linux/generic/backport-4.9/024-5-tcp-tsq-add-a-shortcut-in-tcp_small_queue_check.patch
index 65013b6aa7..d04e365f98 100644
--- a/target/linux/generic/backport-4.9/024-5-tcp-tsq-add-a-shortcut-in-tcp_small_queue_check.patch
+++ b/target/linux/generic/backport-4.9/024-5-tcp-tsq-add-a-shortcut-in-tcp_small_queue_check.patch
@@ -19,7 +19,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -2115,6 +2115,15 @@ static bool tcp_small_queue_check(struct
+@@ -2127,6 +2127,15 @@ static bool tcp_small_queue_check(struct
  	limit <<= factor;
  
  	if (atomic_read(&sk->sk_wmem_alloc) > limit) {
diff --git a/target/linux/generic/backport-4.9/024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch b/target/linux/generic/backport-4.9/024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch
index 6f2d196687..2a6cd40c8a 100644
--- a/target/linux/generic/backport-4.9/024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch
+++ b/target/linux/generic/backport-4.9/024-6-tcp-tcp_mtu_probe-is-likely-to-exit-early.patch
@@ -17,7 +17,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -1948,26 +1948,26 @@ static bool tcp_can_coalesce_send_queue_
+@@ -1960,26 +1960,26 @@ static bool tcp_can_coalesce_send_queue_
   */
  static int tcp_mtu_probe(struct sock *sk)
  {
diff --git a/target/linux/generic/backport-4.9/024-8-tcp-tsq-move-tsq_flags-close-to-sk_wmem_alloc.patch b/target/linux/generic/backport-4.9/024-8-tcp-tsq-move-tsq_flags-close-to-sk_wmem_alloc.patch
index 292b381f8d..0a5b9ead9d 100644
--- a/target/linux/generic/backport-4.9/024-8-tcp-tsq-move-tsq_flags-close-to-sk_wmem_alloc.patch
+++ b/target/linux/generic/backport-4.9/024-8-tcp-tsq-move-tsq_flags-close-to-sk_wmem_alloc.patch
@@ -58,7 +58,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  			goto out;
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -767,14 +767,15 @@ static void tcp_tasklet_func(unsigned lo
+@@ -772,14 +772,15 @@ static void tcp_tasklet_func(unsigned lo
  	list_for_each_safe(q, n, &list) {
  		tp = list_entry(q, struct tcp_sock, tsq_node);
  		list_del(&tp->tsq_node);
@@ -77,7 +77,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  				tcp_tsq_handler(sk);
  			}
  			bh_unlock_sock(sk);
-@@ -797,16 +798,15 @@ static void tcp_tasklet_func(unsigned lo
+@@ -802,16 +803,15 @@ static void tcp_tasklet_func(unsigned lo
   */
  void tcp_release_cb(struct sock *sk)
  {
@@ -96,7 +96,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  
  	if (flags & TCPF_TSQ_DEFERRED)
  		tcp_tsq_handler(sk);
-@@ -878,7 +878,7 @@ void tcp_wfree(struct sk_buff *skb)
+@@ -883,7 +883,7 @@ void tcp_wfree(struct sk_buff *skb)
  	if (wmem >= SKB_TRUESIZE(1) && this_cpu_ksoftirqd() == current)
  		goto out;
  
@@ -105,7 +105,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		struct tsq_tasklet *tsq;
  		bool empty;
  
-@@ -886,7 +886,7 @@ void tcp_wfree(struct sk_buff *skb)
+@@ -891,7 +891,7 @@ void tcp_wfree(struct sk_buff *skb)
  			goto out;
  
  		nval = (oval & ~TSQF_THROTTLED) | TSQF_QUEUED | TCPF_TSQ_DEFERRED;
@@ -114,7 +114,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		if (nval != oval)
  			continue;
  
-@@ -2124,7 +2124,7 @@ static bool tcp_small_queue_check(struct
+@@ -2136,7 +2136,7 @@ static bool tcp_small_queue_check(struct
  		    skb->prev == sk->sk_write_queue.next)
  			return false;
  
@@ -123,7 +123,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		/* It is possible TX completion already happened
  		 * before we set TSQ_THROTTLED, so we must
  		 * test again the condition.
-@@ -2222,8 +2222,8 @@ static bool tcp_write_xmit(struct sock *
+@@ -2234,8 +2234,8 @@ static bool tcp_write_xmit(struct sock *
  		    unlikely(tso_fragment(sk, skb, limit, mss_now, gfp)))
  			break;
  
@@ -134,7 +134,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  		if (tcp_small_queue_check(sk, skb, 0))
  			break;
  
-@@ -3534,8 +3534,6 @@ void tcp_send_ack(struct sock *sk)
+@@ -3546,8 +3546,6 @@ void __tcp_send_ack(struct sock *sk, u32
  	/* We do not want pure acks influencing TCP Small Queues or fq/pacing
  	 * too much.
  	 * SKB_TRUESIZE(max(1 .. 66, MAX_TCP_HEADER)) is unfortunately ~784
diff --git a/target/linux/generic/backport-4.9/024-9-tcp-add-a-missing-barrier-in-tcp_tasklet_func.patch b/target/linux/generic/backport-4.9/024-9-tcp-add-a-missing-barrier-in-tcp_tasklet_func.patch
index d2b8de6a04..bd74303266 100644
--- a/target/linux/generic/backport-4.9/024-9-tcp-add-a-missing-barrier-in-tcp_tasklet_func.patch
+++ b/target/linux/generic/backport-4.9/024-9-tcp-add-a-missing-barrier-in-tcp_tasklet_func.patch
@@ -30,7 +30,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
 
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -769,6 +769,7 @@ static void tcp_tasklet_func(unsigned lo
+@@ -774,6 +774,7 @@ static void tcp_tasklet_func(unsigned lo
  		list_del(&tp->tsq_node);
  
  		sk = (struct sock *)tp;
diff --git a/target/linux/generic/backport-4.9/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch b/target/linux/generic/backport-4.9/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch
index 33593194d5..be3140bb9c 100644
--- a/target/linux/generic/backport-4.9/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch
+++ b/target/linux/generic/backport-4.9/025-tcp-allow-drivers-to-tweak-TSQ-logic.patch
@@ -65,7 +65,7 @@ Cc: Kir Kolyshkin <kir@openvz.org>
  	 * Before updating sk_refcnt, we must commit prior changes to memory
 --- a/net/ipv4/tcp_output.c
 +++ b/net/ipv4/tcp_output.c
-@@ -1581,7 +1581,7 @@ u32 tcp_tso_autosize(const struct sock *
+@@ -1593,7 +1593,7 @@ u32 tcp_tso_autosize(const struct sock *
  {
  	u32 bytes, segs;
  
@@ -74,7 +74,7 @@ Cc: Kir Kolyshkin <kir@openvz.org>
  		    sk->sk_gso_max_size - 1 - MAX_TCP_HEADER);
  
  	/* Goal is to send at least one packet per ms,
-@@ -2111,7 +2111,7 @@ static bool tcp_small_queue_check(struct
+@@ -2123,7 +2123,7 @@ static bool tcp_small_queue_check(struct
  {
  	unsigned int limit;
  
diff --git a/target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch b/target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch
index 84714ce1e1..7a971169bc 100644
--- a/target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch
+++ b/target/linux/generic/backport-4.9/040-mm-add-support-for-releasing-multiple-instances-of-a.patch
@@ -52,7 +52,7 @@ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  extern void __free_page_frag(void *addr);
 --- a/mm/page_alloc.c
 +++ b/mm/page_alloc.c
-@@ -3946,6 +3946,20 @@ static struct page *__page_frag_refill(s
+@@ -3945,6 +3945,20 @@ static struct page *__page_frag_refill(s
  	return page;
  }
  
diff --git a/target/linux/generic/backport-4.9/041-mm-rename-__alloc_page_frag-to-page_frag_alloc-and-_.patch b/target/linux/generic/backport-4.9/041-mm-rename-__alloc_page_frag-to-page_frag_alloc-and-_.patch
index 896ba415fe..fbd3316016 100644
--- a/target/linux/generic/backport-4.9/041-mm-rename-__alloc_page_frag-to-page_frag_alloc-and-_.patch
+++ b/target/linux/generic/backport-4.9/041-mm-rename-__alloc_page_frag-to-page_frag_alloc-and-_.patch
@@ -63,7 +63,7 @@ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  void *napi_alloc_frag(unsigned int fragsz);
 --- a/mm/page_alloc.c
 +++ b/mm/page_alloc.c
-@@ -3960,8 +3960,8 @@ void __page_frag_drain(struct page *page
+@@ -3959,8 +3959,8 @@ void __page_frag_drain(struct page *page
  }
  EXPORT_SYMBOL(__page_frag_drain);
  
@@ -74,7 +74,7 @@ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  {
  	unsigned int size = PAGE_SIZE;
  	struct page *page;
-@@ -4012,19 +4012,19 @@ refill:
+@@ -4011,19 +4011,19 @@ refill:
  
  	return nc->va + offset;
  }
diff --git a/target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch b/target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch
index 117b01d504..64fdc7606c 100644
--- a/target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch
+++ b/target/linux/generic/backport-4.9/042-mm-rename-__page_frag-functions-to-__page_frag_cache.patch
@@ -33,7 +33,7 @@ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  extern void page_frag_free(void *addr);
 --- a/mm/page_alloc.c
 +++ b/mm/page_alloc.c
-@@ -3925,8 +3925,8 @@ EXPORT_SYMBOL(free_pages);
+@@ -3924,8 +3924,8 @@ EXPORT_SYMBOL(free_pages);
   * drivers to provide a backing region of memory for use as either an
   * sk_buff->head, or to be used in the "frags" portion of skb_shared_info.
   */
@@ -44,7 +44,7 @@ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  {
  	struct page *page = NULL;
  	gfp_t gfp = gfp_mask;
-@@ -3946,19 +3946,20 @@ static struct page *__page_frag_refill(s
+@@ -3945,19 +3945,20 @@ static struct page *__page_frag_refill(s
  	return page;
  }
  
@@ -68,7 +68,7 @@ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  
  void *page_frag_alloc(struct page_frag_cache *nc,
  		      unsigned int fragsz, gfp_t gfp_mask)
-@@ -3969,7 +3970,7 @@ void *page_frag_alloc(struct page_frag_c
+@@ -3968,7 +3969,7 @@ void *page_frag_alloc(struct page_frag_c
  
  	if (unlikely(!nc->va)) {
  refill:
diff --git a/target/linux/generic/backport-4.9/090-net-generalize-napi_complete_done.patch b/target/linux/generic/backport-4.9/090-net-generalize-napi_complete_done.patch
index 5c0388ed0f..00f9339abe 100644
--- a/target/linux/generic/backport-4.9/090-net-generalize-napi_complete_done.patch
+++ b/target/linux/generic/backport-4.9/090-net-generalize-napi_complete_done.patch
@@ -214,14 +214,14 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  				   RCANFD_RFCC_RFIE);
 --- a/drivers/net/can/xilinx_can.c
 +++ b/drivers/net/can/xilinx_can.c
-@@ -726,7 +726,7 @@ static int xcan_rx_poll(struct napi_stru
- 		can_led_event(ndev, CAN_LED_EVENT_RX);
+@@ -838,7 +838,7 @@ static int xcan_rx_poll(struct napi_stru
+ 	}
  
  	if (work_done < quota) {
 -		napi_complete(napi);
 +		napi_complete_done(napi, work_done);
  		ier = priv->read_reg(priv, XCAN_IER_OFFSET);
- 		ier |= (XCAN_IXR_RXOK_MASK | XCAN_IXR_RXNEMP_MASK);
+ 		ier |= XCAN_IXR_RXNEMP_MASK;
  		priv->write_reg(priv, XCAN_IER_OFFSET, ier);
 --- a/drivers/net/ethernet/3com/typhoon.c
 +++ b/drivers/net/ethernet/3com/typhoon.c
@@ -1117,7 +1117,7 @@ Signed-off-by: David S. Miller <davem@davemloft.net>
  	return work_done;
 --- a/drivers/net/ethernet/sun/sungem.c
 +++ b/drivers/net/ethernet/sun/sungem.c
-@@ -922,7 +922,7 @@ static int gem_poll(struct napi_struct *
+@@ -924,7 +924,7 @@ static int gem_poll(struct napi_struct *
  		gp->status = readl(gp->regs + GREG_STAT);
  	} while (gp->status & GREG_STAT_NAPI);
  
diff --git a/target/linux/generic/backport-4.9/500-ext4-fix-check-to-prevent-initializing-reserved-inod.patch b/target/linux/generic/backport-4.9/500-ext4-fix-check-to-prevent-initializing-reserved-inod.patch
new file mode 100644
index 0000000000..bcb42d638a
--- /dev/null
+++ b/target/linux/generic/backport-4.9/500-ext4-fix-check-to-prevent-initializing-reserved-inod.patch
@@ -0,0 +1,65 @@
+From 5012284700775a4e6e3fbe7eac4c543c4874b559 Mon Sep 17 00:00:00 2001
+From: Theodore Ts'o <tytso@mit.edu>
+Date: Sat, 28 Jul 2018 08:12:04 -0400
+Subject: [PATCH] ext4: fix check to prevent initializing reserved inodes
+
+Commit 8844618d8aa7: "ext4: only look at the bg_flags field if it is
+valid" will complain if block group zero does not have the
+EXT4_BG_INODE_ZEROED flag set.  Unfortunately, this is not correct,
+since a freshly created file system has this flag cleared.  It gets
+almost immediately after the file system is mounted read-write --- but
+the following somewhat unlikely sequence will end up triggering a
+false positive report of a corrupted file system:
+
+   mkfs.ext4 /dev/vdc
+   mount -o ro /dev/vdc /vdc
+   mount -o remount,rw /dev/vdc
+
+Instead, when initializing the inode table for block group zero, test
+to make sure that itable_unused count is not too large, since that is
+the case that will result in some or all of the reserved inodes
+getting cleared.
+
+This fixes the failures reported by Eric Whiteney when running
+generic/230 and generic/231 in the the nojournal test case.
+
+Fixes: 8844618d8aa7 ("ext4: only look at the bg_flags field if it is valid")
+Reported-by: Eric Whitney <enwlinux@gmail.com>
+Signed-off-by: Theodore Ts'o <tytso@mit.edu>
+---
+ fs/ext4/ialloc.c | 5 ++++-
+ fs/ext4/super.c  | 8 +-------
+ 2 files changed, 5 insertions(+), 8 deletions(-)
+
+--- a/fs/ext4/ialloc.c
++++ b/fs/ext4/ialloc.c
+@@ -1313,7 +1313,10 @@ int ext4_init_inode_table(struct super_b
+ 			    ext4_itable_unused_count(sb, gdp)),
+ 			    sbi->s_inodes_per_block);
+ 
+-	if ((used_blks < 0) || (used_blks > sbi->s_itb_per_group)) {
++	if ((used_blks < 0) || (used_blks > sbi->s_itb_per_group) ||
++	    ((group == 0) && ((EXT4_INODES_PER_GROUP(sb) -
++			       ext4_itable_unused_count(sb, gdp)) <
++			      EXT4_FIRST_INO(sb)))) {
+ 		ext4_error(sb, "Something is wrong with group %u: "
+ 			   "used itable blocks: %d; "
+ 			   "itable unused count: %u",
+--- a/fs/ext4/super.c
++++ b/fs/ext4/super.c
+@@ -3031,14 +3031,8 @@ static ext4_group_t ext4_has_uninit_itab
+ 		if (!gdp)
+ 			continue;
+ 
+-		if (gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))
+-			continue;
+-		if (group != 0)
++		if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED)))
+ 			break;
+-		ext4_error(sb, "Inode table for bg 0 marked as "
+-			   "needing zeroing");
+-		if (sb->s_flags & MS_RDONLY)
+-			return ngroups;
+ 	}
+ 
+ 	return group;