Merge tag 'flexible-array-member-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux

Pull flex-array reverts from Gustavo Silva:
 "This reverts flexible array changes in include/uapi/

  These structures can get embedded in other structures in user-space
  and cause all sorts of warnings and problems[1]. So, we better don't
  take any chances and keep the zero-length arrays in place for now"

[1] https://lore.kernel.org/lkml/20200424121553.GE26002@ziepe.ca/

* tag 'flexible-array-member-5.7-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
  uapi: revert flexible-array conversions

8 files changed, 12 insertions, 12 deletions

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 7bbf1b65be10..f9b7fdd951e4 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -73,7 +73,7 @@ struct bpf_insn {
 /* Key of an a BPF_MAP_TYPE_LPM_TRIE entry */
 struct bpf_lpm_trie_key {
 	__u32	prefixlen;	/* up to 32 for AF_INET, 128 for AF_INET6 */
-	__u8	data[];	/* Arbitrary size */
+	__u8	data[0];	/* Arbitrary size */
 };
 
 struct bpf_cgroup_storage_key {
diff --git a/include/uapi/linux/dlm_device.h b/include/uapi/linux/dlm_device.h
index e83954c69fff..f880d2831160 100644
--- a/include/uapi/linux/dlm_device.h
+++ b/include/uapi/linux/dlm_device.h
@@ -45,13 +45,13 @@ struct dlm_lock_params {
 	void __user *bastaddr;
 	struct dlm_lksb __user *lksb;
 	char lvb[DLM_USER_LVB_LEN];
-	char name[];
+	char name[0];
 };
 
 struct dlm_lspace_params {
 	__u32 flags;
 	__u32 minor;
-	char name[];
+	char name[0];
 };
 
 struct dlm_purge_params {
diff --git a/include/uapi/linux/fiemap.h b/include/uapi/linux/fiemap.h
index 7a900b2377b6..8c0bc24d5d95 100644
--- a/include/uapi/linux/fiemap.h
+++ b/include/uapi/linux/fiemap.h
@@ -34,7 +34,7 @@ struct fiemap {
 	__u32 fm_mapped_extents;/* number of extents that were mapped (out) */
 	__u32 fm_extent_count;  /* size of fm_extents array (in) */
 	__u32 fm_reserved;
-	struct fiemap_extent fm_extents[]; /* array of mapped extents (out) */
+	struct fiemap_extent fm_extents[0]; /* array of mapped extents (out) */
 };
 
 #define FIEMAP_MAX_OFFSET	(~0ULL)
diff --git a/include/uapi/linux/if_arcnet.h b/include/uapi/linux/if_arcnet.h
index b122cfac7128..683878036d76 100644
--- a/include/uapi/linux/if_arcnet.h
+++ b/include/uapi/linux/if_arcnet.h
@@ -60,7 +60,7 @@ struct arc_rfc1201 {
 	__u8  proto;		/* protocol ID field - varies		*/
 	__u8  split_flag;	/* for use with split packets		*/
 	__be16   sequence;	/* sequence number			*/
-	__u8  payload[];	/* space remaining in packet (504 bytes)*/
+	__u8  payload[0];	/* space remaining in packet (504 bytes)*/
 };
 #define RFC1201_HDR_SIZE 4
 
@@ -69,7 +69,7 @@ struct arc_rfc1201 {
  */
 struct arc_rfc1051 {
 	__u8 proto;		/* ARC_P_RFC1051_ARP/RFC1051_IP	*/
-	__u8 payload[];	/* 507 bytes			*/
+	__u8 payload[0];	/* 507 bytes			*/
 };
 #define RFC1051_HDR_SIZE 1
 
@@ -80,7 +80,7 @@ struct arc_rfc1051 {
 struct arc_eth_encap {
 	__u8 proto;		/* Always ARC_P_ETHER			*/
 	struct ethhdr eth;	/* standard ethernet header (yuck!)	*/
-	__u8 payload[];	/* 493 bytes				*/
+	__u8 payload[0];	/* 493 bytes				*/
 };
 #define ETH_ENCAP_HDR_SIZE 14
 
diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h
index 98e29e7f54ac..00c08120f3ba 100644
--- a/include/uapi/linux/mmc/ioctl.h
+++ b/include/uapi/linux/mmc/ioctl.h
@@ -57,7 +57,7 @@ struct mmc_ioc_cmd {
  */
 struct mmc_ioc_multi_cmd {
 	__u64 num_of_cmds;
-	struct mmc_ioc_cmd cmds[];
+	struct mmc_ioc_cmd cmds[0];
 };
 
 #define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
diff --git a/include/uapi/linux/net_dropmon.h b/include/uapi/linux/net_dropmon.h
index 67e31f329190..66048cc5d7b3 100644
--- a/include/uapi/linux/net_dropmon.h
+++ b/include/uapi/linux/net_dropmon.h
@@ -29,12 +29,12 @@ struct net_dm_config_entry {
 
 struct net_dm_config_msg {
 	__u32 entries;
-	struct net_dm_config_entry options[];
+	struct net_dm_config_entry options[0];
 };
 
 struct net_dm_alert_msg {
 	__u32 entries;
-	struct net_dm_drop_point points[];
+	struct net_dm_drop_point points[0];
 };
 
 struct net_dm_user_msg {
diff --git a/include/uapi/linux/netfilter_bridge/ebt_among.h b/include/uapi/linux/netfilter_bridge/ebt_among.h
index 73b26a280c4f..9acf757bc1f7 100644
--- a/include/uapi/linux/netfilter_bridge/ebt_among.h
+++ b/include/uapi/linux/netfilter_bridge/ebt_among.h
@@ -40,7 +40,7 @@ struct ebt_mac_wormhash_tuple {
 struct ebt_mac_wormhash {
 	int table[257];
 	int poolsize;
-	struct ebt_mac_wormhash_tuple pool[];
+	struct ebt_mac_wormhash_tuple pool[0];
 };
 
 #define ebt_mac_wormhash_size(x) ((x) ? sizeof(struct ebt_mac_wormhash) \
diff --git a/include/uapi/scsi/scsi_bsg_fc.h b/include/uapi/scsi/scsi_bsg_fc.h
index 7f5930801f72..3ae65e93235c 100644
--- a/include/uapi/scsi/scsi_bsg_fc.h
+++ b/include/uapi/scsi/scsi_bsg_fc.h
@@ -209,7 +209,7 @@ struct fc_bsg_host_vendor {
 	__u64 vendor_id;
 
 	/* start of vendor command area */
-	__u32 vendor_cmd[];
+	__u32 vendor_cmd[0];
 };
 
 /* Response: