Merge tag 'v5.1-rc5' into for-5.2/block

Pull in v5.1-rc5 to resolve two conflicts. One is in BFQ, in just
a comment, and is trivial. The other one is a conflict due to a
later fix in the bio multi-page work, and needs a bit more care.

* tag 'v5.1-rc5': (476 commits)
  Linux 5.1-rc5
  fs: prevent page refcount overflow in pipe_buf_get
  mm: prevent get_user_pages() from overflowing page refcount
  mm: add 'try_get_page()' helper function
  mm: make page ref count overflow check tighter and more explicit
  clk: imx: Fix PLL_1416X not rounding rates
  clk: mediatek: fix clk-gate flag setting
  arm64: futex: Fix FUTEX_WAKE_OP atomic ops with non-zero result value
  iommu/amd: Set exclusion range correctly
  clang-format: Update with the latest for_each macro list
  perf/core: Fix perf_event_disable_inatomic() race
  block: fix the return errno for direct IO
  Revert "SUNRPC: Micro-optimise when the task is known not to be sleeping"
  NFSv4.1 fix incorrect return value in copy_file_range
  xprtrdma: Fix helper that drains the transport
  NFS: Fix handling of reply page vector
  NFS: Forbid setting AF_INET6 to "struct sockaddr_in"->sin_family.
  dma-debug: only skip one stackframe entry
  platform/x86: pmc_atom: Drop __initconst on dmi table
  nvmet: fix discover log page when offsets are used
  ...

Signed-off-by: Jens Axboe <axboe@kernel.dk>

18 files changed, 102 insertions, 59 deletions

diff --git a/include/linux/bio.h b/include/linux/bio.h
index bb915591557b..9577ad8f6e28 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -120,19 +120,23 @@ static inline bool bio_full(struct bio *bio)
 	return bio->bi_vcnt >= bio->bi_max_vecs;
 }
 
-#define mp_bvec_for_each_segment(bv, bvl, i, iter_all)			\
-	for (bv = bvec_init_iter_all(&iter_all);			\
-		(iter_all.done < (bvl)->bv_len) &&			\
-		(mp_bvec_next_segment((bvl), &iter_all), 1);		\
-		iter_all.done += bv->bv_len, i += 1)
+static inline bool bio_next_segment(const struct bio *bio,
+				    struct bvec_iter_all *iter)
+{
+	if (iter->idx >= bio->bi_vcnt)
+		return false;
+
+	bvec_advance(&bio->bi_io_vec[iter->idx], iter);
+	return true;
+}
 
 /*
  * drivers should _never_ use the all version - the bio may have been split
  * before it got to the driver and the driver won't own all of it
  */
-#define bio_for_each_segment_all(bvl, bio, i, iter_all)		\
-	for (i = 0, iter_all.idx = 0; iter_all.idx < (bio)->bi_vcnt; iter_all.idx++)	\
-		mp_bvec_for_each_segment(bvl, &((bio)->bi_io_vec[iter_all.idx]), i, iter_all)
+#define bio_for_each_segment_all(bvl, bio, i, iter)			\
+	for (i = 0, bvl = bvec_init_iter_all(&iter);			\
+	     bio_next_segment((bio), &iter); i++)
 
 static inline void bio_advance_iter(struct bio *bio, struct bvec_iter *iter,
 				    unsigned bytes)
diff --git a/include/linux/bitrev.h b/include/linux/bitrev.h
index 50fb0dee23e8..d35b8ec1c485 100644
--- a/include/linux/bitrev.h
+++ b/include/linux/bitrev.h
@@ -34,41 +34,41 @@ static inline u32 __bitrev32(u32 x)
 
 #define __constant_bitrev32(x)	\
 ({					\
-	u32 __x = x;			\
-	__x = (__x >> 16) | (__x << 16);	\
-	__x = ((__x & (u32)0xFF00FF00UL) >> 8) | ((__x & (u32)0x00FF00FFUL) << 8);	\
-	__x = ((__x & (u32)0xF0F0F0F0UL) >> 4) | ((__x & (u32)0x0F0F0F0FUL) << 4);	\
-	__x = ((__x & (u32)0xCCCCCCCCUL) >> 2) | ((__x & (u32)0x33333333UL) << 2);	\
-	__x = ((__x & (u32)0xAAAAAAAAUL) >> 1) | ((__x & (u32)0x55555555UL) << 1);	\
-	__x;								\
+	u32 ___x = x;			\
+	___x = (___x >> 16) | (___x << 16);	\
+	___x = ((___x & (u32)0xFF00FF00UL) >> 8) | ((___x & (u32)0x00FF00FFUL) << 8);	\
+	___x = ((___x & (u32)0xF0F0F0F0UL) >> 4) | ((___x & (u32)0x0F0F0F0FUL) << 4);	\
+	___x = ((___x & (u32)0xCCCCCCCCUL) >> 2) | ((___x & (u32)0x33333333UL) << 2);	\
+	___x = ((___x & (u32)0xAAAAAAAAUL) >> 1) | ((___x & (u32)0x55555555UL) << 1);	\
+	___x;								\
 })
 
 #define __constant_bitrev16(x)	\
 ({					\
-	u16 __x = x;			\
-	__x = (__x >> 8) | (__x << 8);	\
-	__x = ((__x & (u16)0xF0F0U) >> 4) | ((__x & (u16)0x0F0FU) << 4);	\
-	__x = ((__x & (u16)0xCCCCU) >> 2) | ((__x & (u16)0x3333U) << 2);	\
-	__x = ((__x & (u16)0xAAAAU) >> 1) | ((__x & (u16)0x5555U) << 1);	\
-	__x;								\
+	u16 ___x = x;			\
+	___x = (___x >> 8) | (___x << 8);	\
+	___x = ((___x & (u16)0xF0F0U) >> 4) | ((___x & (u16)0x0F0FU) << 4);	\
+	___x = ((___x & (u16)0xCCCCU) >> 2) | ((___x & (u16)0x3333U) << 2);	\
+	___x = ((___x & (u16)0xAAAAU) >> 1) | ((___x & (u16)0x5555U) << 1);	\
+	___x;								\
 })
 
 #define __constant_bitrev8x4(x) \
 ({			\
-	u32 __x = x;	\
-	__x = ((__x & (u32)0xF0F0F0F0UL) >> 4) | ((__x & (u32)0x0F0F0F0FUL) << 4);	\
-	__x = ((__x & (u32)0xCCCCCCCCUL) >> 2) | ((__x & (u32)0x33333333UL) << 2);	\
-	__x = ((__x & (u32)0xAAAAAAAAUL) >> 1) | ((__x & (u32)0x55555555UL) << 1);	\
-	__x;								\
+	u32 ___x = x;	\
+	___x = ((___x & (u32)0xF0F0F0F0UL) >> 4) | ((___x & (u32)0x0F0F0F0FUL) << 4);	\
+	___x = ((___x & (u32)0xCCCCCCCCUL) >> 2) | ((___x & (u32)0x33333333UL) << 2);	\
+	___x = ((___x & (u32)0xAAAAAAAAUL) >> 1) | ((___x & (u32)0x55555555UL) << 1);	\
+	___x;								\
 })
 
 #define __constant_bitrev8(x)	\
 ({					\
-	u8 __x = x;			\
-	__x = (__x >> 4) | (__x << 4);	\
-	__x = ((__x & (u8)0xCCU) >> 2) | ((__x & (u8)0x33U) << 2);	\
-	__x = ((__x & (u8)0xAAU) >> 1) | ((__x & (u8)0x55U) << 1);	\
-	__x;								\
+	u8 ___x = x;			\
+	___x = (___x >> 4) | (___x << 4);	\
+	___x = ((___x & (u8)0xCCU) >> 2) | ((___x & (u8)0x33U) << 2);	\
+	___x = ((___x & (u8)0xAAU) >> 1) | ((___x & (u8)0x55U) << 1);	\
+	___x;								\
 })
 
 #define bitrev32(x) \
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index cb2aa7ecafff..db29928de467 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -302,6 +302,7 @@ void blk_mq_requeue_request(struct request *rq, bool kick_requeue_list);
 void blk_mq_kick_requeue_list(struct request_queue *q);
 void blk_mq_delay_kick_requeue_list(struct request_queue *q, unsigned long msecs);
 bool blk_mq_complete_request(struct request *rq);
+void blk_mq_complete_request_sync(struct request *rq);
 bool blk_mq_bio_list_merge(struct request_queue *q, struct list_head *list,
 			   struct bio *bio);
 bool blk_mq_queue_stopped(struct request_queue *q);
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index 44b0f4684190..3368e5bb73cf 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -140,18 +140,18 @@ static inline bool bvec_iter_advance(const struct bio_vec *bv,
 
 static inline struct bio_vec *bvec_init_iter_all(struct bvec_iter_all *iter_all)
 {
-	iter_all->bv.bv_page = NULL;
 	iter_all->done = 0;
+	iter_all->idx = 0;
 
 	return &iter_all->bv;
 }
 
-static inline void mp_bvec_next_segment(const struct bio_vec *bvec,
-					struct bvec_iter_all *iter_all)
+static inline void bvec_advance(const struct bio_vec *bvec,
+				struct bvec_iter_all *iter_all)
 {
 	struct bio_vec *bv = &iter_all->bv;
 
-	if (bv->bv_page) {
+	if (iter_all->done) {
 		bv->bv_page++;
 		bv->bv_offset = 0;
 	} else {
@@ -160,6 +160,12 @@ static inline void mp_bvec_next_segment(const struct bio_vec *bvec,
 	}
 	bv->bv_len = min_t(unsigned int, PAGE_SIZE - bv->bv_offset,
 			   bvec->bv_len - iter_all->done);
+	iter_all->done += bv->bv_len;
+
+	if (iter_all->done == bvec->bv_len) {
+		iter_all->idx++;
+		iter_all->done = 0;
+	}
 }
 
 /*
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8b42df09b04c..dd28e7679089 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -158,6 +158,9 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
 #define FMODE_OPENED		((__force fmode_t)0x80000)
 #define FMODE_CREATED		((__force fmode_t)0x100000)
 
+/* File is stream-like */
+#define FMODE_STREAM		((__force fmode_t)0x200000)
+
 /* File was opened by fanotify and shouldn't generate fanotify events */
 #define FMODE_NONOTIFY		((__force fmode_t)0x4000000)
 
@@ -3074,6 +3077,7 @@ extern loff_t no_seek_end_llseek_size(struct file *, loff_t, int, loff_t);
 extern loff_t no_seek_end_llseek(struct file *, loff_t, int);
 extern int generic_file_open(struct inode * inode, struct file * filp);
 extern int nonseekable_open(struct inode * inode, struct file * filp);
+extern int stream_open(struct inode * inode, struct file * filp);
 
 #ifdef CONFIG_BLOCK
 typedef void (dio_submit_t)(struct bio *bio, struct inode *inode,
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 24ef5a018a5e..a3b59d143afb 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -48,8 +48,8 @@
 
 #define u64_to_user_ptr(x) (		\
 {					\
-	typecheck(u64, x);		\
-	(void __user *)(uintptr_t)x;	\
+	typecheck(u64, (x));		\
+	(void __user *)(uintptr_t)(x);	\
 }					\
 )
 
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index 1f3d880b7ca1..dbb6118370c1 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -566,7 +566,10 @@ struct mem_cgroup *lock_page_memcg(struct page *page);
 void __unlock_page_memcg(struct mem_cgroup *memcg);
 void unlock_page_memcg(struct page *page);
 
-/* idx can be of type enum memcg_stat_item or node_stat_item */
+/*
+ * idx can be of type enum memcg_stat_item or node_stat_item.
+ * Keep in sync with memcg_exact_page_state().
+ */
 static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
 					     int idx)
 {
diff --git a/include/linux/mii.h b/include/linux/mii.h
index 6fee8b1a4400..5cd824c1c0ca 100644
--- a/include/linux/mii.h
+++ b/include/linux/mii.h
@@ -469,7 +469,7 @@ static inline u32 linkmode_adv_to_lcl_adv_t(unsigned long *advertising)
 	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
 			      advertising))
 		lcl_adv |= ADVERTISE_PAUSE_CAP;
-	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
 			      advertising))
 		lcl_adv |= ADVERTISE_PAUSE_ASYM;
 
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index 022541dc5dbf..0d0729648844 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -594,6 +594,8 @@ enum mlx5_pagefault_type_flags {
 };
 
 struct mlx5_td {
+	/* protects tirs list changes while tirs refresh */
+	struct mutex     list_lock;
 	struct list_head tirs_list;
 	u32              tdn;
 };
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 76769749b5a5..6b10c21630f5 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -966,6 +966,10 @@ static inline bool is_pci_p2pdma_page(const struct page *page)
 }
 #endif /* CONFIG_DEV_PAGEMAP_OPS */
 
+/* 127: arbitrary random number, small enough to assemble well */
+#define page_ref_zero_or_close_to_overflow(page) \
+	((unsigned int) page_ref_count(page) + 127u <= 127u)
+
 static inline void get_page(struct page *page)
 {
 	page = compound_head(page);
@@ -973,8 +977,17 @@ static inline void get_page(struct page *page)
 	 * Getting a normal page or the head of a compound page
 	 * requires to already have an elevated page->_refcount.
 	 */
-	VM_BUG_ON_PAGE(page_ref_count(page) <= 0, page);
+	VM_BUG_ON_PAGE(page_ref_zero_or_close_to_overflow(page), page);
+	page_ref_inc(page);
+}
+
+static inline __must_check bool try_get_page(struct page *page)
+{
+	page = compound_head(page);
+	if (WARN_ON_ONCE(page_ref_count(page) <= 0))
+		return false;
 	page_ref_inc(page);
+	return true;
 }
 
 static inline void put_page(struct page *page)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 7eade9132f02..4ef4bbe78a1d 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -671,7 +671,7 @@ enum vm_fault_reason {
 
 /* Encode hstate index for a hwpoisoned large page */
 #define VM_FAULT_SET_HINDEX(x) ((__force vm_fault_t)((x) << 16))
-#define VM_FAULT_GET_HINDEX(x) (((x) >> 16) & 0xf)
+#define VM_FAULT_GET_HINDEX(x) (((__force unsigned int)(x) >> 16) & 0xf)
 
 #define VM_FAULT_ERROR (VM_FAULT_OOM | VM_FAULT_SIGBUS |	\
 			VM_FAULT_SIGSEGV | VM_FAULT_HWPOISON |	\
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index baa49e6a23cc..c40720cb59ac 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -967,8 +967,13 @@ struct nvme_get_log_page_command {
 	__le16			numdl;
 	__le16			numdu;
 	__u16			rsvd11;
-	__le32			lpol;
-	__le32			lpou;
+	union {
+		struct {
+			__le32 lpol;
+			__le32 lpou;
+		};
+		__le64 lpo;
+	};
 	__u32			rsvd14[2];
 };
 
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index 787d224ff43e..abb2dac3da9b 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -101,18 +101,20 @@ struct pipe_buf_operations {
 	/*
 	 * Get a reference to the pipe buffer.
 	 */
-	void (*get)(struct pipe_inode_info *, struct pipe_buffer *);
+	bool (*get)(struct pipe_inode_info *, struct pipe_buffer *);
 };
 
 /**
  * pipe_buf_get - get a reference to a pipe_buffer
  * @pipe:	the pipe that the buffer belongs to
  * @buf:	the buffer to get a reference to
+ *
+ * Return: %true if the reference was successfully obtained.
  */
-static inline void pipe_buf_get(struct pipe_inode_info *pipe,
+static inline __must_check bool pipe_buf_get(struct pipe_inode_info *pipe,
 				struct pipe_buffer *buf)
 {
-	buf->ops->get(pipe, buf);
+	return buf->ops->get(pipe, buf);
 }
 
 /**
@@ -171,7 +173,7 @@ struct pipe_inode_info *alloc_pipe_info(void);
 void free_pipe_info(struct pipe_inode_info *);
 
 /* Generic pipe buffer ops functions */
-void generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
+bool generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
 int generic_pipe_buf_confirm(struct pipe_inode_info *, struct pipe_buffer *);
 int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
 void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *);
diff --git a/include/linux/platform_data/x86/clk-pmc-atom.h b/include/linux/platform_data/x86/clk-pmc-atom.h
index 3ab892208343..7a37ac27d0fb 100644
--- a/include/linux/platform_data/x86/clk-pmc-atom.h
+++ b/include/linux/platform_data/x86/clk-pmc-atom.h
@@ -35,10 +35,13 @@ struct pmc_clk {
  *
  * @base:	PMC clock register base offset
  * @clks:	pointer to set of registered clocks, typically 0..5
+ * @critical:	flag to indicate if firmware enabled pmc_plt_clks
+ *		should be marked as critial or not
  */
 struct pmc_clk_data {
 	void __iomem *base;
 	const struct pmc_clk *clks;
+	bool critical;
 };
 
 #endif /* __PLATFORM_DATA_X86_CLK_PMC_ATOM_H */
diff --git a/include/linux/ptrace.h b/include/linux/ptrace.h
index edb9b040c94c..d5084ebd9f03 100644
--- a/include/linux/ptrace.h
+++ b/include/linux/ptrace.h
@@ -9,6 +9,13 @@
 #include <linux/bug.h>			/* For BUG_ON.  */
 #include <linux/pid_namespace.h>	/* For task_active_pid_ns.  */
 #include <uapi/linux/ptrace.h>
+#include <linux/seccomp.h>
+
+/* Add sp to seccomp_data, as seccomp is user API, we don't want to modify it */
+struct syscall_info {
+	__u64			sp;
+	struct seccomp_data	data;
+};
 
 extern int ptrace_access_vm(struct task_struct *tsk, unsigned long addr,
 			    void *buf, int len, unsigned int gup_flags);
@@ -407,9 +414,7 @@ static inline void user_single_step_report(struct pt_regs *regs)
 #define current_user_stack_pointer() user_stack_pointer(current_pt_regs())
 #endif
 
-extern int task_current_syscall(struct task_struct *target, long *callno,
-				unsigned long args[6], unsigned int maxargs,
-				unsigned long *sp, unsigned long *pc);
+extern int task_current_syscall(struct task_struct *target, struct syscall_info *info);
 
 extern void sigaction_compat_abi(struct k_sigaction *act, struct k_sigaction *oact);
 #endif
diff --git a/include/linux/string.h b/include/linux/string.h
index 7927b875f80c..6ab0a6fa512e 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -150,6 +150,9 @@ extern void * memscan(void *,int,__kernel_size_t);
 #ifndef __HAVE_ARCH_MEMCMP
 extern int memcmp(const void *,const void *,__kernel_size_t);
 #endif
+#ifndef __HAVE_ARCH_BCMP
+extern int bcmp(const void *,const void *,__kernel_size_t);
+#endif
 #ifndef __HAVE_ARCH_MEMCHR
 extern void * memchr(const void *,int,__kernel_size_t);
 #endif
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index ec861cd0cfe8..52d41d0c1ae1 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -304,12 +304,4 @@ rpc_clnt_swap_deactivate(struct rpc_clnt *clnt)
 }
 #endif /* CONFIG_SUNRPC_SWAP */
 
-static inline bool
-rpc_task_need_resched(const struct rpc_task *task)
-{
-	if (RPC_IS_QUEUED(task) || task->tk_callback)
-		return true;
-	return false;
-}
-
 #endif /* _LINUX_SUNRPC_SCHED_H_ */
diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index fab02133a919..3dc70adfe5f5 100644
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -63,7 +63,7 @@ struct virtqueue;
 /*
  * Creates a virtqueue and allocates the descriptor ring.  If
  * may_reduce_num is set, then this may allocate a smaller ring than
- * expected.  The caller should query virtqueue_get_ring_size to learn
+ * expected.  The caller should query virtqueue_get_vring_size to learn
  * the actual size of the ring.
  */
 struct virtqueue *vring_create_virtqueue(unsigned int index,