Merge branch 'akpm/master'

28 files changed, 95 insertions, 123 deletions

diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
index f3a0649ab521..627416bbd0b1 100644
--- a/arch/score/kernel/setup.c
+++ b/arch/score/kernel/setup.c
@@ -124,9 +124,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 {
 	unsigned long n = (unsigned long) v - 1;
 
-	seq_printf(m, "processor\t\t: %ld\n", n);
-	seq_printf(m, "\n");
-
+	seq_printf(m, "processor\t\t: %ld\n\n", n);
 	return 0;
 }
 
diff --git a/arch/sparc/lib/NG4memset.S b/arch/sparc/lib/NG4memset.S
index f81ee5419e2c..d0c4d195fd40 100644
--- a/arch/sparc/lib/NG4memset.S
+++ b/arch/sparc/lib/NG4memset.S
@@ -14,14 +14,14 @@
 	.globl		NG4memset
 NG4memset:
 	andcc		%o1, 0xff, %o4
-	be,pt		%icc, 1f
+	be,pt		%xcc, 1f
 	 mov		%o2, %o1
 	sllx		%o4, 8, %g1
 	or		%g1, %o4, %o2
 	sllx		%o2, 16, %g1
 	or		%g1, %o2, %o2
 	sllx		%o2, 32, %g1
-	ba,pt		%icc, 1f
+	ba,pt		%xcc, 1f
 	 or		%g1, %o2, %o4
 	.size		NG4memset,.-NG4memset
 
@@ -30,7 +30,7 @@ NG4memset:
 NG4bzero:
 	clr		%o4
 1:	cmp		%o1, 16
-	ble		%icc, .Ltiny
+	ble		%xcc, .Ltiny
 	 mov		%o0, %o3
 	sub		%g0, %o0, %g1
 	and		%g1, 0x7, %g1
@@ -38,7 +38,7 @@ NG4bzero:
 	 sub		%o1, %g1, %o1
 1:	stb		%o4, [%o0 + 0x00]
 	subcc		%g1, 1, %g1
-	bne,pt		%icc, 1b
+	bne,pt		%xcc, 1b
 	 add		%o0, 1, %o0
 .Laligned8:
 	cmp		%o1, 64 + (64 - 8)
@@ -49,7 +49,7 @@ NG4bzero:
 	 sub		%o1, %g1, %o1
 1:	stx		%o4, [%o0 + 0x00]
 	subcc		%g1, 8, %g1
-	bne,pt		%icc, 1b
+	bne,pt		%xcc, 1b
 	 add		%o0, 0x8, %o0
 .Laligned64:
 	andn		%o1, 64 - 1, %g1
@@ -59,30 +59,30 @@ NG4bzero:
 1:	stxa		%o4, [%o0 + %g0] ASI_BLK_INIT_QUAD_LDD_P
 	subcc		%g1, 0x40, %g1
 	stxa		%o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
-	bne,pt		%icc, 1b
+	bne,pt		%xcc, 1b
 	 add		%o0, 0x40, %o0
 .Lpostloop:
 	cmp		%o1, 8
-	bl,pn		%icc, .Ltiny
+	bl,pn		%xcc, .Ltiny
 	 membar		#StoreStore|#StoreLoad
 .Lmedium:
 	andn		%o1, 0x7, %g1
 	sub		%o1, %g1, %o1
 1:	stx		%o4, [%o0 + 0x00]
 	subcc		%g1, 0x8, %g1
-	bne,pt		%icc, 1b
+	bne,pt		%xcc, 1b
 	 add		%o0, 0x08, %o0
 	andcc		%o1, 0x4, %g1
-	be,pt		%icc, .Ltiny
+	be,pt		%xcc, .Ltiny
 	 sub		%o1, %g1, %o1
 	stw		%o4, [%o0 + 0x00]
 	add		%o0, 0x4, %o0
 .Ltiny:
 	cmp		%o1, 0
-	be,pn		%icc, .Lexit
+	be,pn		%xcc, .Lexit
 1:	 subcc		%o1, 1, %o1
 	stb		%o4, [%o0 + 0x00]
-	bne,pt		%icc, 1b
+	bne,pt		%xcc, 1b
 	 add		%o0, 1, %o0
 .Lexit:
 	retl
@@ -100,8 +100,8 @@ NG4bzero:
 	stxa		%o4, [%o0 + %g2] ASI_BLK_INIT_QUAD_LDD_P
 	stxa		%o4, [%o0 + %g3] ASI_BLK_INIT_QUAD_LDD_P
 	stxa		%o4, [%o0 + %o5] ASI_BLK_INIT_QUAD_LDD_P
-	bne,pt		%icc, 1b
+	bne,pt		%xcc, 1b
 	 add		%o0, 0x30, %o0
-	ba,a,pt		%icc, .Lpostloop
+	ba,a,pt		%xcc, .Lpostloop
 	 nop
 	.size		NG4bzero,.-NG4bzero
diff --git a/certs/blacklist_nohashes.c b/certs/blacklist_nohashes.c
index 73fd99098ad7..753b703ef0ef 100644
--- a/certs/blacklist_nohashes.c
+++ b/certs/blacklist_nohashes.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include "blacklist.h"
 
-const char __initdata *const blacklist_hashes[] = {
+const char __initconst *const blacklist_hashes[] = {
 	NULL
 };
diff --git a/drivers/media/platform/sti/delta/delta-ipc.c b/drivers/media/platform/sti/delta/delta-ipc.c
index a4603d573c34..bd1bbbeedec3 100644
--- a/drivers/media/platform/sti/delta/delta-ipc.c
+++ b/drivers/media/platform/sti/delta/delta-ipc.c
@@ -175,8 +175,8 @@ int delta_ipc_open(struct delta_ctx *pctx, const char *name,
 	msg.ipc_buf_size = ipc_buf_size;
 	msg.ipc_buf_paddr = ctx->ipc_buf->paddr;
 
-	memcpy(msg.name, name, sizeof(msg.name));
-	msg.name[sizeof(msg.name) - 1] = 0;
+	memset(msg.name, 0, sizeof(msg.name));
+	strcpy(msg.name, name);
 
 	msg.param_size = param->size;
 	memcpy(ctx->ipc_buf->vaddr, param->data, msg.param_size);
diff --git a/fs/inode.c b/fs/inode.c
index e2ca0f4b5151..ef362364d396 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -498,7 +498,6 @@ EXPORT_SYMBOL(__remove_inode_hash);
 
 void clear_inode(struct inode *inode)
 {
-	might_sleep();
 	/*
 	 * We have to cycle tree_lock here because reclaim can be still in the
 	 * process of removing the last page (in __delete_from_page_cache())
diff --git a/fs/pipe.c b/fs/pipe.c
index a449ca0ec0c6..0913aed7fd0d 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -35,11 +35,6 @@
  */
 unsigned int pipe_max_size = 1048576;
 
-/*
- * Minimum pipe size, as required by POSIX
- */
-unsigned int pipe_min_size = PAGE_SIZE;
-
 /* Maximum allocatable pages per user. Hard limit is unset by default, soft
  * matches default values.
  */
@@ -610,12 +605,21 @@ static unsigned long account_pipe_buffers(struct user_struct *user,
 
 static bool too_many_pipe_buffers_soft(unsigned long user_bufs)
 {
-	return pipe_user_pages_soft && user_bufs >= pipe_user_pages_soft;
+	unsigned long soft_limit = READ_ONCE(pipe_user_pages_soft);
+
+	return soft_limit && user_bufs > soft_limit;
 }
 
 static bool too_many_pipe_buffers_hard(unsigned long user_bufs)
 {
-	return pipe_user_pages_hard && user_bufs >= pipe_user_pages_hard;
+	unsigned long hard_limit = READ_ONCE(pipe_user_pages_hard);
+
+	return hard_limit && user_bufs > hard_limit;
+}
+
+static bool is_unprivileged_user(void)
+{
+	return !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN);
 }
 
 struct pipe_inode_info *alloc_pipe_info(void)
@@ -624,22 +628,23 @@ struct pipe_inode_info *alloc_pipe_info(void)
 	unsigned long pipe_bufs = PIPE_DEF_BUFFERS;
 	struct user_struct *user = get_current_user();
 	unsigned long user_bufs;
+	unsigned int max_size = READ_ONCE(pipe_max_size);
 
 	pipe = kzalloc(sizeof(struct pipe_inode_info), GFP_KERNEL_ACCOUNT);
 	if (pipe == NULL)
 		goto out_free_uid;
 
-	if (pipe_bufs * PAGE_SIZE > pipe_max_size && !capable(CAP_SYS_RESOURCE))
-		pipe_bufs = pipe_max_size >> PAGE_SHIFT;
+	if (pipe_bufs * PAGE_SIZE > max_size && !capable(CAP_SYS_RESOURCE))
+		pipe_bufs = max_size >> PAGE_SHIFT;
 
 	user_bufs = account_pipe_buffers(user, 0, pipe_bufs);
 
-	if (too_many_pipe_buffers_soft(user_bufs)) {
+	if (too_many_pipe_buffers_soft(user_bufs) && is_unprivileged_user()) {
 		user_bufs = account_pipe_buffers(user, pipe_bufs, 1);
 		pipe_bufs = 1;
 	}
 
-	if (too_many_pipe_buffers_hard(user_bufs))
+	if (too_many_pipe_buffers_hard(user_bufs) && is_unprivileged_user())
 		goto out_revert_acct;
 
 	pipe->bufs = kcalloc(pipe_bufs, sizeof(struct pipe_buffer),
@@ -1020,18 +1025,16 @@ const struct file_operations pipefifo_fops = {
  * Currently we rely on the pipe array holding a power-of-2 number
  * of pages. Returns 0 on error.
  */
-unsigned int round_pipe_size(unsigned int size)
+unsigned int round_pipe_size(unsigned long size)
 {
-	unsigned long nr_pages;
-
-	if (size < pipe_min_size)
-		size = pipe_min_size;
-
-	nr_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
-	if (nr_pages == 0)
+	if (size > (1U << 31))
 		return 0;
 
-	return roundup_pow_of_two(nr_pages) << PAGE_SHIFT;
+	/* Minimum pipe size, as required by POSIX */
+	if (size < PAGE_SIZE)
+		return PAGE_SIZE;
+
+	return roundup_pow_of_two(size);
 }
 
 /*
@@ -1046,8 +1049,6 @@ static long pipe_set_size(struct pipe_inode_info *pipe, unsigned long arg)
 	long ret = 0;
 
 	size = round_pipe_size(arg);
-	if (size == 0)
-		return -EINVAL;
 	nr_pages = size >> PAGE_SHIFT;
 
 	if (!nr_pages)
@@ -1069,7 +1070,7 @@ static long pipe_set_size(struct pipe_inode_info *pipe, unsigned long arg)
 	if (nr_pages > pipe->buffers &&
 			(too_many_pipe_buffers_hard(user_bufs) ||
 			 too_many_pipe_buffers_soft(user_bufs)) &&
-			!capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN)) {
+			is_unprivileged_user()) {
 		ret = -EPERM;
 		goto out_revert_acct;
 	}
@@ -1125,16 +1126,6 @@ out_revert_acct:
 }
 
 /*
- * This should work even if CONFIG_PROC_FS isn't set, as proc_dopipe_max_size
- * will return an error.
- */
-int pipe_proc_fn(struct ctl_table *table, int write, void __user *buf,
-		 size_t *lenp, loff_t *ppos)
-{
-	return proc_dopipe_max_size(table, write, buf, lenp, ppos);
-}
-
-/*
  * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same
  * location, so checking ->i_pipe is not enough to verify that this is a
  * pipe.
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index 1b8e41597ef5..934633a05d20 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -112,7 +112,7 @@ static inline int cpuset_do_slab_mem_spread(void)
 	return task_spread_slab(current);
 }
 
-extern int current_cpuset_is_being_rebound(void);
+extern bool current_cpuset_is_being_rebound(void);
 
 extern void rebuild_sched_domains(void);
 
@@ -247,9 +247,9 @@ static inline int cpuset_do_slab_mem_spread(void)
 	return 0;
 }
 
-static inline int current_cpuset_is_being_rebound(void)
+static inline bool current_cpuset_is_being_rebound(void)
 {
-	return 0;
+	return false;
 }
 
 static inline void rebuild_sched_domains(void)
diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h
index a992e6ca2f1c..f7ac2aa93269 100644
--- a/include/linux/crash_dump.h
+++ b/include/linux/crash_dump.h
@@ -2,13 +2,13 @@
 #ifndef LINUX_CRASH_DUMP_H
 #define LINUX_CRASH_DUMP_H
 
-#ifdef CONFIG_CRASH_DUMP
 #include <linux/kexec.h>
 #include <linux/proc_fs.h>
 #include <linux/elf.h>
 
 #include <asm/pgtable.h> /* for pgprot_t */
 
+#ifdef CONFIG_CRASH_DUMP
 #define ELFCORE_ADDR_MAX	(-1ULL)
 #define ELFCORE_ADDR_ERR	(-2ULL)
 
@@ -52,13 +52,13 @@ void vmcore_cleanup(void);
  * has passed the elf core header address on command line.
  *
  * This is not just a test if CONFIG_CRASH_DUMP is enabled or not. It will
- * return 1 if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic of
- * previous kernel.
+ * return true if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic
+ * of previous kernel.
  */
 
-static inline int is_kdump_kernel(void)
+static inline bool is_kdump_kernel(void)
 {
-	return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0;
+	return elfcorehdr_addr != ELFCORE_ADDR_MAX;
 }
 
 /* is_vmcore_usable() checks if the kernel is booting after a panic and
@@ -89,7 +89,7 @@ extern int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn));
 extern void unregister_oldmem_pfn_is_ram(void);
 
 #else /* !CONFIG_CRASH_DUMP */
-static inline int is_kdump_kernel(void) { return 0; }
+static inline bool is_kdump_kernel(void) { return 0; }
 #endif /* CONFIG_CRASH_DUMP */
 
 extern unsigned long saved_max_pfn;
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 93b4183cf53d..da0ebaec25f0 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -265,7 +265,7 @@ extern struct resource * __devm_request_region(struct device *dev,
 extern void __devm_release_region(struct device *dev, struct resource *parent,
 				  resource_size_t start, resource_size_t n);
 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
-extern int iomem_is_exclusive(u64 addr);
+extern bool iomem_is_exclusive(u64 addr);
 
 extern int
 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
diff --git a/include/linux/lockref.h b/include/linux/lockref.h
index ef3c9342e119..2eac32095113 100644
--- a/include/linux/lockref.h
+++ b/include/linux/lockref.h
@@ -44,7 +44,7 @@ extern void lockref_mark_dead(struct lockref *);
 extern int lockref_get_not_dead(struct lockref *);
 
 /* Must be called under spinlock for reliable results */
-static inline int __lockref_is_dead(const struct lockref *l)
+static inline bool __lockref_is_dead(const struct lockref *l)
 {
 	return ((int)l->count < 0);
 }
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 7ed0f7782d16..8be5077efb5f 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -332,8 +332,8 @@ void memblock_enforce_memory_limit(phys_addr_t memory_limit);
 void memblock_cap_memory_range(phys_addr_t base, phys_addr_t size);
 void memblock_mem_limit_remove_map(phys_addr_t limit);
 bool memblock_is_memory(phys_addr_t addr);
-int memblock_is_map_memory(phys_addr_t addr);
-int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
+bool memblock_is_map_memory(phys_addr_t addr);
+bool memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
 bool memblock_is_reserved(phys_addr_t addr);
 bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
 
diff --git a/include/linux/module.h b/include/linux/module.h
index 23bfbe52dc05..dafce7bb98f2 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -491,7 +491,7 @@ extern struct mutex module_mutex;
 /* FIXME: It'd be nice to isolate modules during init, too, so they
    aren't used before they (may) fail.  But presently too much code
    (IDE & SCSI) require entry into the module during init.*/
-static inline int module_is_live(struct module *mod)
+static inline bool module_is_live(struct module *mod)
 {
 	return mod->state != MODULE_STATE_GOING;
 }
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 153274f78402..f25c13423bd4 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -138,9 +138,9 @@ extern void __mutex_init(struct mutex *lock, const char *name,
  * mutex_is_locked - is the mutex locked
  * @lock: the mutex to be queried
  *
- * Returns 1 if the mutex is locked, 0 if unlocked.
+ * Returns true if the mutex is locked, false if unlocked.
  */
-static inline int mutex_is_locked(struct mutex *lock)
+static inline bool mutex_is_locked(struct mutex *lock)
 {
 	/*
 	 * XXX think about spin_is_locked
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index 2dc5e9870fcd..5a3bb3b7c9ad 100644
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -167,10 +167,9 @@ void pipe_lock(struct pipe_inode_info *);
 void pipe_unlock(struct pipe_inode_info *);
 void pipe_double_lock(struct pipe_inode_info *, struct pipe_inode_info *);
 
-extern unsigned int pipe_max_size, pipe_min_size;
+extern unsigned int pipe_max_size;
 extern unsigned long pipe_user_pages_hard;
 extern unsigned long pipe_user_pages_soft;
-int pipe_proc_fn(struct ctl_table *, int, void __user *, size_t *, loff_t *);
 
 /* Drop the inode semaphore and wait for a pipe event, atomically */
 void pipe_wait(struct pipe_inode_info *pipe);
@@ -191,6 +190,6 @@ long pipe_fcntl(struct file *, unsigned int, unsigned long arg);
 struct pipe_inode_info *get_pipe_info(struct file *file);
 
 int create_pipe_files(struct file **, int);
-unsigned int round_pipe_size(unsigned int size);
+unsigned int round_pipe_size(unsigned long size);
 
 #endif
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 992bc9948232..b769ecfcc3bd 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -51,9 +51,6 @@ extern int proc_dointvec_minmax(struct ctl_table *, int,
 extern int proc_douintvec_minmax(struct ctl_table *table, int write,
 				 void __user *buffer, size_t *lenp,
 				 loff_t *ppos);
-extern int proc_dopipe_max_size(struct ctl_table *table, int write,
-				void __user *buffer, size_t *lenp,
-				loff_t *ppos);
 extern int proc_dointvec_jiffies(struct ctl_table *, int,
 				 void __user *, size_t *, loff_t *);
 extern int proc_dointvec_userhz_jiffies(struct ctl_table *, int,
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 89b5c53e0203..70423581dc92 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -1610,8 +1610,10 @@ static int __init init_mqueue_fs(void)
 		goto out_filesystem;
 
 	m = kern_mount_data(&mqueue_fs_type, &init_ipc_ns);
-	if (IS_ERR(m))
+	if (IS_ERR(m)) {
+		error = PTR_ERR(m);
 		goto out_filesystem;
+	}
 	init_ipc_ns.mq_mnt = m;
 	return 0;
 
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index f7efa7b4d825..b42037e6e81d 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1254,9 +1254,9 @@ done:
 	return retval;
 }
 
-int current_cpuset_is_being_rebound(void)
+bool current_cpuset_is_being_rebound(void)
 {
-	int ret;
+	bool ret;
 
 	rcu_read_lock();
 	ret = task_cs(current) == cpuset_being_rebound;
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index ef2a47e0eab6..6cdecc6f4c53 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -10,7 +10,6 @@
 #include <linux/jiffies.h>
 #include <linux/irq.h>
 #include <linux/module.h>
-#include <linux/kallsyms.h>
 #include <linux/interrupt.h>
 #include <linux/moduleparam.h>
 #include <linux/timer.h>
diff --git a/kernel/resource.c b/kernel/resource.c
index 8c527d83ca76..e270b5048988 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -1576,17 +1576,17 @@ static int strict_iomem_checks;
 
 /*
  * check if an address is reserved in the iomem resource tree
- * returns 1 if reserved, 0 if not reserved.
+ * returns true if reserved, false if not reserved.
  */
-int iomem_is_exclusive(u64 addr)
+bool iomem_is_exclusive(u64 addr)
 {
 	struct resource *p = &iomem_resource;
-	int err = 0;
+	bool err = false;
 	loff_t l;
 	int size = PAGE_SIZE;
 
 	if (!strict_iomem_checks)
-		return 0;
+		return false;
 
 	addr = addr & PAGE_MASK;
 
@@ -1609,7 +1609,7 @@ int iomem_is_exclusive(u64 addr)
 			continue;
 		if (IS_ENABLED(CONFIG_IO_STRICT_DEVMEM)
 				|| p->flags & IORESOURCE_EXCLUSIVE) {
-			err = 1;
+			err = true;
 			break;
 		}
 	}
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 2fb4e27c636a..f98f28c12020 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -218,6 +218,8 @@ static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
 static int proc_dostring_coredump(struct ctl_table *table, int write,
 		void __user *buffer, size_t *lenp, loff_t *ppos);
 #endif
+static int proc_dopipe_max_size(struct ctl_table *table, int write,
+		void __user *buffer, size_t *lenp, loff_t *ppos);
 
 #ifdef CONFIG_MAGIC_SYSRQ
 /* Note: sysrq code uses it's own private copy */
@@ -1812,8 +1814,7 @@ static struct ctl_table fs_table[] = {
 		.data		= &pipe_max_size,
 		.maxlen		= sizeof(pipe_max_size),
 		.mode		= 0644,
-		.proc_handler	= &pipe_proc_fn,
-		.extra1		= &pipe_min_size,
+		.proc_handler	= proc_dopipe_max_size,
 	},
 	{
 		.procname	= "pipe-user-pages-hard",
@@ -2615,29 +2616,17 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
 				 do_proc_douintvec_minmax_conv, &param);
 }
 
-struct do_proc_dopipe_max_size_conv_param {
-	unsigned int *min;
-};
-
 static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
 					unsigned int *valp,
 					int write, void *data)
 {
-	struct do_proc_dopipe_max_size_conv_param *param = data;
-
 	if (write) {
 		unsigned int val;
 
-		if (*lvalp > UINT_MAX)
-			return -EINVAL;
-
 		val = round_pipe_size(*lvalp);
 		if (val == 0)
 			return -EINVAL;
 
-		if (param->min && *param->min > val)
-			return -ERANGE;
-
 		*valp = val;
 	} else {
 		unsigned int val = *valp;
@@ -2647,14 +2636,11 @@ static int do_proc_dopipe_max_size_conv(unsigned long *lvalp,
 	return 0;
 }
 
-int proc_dopipe_max_size(struct ctl_table *table, int write,
-			 void __user *buffer, size_t *lenp, loff_t *ppos)
+static int proc_dopipe_max_size(struct ctl_table *table, int write,
+				void __user *buffer, size_t *lenp, loff_t *ppos)
 {
-	struct do_proc_dopipe_max_size_conv_param param = {
-		.min = (unsigned int *) table->extra1,
-	};
 	return do_proc_douintvec(table, write, buffer, lenp, ppos,
-				 do_proc_dopipe_max_size_conv, &param);
+				 do_proc_dopipe_max_size_conv, NULL);
 }
 
 static void validate_coredump_safety(void)
@@ -3160,12 +3146,6 @@ int proc_douintvec_minmax(struct ctl_table *table, int write,
 	return -ENOSYS;
 }
 
-int proc_dopipe_max_size(struct ctl_table *table, int write,
-			 void __user *buffer, size_t *lenp, loff_t *ppos)
-{
-	return -ENOSYS;
-}
-
 int proc_dointvec_jiffies(struct ctl_table *table, int write,
 		    void __user *buffer, size_t *lenp, loff_t *ppos)
 {
@@ -3209,7 +3189,6 @@ EXPORT_SYMBOL(proc_douintvec);
 EXPORT_SYMBOL(proc_dointvec_jiffies);
 EXPORT_SYMBOL(proc_dointvec_minmax);
 EXPORT_SYMBOL_GPL(proc_douintvec_minmax);
-EXPORT_SYMBOL_GPL(proc_dopipe_max_size);
 EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
 EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
 EXPORT_SYMBOL(proc_dostring);
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index d32520840fde..6d8183b38e35 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -37,7 +37,6 @@
 #include <linux/hrtimer.h>
 #include <linux/notifier.h>
 #include <linux/syscalls.h>
-#include <linux/kallsyms.h>
 #include <linux/interrupt.h>
 #include <linux/tick.h>
 #include <linux/seq_file.h>
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 1a1423923bcf..b66c264d4194 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -217,7 +217,7 @@ config ENABLE_MUST_CHECK
 config FRAME_WARN
 	int "Warn for stack frames larger than (needs gcc 4.4)"
 	range 0 8192
-	default 0 if KASAN
+	default 3072 if KASAN_EXTRA
 	default 2048 if GCC_PLUGIN_LATENT_ENTROPY
 	default 1280 if (!64BIT && PARISC)
 	default 1024 if (!64BIT && !PARISC)
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index bd38aab05929..3d35d062970d 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan
@@ -20,6 +20,17 @@ config KASAN
 	  Currently CONFIG_KASAN doesn't work with CONFIG_DEBUG_SLAB
 	  (the resulting kernel does not boot).
 
+config KASAN_EXTRA
+	bool "KAsan: extra checks"
+	depends on KASAN && DEBUG_KERNEL && !COMPILE_TEST
+	help
+	  This enables further checks in the kernel address sanitizer, for now
+	  it only includes the address-use-after-scope check that can lead
+	  to excessive kernel stack usage, frame size warnings and longer
+	  compile time.
+	  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 has more
+
+
 choice
 	prompt "Instrumentation type"
 	depends on KASAN
diff --git a/mm/memblock.c b/mm/memblock.c
index 46aacdfa4f4d..5a9ca2a1751b 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1654,7 +1654,7 @@ bool __init_memblock memblock_is_memory(phys_addr_t addr)
 	return memblock_search(&memblock.memory, addr) != -1;
 }
 
-int __init_memblock memblock_is_map_memory(phys_addr_t addr)
+bool __init_memblock memblock_is_map_memory(phys_addr_t addr)
 {
 	int i = memblock_search(&memblock.memory, addr);
 
@@ -1690,13 +1690,13 @@ int __init_memblock memblock_search_pfn_nid(unsigned long pfn,
  * RETURNS:
  * 0 if false, non-zero if true
  */
-int __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
+bool __init_memblock memblock_is_region_memory(phys_addr_t base, phys_addr_t size)
 {
 	int idx = memblock_search(&memblock.memory, base);
 	phys_addr_t end = base + memblock_cap_size(base, &size);
 
 	if (idx == -1)
-		return 0;
+		return false;
 	return (memblock.memory.regions[idx].base +
 		 memblock.memory.regions[idx].size) >= end;
 }
diff --git a/mm/memory.c b/mm/memory.c
index 02b0dd52451d..c7f9a436dbde 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -59,7 +59,6 @@
 #include <linux/writeback.h>
 #include <linux/memcontrol.h>
 #include <linux/mmu_notifier.h>
-#include <linux/kallsyms.h>
 #include <linux/swapops.h>
 #include <linux/elf.h>
 #include <linux/gfp.h>
@@ -767,9 +766,6 @@ static void print_bad_pte(struct vm_area_struct *vma, unsigned long addr,
 		dump_page(page, "bad pte");
 	pr_alert("addr:%p vm_flags:%08lx anon_vma:%p mapping:%p index:%lx\n",
 		 (void *)addr, vma->vm_flags, vma->anon_vma, mapping, index);
-	/*
-	 * Choose text because data symbols depend on CONFIG_KALLSYMS_ALL=y
-	 */
 	pr_alert("file:%pD fault:%pf mmap:%pf readpage:%pf\n",
 		 vma->vm_file,
 		 vma->vm_ops ? vma->vm_ops->fault : NULL,
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c
index 81192701964d..39791b81ede7 100644
--- a/mm/userfaultfd.c
+++ b/mm/userfaultfd.c
@@ -16,7 +16,6 @@
 #include <linux/userfaultfd_k.h>
 #include <linux/mmu_notifier.h>
 #include <linux/hugetlb.h>
-#include <linux/pagemap.h>
 #include <linux/shmem_fs.h>
 #include <asm/tlbflush.h>
 #include "internal.h"
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1076ae0ea9d5..a3e0e4b230ca 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -3583,7 +3583,7 @@ void rt6_sync_up(struct net_device *dev, unsigned int nh_flags)
 {
 	struct arg_netdev_event arg = {
 		.dev = dev,
-		.nh_flags = nh_flags,
+		{ .nh_flags = nh_flags, },
 	};
 
 	if (nh_flags & RTNH_F_DEAD && netif_carrier_ok(dev))
@@ -3692,7 +3692,7 @@ void rt6_sync_down_dev(struct net_device *dev, unsigned long event)
 {
 	struct arg_netdev_event arg = {
 		.dev = dev,
-		.event = event,
+		{ .event = event, },
 	};
 
 	fib6_clean_all(dev_net(dev), fib6_ifdown, &arg);
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan
index dbbd4382f15a..b37f0c2080ee 100644
--- a/scripts/Makefile.kasan
+++ b/scripts/Makefile.kasan
@@ -38,5 +38,8 @@ else
 
 endif
 
+ifdef CONFIG_KASAN_EXTRA
 CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope)
 endif
+
+endif