Merge branch 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers into asm-generic

Patches from David Howells <dhowells@redhat.com>:

This is to complete part of the UAPI disintegration for which the
preparatory patches were pulled recently.

Note that there are some fixup patches which are at the base of the
branch aimed at you, plus all arches get the asm-generic branch merged in too.

* 'disintegrate-asm-generic' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: (Scripted) Disintegrate include/asm-generic
  UAPI: Fix conditional header installation handling (notably kvm_para.h on m68k)
  c6x: remove c6x signal.h
  UAPI: Split compound conditionals containing __KERNEL__ in Arm64
  UAPI: Fix the guards on various asm/unistd.h files

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

6 files changed, 95 insertions, 31 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 2403a63b5da5..35c4565ee8fa 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -452,7 +452,8 @@ config SLUB_STATS
 config DEBUG_KMEMLEAK
 	bool "Kernel memory leak detector"
 	depends on DEBUG_KERNEL && EXPERIMENTAL && \
-		(X86 || ARM || PPC || MIPS || S390 || SPARC64 || SUPERH || MICROBLAZE || TILE)
+		(X86 || ARM || PPC || MIPS || S390 || SPARC64 || SUPERH || \
+		 MICROBLAZE || TILE || ARM64)
 
 	select DEBUG_FS
 	select STACKTRACE if STACKTRACE_SUPPORT
@@ -629,6 +630,20 @@ config PROVE_RCU_REPEATEDLY
 
 	 Say N if you are unsure.
 
+config PROVE_RCU_DELAY
+	bool "RCU debugging: preemptible RCU race provocation"
+	depends on DEBUG_KERNEL && PREEMPT_RCU
+	default n
+	help
+	 There is a class of races that involve an unlikely preemption
+	 of __rcu_read_unlock() just after ->rcu_read_lock_nesting has
+	 been set to INT_MIN.  This feature inserts a delay at that
+	 point to increase the probability of these races.
+
+	 Say Y to increase probability of preemption of __rcu_read_unlock().
+
+	 Say N if you are unsure.
+
 config SPARSE_RCU_POINTER
 	bool "RCU debugging: sparse-based checks for pointer usage"
 	default n
@@ -739,7 +754,8 @@ config DEBUG_BUGVERBOSE
 	bool "Verbose BUG() reporting (adds 70K)" if DEBUG_KERNEL && EXPERT
 	depends on BUG
 	depends on ARM || AVR32 || M32R || M68K || SPARC32 || SPARC64 || \
-		   FRV || SUPERH || GENERIC_BUG || BLACKFIN || MN10300 || TILE
+		   FRV || SUPERH || GENERIC_BUG || BLACKFIN || MN10300 || \
+		   TILE || ARM64
 	default y
 	help
 	  Say Y here to make BUG() panics output the file name and line number
diff --git a/lib/bcd.c b/lib/bcd.c
index 55efaf742346..40d304efe272 100644
--- a/lib/bcd.c
+++ b/lib/bcd.c
@@ -1,14 +1,14 @@
 #include <linux/bcd.h>
 #include <linux/export.h>
 
-unsigned bcd2bin(unsigned char val)
+unsigned _bcd2bin(unsigned char val)
 {
 	return (val & 0x0f) + (val >> 4) * 10;
 }
-EXPORT_SYMBOL(bcd2bin);
+EXPORT_SYMBOL(_bcd2bin);
 
-unsigned char bin2bcd(unsigned val)
+unsigned char _bin2bcd(unsigned val)
 {
 	return ((val / 10) << 4) + val % 10;
 }
-EXPORT_SYMBOL(bin2bcd);
+EXPORT_SYMBOL(_bin2bcd);
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 7ca29a0a3019..e7f7d993357a 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -521,25 +521,25 @@ static char *dynamic_emit_prefix(const struct _ddebug *desc, char *buf)
 	int pos_after_tid;
 	int pos = 0;
 
-	pos += snprintf(buf + pos, remaining(pos), "%s", KERN_DEBUG);
+	*buf = '\0';
+
 	if (desc->flags & _DPRINTK_FLAGS_INCL_TID) {
 		if (in_interrupt())
-			pos += snprintf(buf + pos, remaining(pos), "%s ",
-						"<intr>");
+			pos += snprintf(buf + pos, remaining(pos), "<intr> ");
 		else
 			pos += snprintf(buf + pos, remaining(pos), "[%d] ",
-						task_pid_vnr(current));
+					task_pid_vnr(current));
 	}
 	pos_after_tid = pos;
 	if (desc->flags & _DPRINTK_FLAGS_INCL_MODNAME)
 		pos += snprintf(buf + pos, remaining(pos), "%s:",
-					desc->modname);
+				desc->modname);
 	if (desc->flags & _DPRINTK_FLAGS_INCL_FUNCNAME)
 		pos += snprintf(buf + pos, remaining(pos), "%s:",
-					desc->function);
+				desc->function);
 	if (desc->flags & _DPRINTK_FLAGS_INCL_LINENO)
 		pos += snprintf(buf + pos, remaining(pos), "%d:",
-					desc->lineno);
+				desc->lineno);
 	if (pos - pos_after_tid)
 		pos += snprintf(buf + pos, remaining(pos), " ");
 	if (pos >= PREFIX_SIZE)
@@ -559,9 +559,13 @@ int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
 	BUG_ON(!fmt);
 
 	va_start(args, fmt);
+
 	vaf.fmt = fmt;
 	vaf.va = &args;
-	res = printk("%s%pV", dynamic_emit_prefix(descriptor, buf), &vaf);
+
+	res = printk(KERN_DEBUG "%s%pV",
+		     dynamic_emit_prefix(descriptor, buf), &vaf);
+
 	va_end(args);
 
 	return res;
@@ -574,15 +578,26 @@ int __dynamic_dev_dbg(struct _ddebug *descriptor,
 	struct va_format vaf;
 	va_list args;
 	int res;
-	char buf[PREFIX_SIZE];
 
 	BUG_ON(!descriptor);
 	BUG_ON(!fmt);
 
 	va_start(args, fmt);
+
 	vaf.fmt = fmt;
 	vaf.va = &args;
-	res = __dev_printk(dynamic_emit_prefix(descriptor, buf), dev, &vaf);
+
+	if (!dev) {
+		res = printk(KERN_DEBUG "(NULL device *): %pV", &vaf);
+	} else {
+		char buf[PREFIX_SIZE];
+
+		res = dev_printk_emit(7, dev, "%s%s %s: %pV",
+				      dynamic_emit_prefix(descriptor, buf),
+				      dev_driver_string(dev), dev_name(dev),
+				      &vaf);
+	}
+
 	va_end(args);
 
 	return res;
@@ -592,20 +607,35 @@ EXPORT_SYMBOL(__dynamic_dev_dbg);
 #ifdef CONFIG_NET
 
 int __dynamic_netdev_dbg(struct _ddebug *descriptor,
-		      const struct net_device *dev, const char *fmt, ...)
+			 const struct net_device *dev, const char *fmt, ...)
 {
 	struct va_format vaf;
 	va_list args;
 	int res;
-	char buf[PREFIX_SIZE];
 
 	BUG_ON(!descriptor);
 	BUG_ON(!fmt);
 
 	va_start(args, fmt);
+
 	vaf.fmt = fmt;
 	vaf.va = &args;
-	res = __netdev_printk(dynamic_emit_prefix(descriptor, buf), dev, &vaf);
+
+	if (dev && dev->dev.parent) {
+		char buf[PREFIX_SIZE];
+
+		res = dev_printk_emit(7, dev->dev.parent,
+				      "%s%s %s %s: %pV",
+				      dynamic_emit_prefix(descriptor, buf),
+				      dev_driver_string(dev->dev.parent),
+				      dev_name(dev->dev.parent),
+				      netdev_name(dev), &vaf);
+	} else if (dev) {
+		res = printk(KERN_DEBUG "%s: %pV", netdev_name(dev), &vaf);
+	} else {
+		res = printk(KERN_DEBUG "(NULL net_device): %pV", &vaf);
+	}
+
 	va_end(args);
 
 	return res;
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 0401d2916d9f..52e5abbc41db 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -375,14 +375,14 @@ static int uevent_net_init(struct net *net)
 	struct uevent_sock *ue_sk;
 	struct netlink_kernel_cfg cfg = {
 		.groups	= 1,
+		.flags	= NL_CFG_F_NONROOT_RECV,
 	};
 
 	ue_sk = kzalloc(sizeof(*ue_sk), GFP_KERNEL);
 	if (!ue_sk)
 		return -ENOMEM;
 
-	ue_sk->sk = netlink_kernel_create(net, NETLINK_KOBJECT_UEVENT,
-					  THIS_MODULE, &cfg);
+	ue_sk->sk = netlink_kernel_create(net, NETLINK_KOBJECT_UEVENT, &cfg);
 	if (!ue_sk->sk) {
 		printk(KERN_ERR
 		       "kobject_uevent: unable to create netlink socket!\n");
@@ -422,7 +422,6 @@ static struct pernet_operations uevent_net_ops = {
 
 static int __init kobject_uevent_init(void)
 {
-	netlink_set_nonroot(NETLINK_KOBJECT_UEVENT, NL_NONROOT_RECV);
 	return register_pernet_subsys(&uevent_net_ops);
 }
 
diff --git a/lib/nlattr.c b/lib/nlattr.c
index 4226dfeb5178..18eca7809b08 100644
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -22,6 +22,10 @@ static const u16 nla_attr_minlen[NLA_TYPE_MAX+1] = {
 	[NLA_U64]	= sizeof(u64),
 	[NLA_MSECS]	= sizeof(u64),
 	[NLA_NESTED]	= NLA_HDRLEN,
+	[NLA_S8]	= sizeof(s8),
+	[NLA_S16]	= sizeof(s16),
+	[NLA_S32]	= sizeof(s32),
+	[NLA_S64]	= sizeof(s64),
 };
 
 static int validate_nla(const struct nlattr *nla, int maxtype,
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 45bc1f83a5ad..f114bf6a8e13 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -170,7 +170,7 @@ void __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
  * Statically reserve bounce buffer space and initialize bounce buffer data
  * structures for the software IO TLB used to implement the DMA API.
  */
-void __init
+static void __init
 swiotlb_init_with_default_size(size_t default_size, int verbose)
 {
 	unsigned long bytes;
@@ -206,8 +206,9 @@ swiotlb_init(int verbose)
 int
 swiotlb_late_init_with_default_size(size_t default_size)
 {
-	unsigned long i, bytes, req_nslabs = io_tlb_nslabs;
+	unsigned long bytes, req_nslabs = io_tlb_nslabs;
 	unsigned int order;
+	int rc = 0;
 
 	if (!io_tlb_nslabs) {
 		io_tlb_nslabs = (default_size >> IO_TLB_SHIFT);
@@ -229,16 +230,32 @@ swiotlb_late_init_with_default_size(size_t default_size)
 		order--;
 	}
 
-	if (!io_tlb_start)
-		goto cleanup1;
-
+	if (!io_tlb_start) {
+		io_tlb_nslabs = req_nslabs;
+		return -ENOMEM;
+	}
 	if (order != get_order(bytes)) {
 		printk(KERN_WARNING "Warning: only able to allocate %ld MB "
 		       "for software IO TLB\n", (PAGE_SIZE << order) >> 20);
 		io_tlb_nslabs = SLABS_PER_PAGE << order;
-		bytes = io_tlb_nslabs << IO_TLB_SHIFT;
 	}
+	rc = swiotlb_late_init_with_tbl(io_tlb_start, io_tlb_nslabs);
+	if (rc)
+		free_pages((unsigned long)io_tlb_start, order);
+	return rc;
+}
+
+int
+swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs)
+{
+	unsigned long i, bytes;
+
+	bytes = nslabs << IO_TLB_SHIFT;
+
+	io_tlb_nslabs = nslabs;
+	io_tlb_start = tlb;
 	io_tlb_end = io_tlb_start + bytes;
+
 	memset(io_tlb_start, 0, bytes);
 
 	/*
@@ -288,10 +305,8 @@ cleanup3:
 	io_tlb_list = NULL;
 cleanup2:
 	io_tlb_end = NULL;
-	free_pages((unsigned long)io_tlb_start, order);
 	io_tlb_start = NULL;
-cleanup1:
-	io_tlb_nslabs = req_nslabs;
+	io_tlb_nslabs = 0;
 	return -ENOMEM;
 }