Merge branch 'akpm/master'

21 files changed, 54 insertions, 45 deletions

diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
index a4482fceacec..f72370b440b1 100644
--- a/Documentation/sysctl/vm.txt
+++ b/Documentation/sysctl/vm.txt
@@ -639,7 +639,7 @@ and don't use much of it.
 The default value is 0.
 
 See Documentation/vm/overcommit-accounting and
-security/commoncap.c::cap_vm_enough_memory() for more information.
+mm/mmap.c::__vm_enough_memory() for more information.
 
 ==============================================================
 
diff --git a/arch/mips/include/uapi/asm/unistd.h b/arch/mips/include/uapi/asm/unistd.h
index d0bdfaa13ee9..b107983c7bca 100644
--- a/arch/mips/include/uapi/asm/unistd.h
+++ b/arch/mips/include/uapi/asm/unistd.h
@@ -378,16 +378,17 @@
 #define __NR_bpf			(__NR_Linux + 355)
 #define __NR_execveat			(__NR_Linux + 356)
 #define __NR_mlock2			(__NR_Linux + 357)
+#define __NR_membarrier			(__NR_Linux + 358)
 
 /*
  * Offset of the last Linux o32 flavoured syscall
  */
-#define __NR_Linux_syscalls		357
+#define __NR_Linux_syscalls		358
 
 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */
 
 #define __NR_O32_Linux			4000
-#define __NR_O32_Linux_syscalls		357
+#define __NR_O32_Linux_syscalls		358
 
 #if _MIPS_SIM == _MIPS_SIM_ABI64
 
@@ -713,16 +714,17 @@
 #define __NR_bpf			(__NR_Linux + 315)
 #define __NR_execveat			(__NR_Linux + 316)
 #define __NR_mlock2			(__NR_Linux + 317)
+#define __NR_membarrier			(__NR_Linux + 318)
 
 /*
  * Offset of the last Linux 64-bit flavoured syscall
  */
-#define __NR_Linux_syscalls		317
+#define __NR_Linux_syscalls		318
 
 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 */
 
 #define __NR_64_Linux			5000
-#define __NR_64_Linux_syscalls		317
+#define __NR_64_Linux_syscalls		318
 
 #if _MIPS_SIM == _MIPS_SIM_NABI32
 
@@ -1052,15 +1054,16 @@
 #define __NR_bpf			(__NR_Linux + 319)
 #define __NR_execveat			(__NR_Linux + 320)
 #define __NR_mlock2			(__NR_Linux + 321)
+#define __NR_membarrier			(__NR_Linux + 322)
 
 /*
  * Offset of the last N32 flavoured syscall
  */
-#define __NR_Linux_syscalls		321
+#define __NR_Linux_syscalls		322
 
 #endif /* _MIPS_SIM == _MIPS_SIM_NABI32 */
 
 #define __NR_N32_Linux			6000
-#define __NR_N32_Linux_syscalls		321
+#define __NR_N32_Linux_syscalls		322
 
 #endif /* _UAPI_ASM_UNISTD_H */
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index b0b377aa1d5d..9265542aba1e 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -600,3 +600,4 @@ EXPORT(sys_call_table)
 	PTR	sys_bpf				/* 4355 */
 	PTR	sys_execveat
 	PTR	sys_mlock2
+	PTR	sys_membarrier
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index f12eb03c0961..79d4fb0ddb78 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -437,4 +437,5 @@ EXPORT(sys_call_table)
 	PTR	sys_bpf				/* 5315 */
 	PTR	sys_execveat
 	PTR	sys_mlock2
+	PTR	sys_membarrier
 	.size	sys_call_table,.-sys_call_table
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index ecdd65a2b02c..235892a70427 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -430,4 +430,5 @@ EXPORT(sysn32_call_table)
 	PTR	sys_bpf
 	PTR	compat_sys_execveat		/* 6320 */
 	PTR	sys_mlock2
+	PTR	sys_membarrier
 	.size	sysn32_call_table,.-sysn32_call_table
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 7a8b2dff16d3..c051bd386a59 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -585,4 +585,5 @@ EXPORT(sys32_call_table)
 	PTR	sys_bpf				/* 4355 */
 	PTR	compat_sys_execveat
 	PTR	sys_mlock2
+	PTR	sys_membarrier
 	.size	sys32_call_table,.-sys32_call_table
diff --git a/arch/sparc/include/uapi/asm/unistd.h b/arch/sparc/include/uapi/asm/unistd.h
index 6f35f4df17f2..efe9479f837b 100644
--- a/arch/sparc/include/uapi/asm/unistd.h
+++ b/arch/sparc/include/uapi/asm/unistd.h
@@ -416,8 +416,9 @@
 #define __NR_memfd_create	348
 #define __NR_bpf		349
 #define __NR_execveat		350
+#define __NR_membarrier		351
 
-#define NR_syscalls		351
+#define NR_syscalls		352
 
 /* Bitmask values returned from kern_features system call.  */
 #define KERN_FEATURE_MIXED_MODE_STACK	0x00000001
diff --git a/arch/sparc/kernel/systbls_32.S b/arch/sparc/kernel/systbls_32.S
index e31a9056a303..cc23b62b6e38 100644
--- a/arch/sparc/kernel/systbls_32.S
+++ b/arch/sparc/kernel/systbls_32.S
@@ -87,4 +87,4 @@ sys_call_table:
 /*335*/	.long sys_syncfs, sys_sendmmsg, sys_setns, sys_process_vm_readv, sys_process_vm_writev
 /*340*/	.long sys_ni_syscall, sys_kcmp, sys_finit_module, sys_sched_setattr, sys_sched_getattr
 /*345*/	.long sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create, sys_bpf
-/*350*/	.long sys_execveat
+/*350*/	.long sys_execveat, sys_membarrier
diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index d72f76ae70eb..f229468a7479 100644
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -88,7 +88,7 @@ sys_call_table32:
 	.word sys_syncfs, compat_sys_sendmmsg, sys_setns, compat_sys_process_vm_readv, compat_sys_process_vm_writev
 /*340*/	.word sys_kern_features, sys_kcmp, sys_finit_module, sys_sched_setattr, sys_sched_getattr
 	.word sys32_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create, sys_bpf
-/*350*/	.word sys32_execveat
+/*350*/	.word sys32_execveat, sys_membarrier
 
 #endif /* CONFIG_COMPAT */
 
@@ -168,4 +168,4 @@ sys_call_table:
 	.word sys_syncfs, sys_sendmmsg, sys_setns, sys_process_vm_readv, sys_process_vm_writev
 /*340*/	.word sys_kern_features, sys_kcmp, sys_finit_module, sys_sched_setattr, sys_sched_getattr
 	.word sys_renameat2, sys_seccomp, sys_getrandom, sys_memfd_create, sys_bpf
-/*350*/	.word sys64_execveat
+/*350*/	.word sys64_execveat, sys_membarrier
diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index da1715ebdd71..3eff7cf75d25 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -555,11 +555,11 @@ static int tegra_sor_compute_params(struct tegra_sor *sor,
 	error = div_s64(active_sym - approx, tu_size);
 	error *= params->num_clocks;
 
-	if (error <= 0 && abs64(error) < params->error) {
+	if (error <= 0 && abs(error) < params->error) {
 		params->active_count = div_u64(active_count, f);
 		params->active_polarity = active_polarity;
 		params->active_frac = active_frac;
-		params->error = abs64(error);
+		params->error = abs(error);
 		params->tu_size = tu_size;
 
 		if (error == 0)
diff --git a/drivers/input/joystick/walkera0701.c b/drivers/input/joystick/walkera0701.c
index d88f5dd3c9d9..9c07fe911075 100644
--- a/drivers/input/joystick/walkera0701.c
+++ b/drivers/input/joystick/walkera0701.c
@@ -150,7 +150,7 @@ static void walkera0701_irq_handler(void *handler_data)
 		if (w->counter == 24) {	/* full frame */
 			walkera0701_parse_frame(w);
 			w->counter = NO_SYNC;
-			if (abs64(pulse_time - SYNC_PULSE) < RESERVE)	/* new frame sync */
+			if (abs(pulse_time - SYNC_PULSE) < RESERVE)	/* new frame sync */
 				w->counter = 0;
 		} else {
 			if ((pulse_time > (ANALOG_MIN_PULSE - RESERVE)
@@ -161,7 +161,7 @@ static void walkera0701_irq_handler(void *handler_data)
 			} else
 				w->counter = NO_SYNC;
 		}
-	} else if (abs64(pulse_time - SYNC_PULSE - BIN0_PULSE) <
+	} else if (abs(pulse_time - SYNC_PULSE - BIN0_PULSE) <
 				RESERVE + BIN1_PULSE - BIN0_PULSE)	/* frame sync .. */
 		w->counter = 0;
 
diff --git a/drivers/media/i2c/ov9650.c b/drivers/media/i2c/ov9650.c
index e691bba1945b..1ee6a5527c38 100644
--- a/drivers/media/i2c/ov9650.c
+++ b/drivers/media/i2c/ov9650.c
@@ -1133,7 +1133,7 @@ static int __ov965x_set_frame_interval(struct ov965x *ov965x,
 		if (mbus_fmt->width != iv->size.width ||
 		    mbus_fmt->height != iv->size.height)
 			continue;
-		err = abs64((u64)(iv->interval.numerator * 10000) /
+		err = abs((u64)(iv->interval.numerator * 10000) /
 			    iv->interval.denominator - req_int);
 		if (err < min_err) {
 			fiv = iv;
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 66c963dbc3fd..25a722b6a404 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -787,7 +787,7 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw,
 	struct mac80211_hwsim_data *data = hw->priv;
 	u64 now = mac80211_hwsim_get_tsf(hw, vif);
 	u32 bcn_int = data->beacon_int;
-	u64 delta = abs64(tsf - now);
+	u64 delta = abs(tsf - now);
 
 	/* adjust after beaconing with new timestamp at old TBTT */
 	if (tsf > now) {
diff --git a/drivers/thermal/power_allocator.c b/drivers/thermal/power_allocator.c
index e570ff084add..f0fbea386869 100644
--- a/drivers/thermal/power_allocator.c
+++ b/drivers/thermal/power_allocator.c
@@ -228,7 +228,7 @@ static u32 pid_controller(struct thermal_zone_device *tz,
 	if (err < int_to_frac(tz->tzp->integral_cutoff)) {
 		s64 i_next = i + mul_frac(tz->tzp->k_i, err);
 
-		if (abs64(i_next) < max_power_frac) {
+		if (abs(i_next) < max_power_frac) {
 			i = i_next;
 			params->err_integral += err;
 		}
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 47249a30eae3..20f766afa4c7 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -91,8 +91,7 @@ static struct w1_master *w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 	err = device_register(&dev->dev);
 	if (err) {
 		pr_err("Failed to register master device. err=%d\n", err);
-		memset(dev, 0, sizeof(struct w1_master));
-		kfree(dev);
+		put_device(&dev->dev);
 		dev = NULL;
 	}
 
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index 284c1542783e..8b907c5cc913 100644
--- a/fs/gfs2/lock_dlm.c
+++ b/fs/gfs2/lock_dlm.c
@@ -50,7 +50,7 @@ static inline void gfs2_update_stats(struct gfs2_lkstats *s, unsigned index,
 	s64 delta = sample - s->stats[index];
 	s->stats[index] += (delta >> 3);
 	index++;
-	s->stats[index] += ((abs64(delta) - s->stats[index]) >> 2);
+	s->stats[index] += ((abs(delta) - s->stats[index]) >> 2);
 }
 
 /**
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2c13f747ac2e..350dfb08aee3 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -200,28 +200,28 @@ extern int _cond_resched(void);
 
 #define might_sleep_if(cond) do { if (cond) might_sleep(); } while (0)
 
-/*
- * abs() handles unsigned and signed longs, ints, shorts and chars.  For all
- * input types abs() returns a signed long.
- * abs() should not be used for 64-bit types (s64, u64, long long) - use abs64()
- * for those.
+/**
+ * abs - return absolute value of an argument
+ * @x: the value.  If it is unsigned type, it is converted to signed type first
+ *   (s64, long or int depending on its size).
+ *
+ * Return: an absolute value of x.  If x is 64-bit, macro's return type is s64,
+ *   otherwise it is signed long.
  */
-#define abs(x) ({						\
-		long ret;					\
-		if (sizeof(x) == sizeof(long)) {		\
-			long __x = (x);				\
-			ret = (__x < 0) ? -__x : __x;		\
-		} else {					\
-			int __x = (x);				\
-			ret = (__x < 0) ? -__x : __x;		\
-		}						\
-		ret;						\
-	})
-
-#define abs64(x) ({				\
-		s64 __x = (x);			\
-		(__x < 0) ? -__x : __x;		\
-	})
+#define abs(x) __builtin_choose_expr(sizeof(x) == sizeof(s64), ({	\
+		s64 __x = (x);						\
+		(__x < 0) ? -__x : __x;					\
+	}), ({								\
+		long ret;						\
+		if (sizeof(x) == sizeof(long)) {			\
+			long __x = (x);					\
+			ret = (__x < 0) ? -__x : __x;			\
+		} else {						\
+			int __x = (x);					\
+			ret = (__x < 0) ? -__x : __x;			\
+		}							\
+		ret;							\
+	}))
 
 /**
  * reciprocal_scale - "scale" a value into range [0, ep_ro)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 125f16a29cf6..70cf14402653 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1614,7 +1614,7 @@ static __always_inline void timekeeping_freqadjust(struct timekeeper *tk,
 	negative = (tick_error < 0);
 
 	/* Sort out the magnitude of the correction */
-	tick_error = abs64(tick_error);
+	tick_error = abs(tick_error);
 	for (adj = 0; tick_error > interval; adj++)
 		tick_error >>= 1;
 
diff --git a/lib/div64.c b/lib/div64.c
index 19ea7ed4b948..62a698a432bc 100644
--- a/lib/div64.c
+++ b/lib/div64.c
@@ -162,7 +162,7 @@ s64 div64_s64(s64 dividend, s64 divisor)
 {
 	s64 quot, t;
 
-	quot = div64_u64(abs64(dividend), abs64(divisor));
+	quot = div64_u64(abs(dividend), abs(divisor));
 	t = (dividend ^ divisor) >> 63;
 
 	return (quot ^ t) - t;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 76ca4e75f785..51f7257a0e8f 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1691,6 +1691,8 @@ static int ip_route_input_slow(struct sk_buff *skb, __be32 daddr, __be32 saddr,
 	struct net    *net = dev_net(dev);
 	bool do_cache;
 
+	res.table = 0;
+
 	/* IP on this device is disabled. */
 
 	if (!in_dev)
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index a0a431824f63..aab9e3f29755 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -331,7 +331,7 @@ void sctp_transport_update_rto(struct sctp_transport *tp, __u32 rtt)
 		 * 1/8, rto_alpha would be expressed as 3.
 		 */
 		tp->rttvar = tp->rttvar - (tp->rttvar >> net->sctp.rto_beta)
-			+ (((__u32)abs64((__s64)tp->srtt - (__s64)rtt)) >> net->sctp.rto_beta);
+			+ (((__u32)abs((__s64)tp->srtt - (__s64)rtt)) >> net->sctp.rto_beta);
 		tp->srtt = tp->srtt - (tp->srtt >> net->sctp.rto_alpha)
 			+ (rtt >> net->sctp.rto_alpha);
 	} else {