29 files changed, 57 insertions, 21 deletions

diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h
index 299a822d2c4e..c227ccba60ae 100644
--- a/include/uapi/sound/asound.h
+++ b/include/uapi/sound/asound.h
@@ -94,7 +94,7 @@ enum {
         SNDRV_HWDEP_IFACE_VX,           /* Digigram VX cards */
         SNDRV_HWDEP_IFACE_MIXART,       /* Digigram miXart cards */
         SNDRV_HWDEP_IFACE_USX2Y,        /* Tascam US122, US224 & US428 usb */
-        SNDRV_HWDEP_IFACE_EMUX_WAVETABLE, /* EmuX wavetable */  
+        SNDRV_HWDEP_IFACE_EMUX_WAVETABLE, /* EmuX wavetable */
         SNDRV_HWDEP_IFACE_BLUETOOTH,    /* Bluetooth audio */
         SNDRV_HWDEP_IFACE_USX2Y_PCM,    /* Tascam US122, US224 & US428 rawusb pcm */
         SNDRV_HWDEP_IFACE_PCXHR,        /* Digigram PCXHR */
@@ -384,7 +384,7 @@ struct snd_mask {
 
 struct snd_pcm_hw_params {
         unsigned int flags;
-        struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
+        struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
                                SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
         struct snd_mask mres[5];        /* reserved masks */
         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
@@ -857,7 +857,7 @@ typedef int __bitwise snd_ctl_elem_iface_t;
 #define SNDRV_CTL_ELEM_ACCESS_INACTIVE          (1<<8)  /* control does actually nothing, but may be updated */
 #define SNDRV_CTL_ELEM_ACCESS_LOCK              (1<<9)  /* write lock */
 #define SNDRV_CTL_ELEM_ACCESS_OWNER             (1<<10) /* write lock owner */
-#define SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK      (1<<28) /* kernel use a TLV callback */ 
+#define SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK      (1<<28) /* kernel use a TLV callback */
 #define SNDRV_CTL_ELEM_ACCESS_USER              (1<<29) /* user space element */
 /* bits 30 and 31 are obsoleted (for indirect access) */
 
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 9d93db81fa36..10cdb9c26b5d 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -901,9 +901,11 @@ list_update_cgroup_event(struct perf_event *event,
         cpuctx_entry = &cpuctx->cgrp_cpuctx_entry;
         /* cpuctx->cgrp is NULL unless a cgroup event is active in this CPU .*/
         if (add) {
+                struct perf_cgroup *cgrp = perf_cgroup_from_task(current, ctx);
+
                 list_add(cpuctx_entry, this_cpu_ptr(&cgrp_cpuctx_list));
-                if (perf_cgroup_from_task(current, ctx) == event->cgrp)
-                        cpuctx->cgrp = event->cgrp;
+                if (cgroup_is_descendant(cgrp->css.cgroup, event->cgrp->css.cgroup))
+                        cpuctx->cgrp = cgrp;
         } else {
                 list_del(cpuctx_entry);
                 cpuctx->cgrp = NULL;
diff --git a/tools/arch/x86/include/asm/disabled-features.h b/tools/arch/x86/include/asm/disabled-features.h
index c1a6d5d0da0d..c10c9128f54e 100644
--- a/tools/arch/x86/include/asm/disabled-features.h
+++ b/tools/arch/x86/include/asm/disabled-features.h
@@ -1,4 +1,3 @@
-/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_X86_DISABLED_FEATURES_H
 #define _ASM_X86_DISABLED_FEATURES_H
 
diff --git a/tools/arch/x86/include/asm/required-features.h b/tools/arch/x86/include/asm/required-features.h
index 59ac6baafb6a..d91ba04dd007 100644
--- a/tools/arch/x86/include/asm/required-features.h
+++ b/tools/arch/x86/include/asm/required-features.h
@@ -1,4 +1,3 @@
-/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_X86_REQUIRED_FEATURES_H
 #define _ASM_X86_REQUIRED_FEATURES_H
 
diff --git a/tools/arch/x86/include/uapi/asm/unistd.h b/tools/arch/x86/include/uapi/asm/unistd.h
index a26df0d75cd0..30d7d04d72d6 100644
--- a/tools/arch/x86/include/uapi/asm/unistd.h
+++ b/tools/arch/x86/include/uapi/asm/unistd.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_ASM_X86_UNISTD_H
 #define _UAPI_ASM_X86_UNISTD_H
 
diff --git a/tools/arch/x86/lib/memcpy_64.S b/tools/arch/x86/lib/memcpy_64.S
index ecf2c2067281..9a53a06e5a3e 100644
--- a/tools/arch/x86/lib/memcpy_64.S
+++ b/tools/arch/x86/lib/memcpy_64.S
@@ -1,10 +1,10 @@
-/* SPDX-License-Identifier: GPL-2.0 */
 /* Copyright 2002 Andi Kleen */
 
 #include <linux/linkage.h>
 #include <asm/errno.h>
 #include <asm/cpufeatures.h>
 #include <asm/alternative-asm.h>
+#include <asm/export.h>
 
 /*
  * We build a jump to memcpy_orig by default which gets NOPped out on
@@ -41,6 +41,8 @@ ENTRY(memcpy)
         ret
 ENDPROC(memcpy)
 ENDPROC(__memcpy)
+EXPORT_SYMBOL(memcpy)
+EXPORT_SYMBOL(__memcpy)
 
 /*
  * memcpy_erms() - enhanced fast string memcpy. This is faster and
@@ -275,6 +277,7 @@ ENTRY(memcpy_mcsafe_unrolled)
         xorq %rax, %rax
         ret
 ENDPROC(memcpy_mcsafe_unrolled)
+EXPORT_SYMBOL_GPL(memcpy_mcsafe_unrolled)
 
         .section .fixup, "ax"
         /* Return -EFAULT for any failure */
diff --git a/tools/include/asm-generic/bitops/__fls.h b/tools/include/asm-generic/bitops/__fls.h
index a60a7ccb6782..03f721a8a2b1 100644
--- a/tools/include/asm-generic/bitops/__fls.h
+++ b/tools/include/asm-generic/bitops/__fls.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_GENERIC_BITOPS___FLS_H_
 #define _ASM_GENERIC_BITOPS___FLS_H_
 
diff --git a/tools/include/asm-generic/bitops/arch_hweight.h b/tools/include/asm-generic/bitops/arch_hweight.h
index 6a211f40665c..c2705e1d220d 100644
--- a/tools/include/asm-generic/bitops/arch_hweight.h
+++ b/tools/include/asm-generic/bitops/arch_hweight.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_GENERIC_BITOPS_ARCH_HWEIGHT_H_
 #define _ASM_GENERIC_BITOPS_ARCH_HWEIGHT_H_
 
diff --git a/tools/include/asm-generic/bitops/const_hweight.h b/tools/include/asm-generic/bitops/const_hweight.h
index 0a7e06623470..149faeeeeaf2 100644
--- a/tools/include/asm-generic/bitops/const_hweight.h
+++ b/tools/include/asm-generic/bitops/const_hweight.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_
 #define _ASM_GENERIC_BITOPS_CONST_HWEIGHT_H_
 
diff --git a/tools/include/asm-generic/bitops/fls.h b/tools/include/asm-generic/bitops/fls.h
index 0576d1f42f43..753aecaab641 100644
--- a/tools/include/asm-generic/bitops/fls.h
+++ b/tools/include/asm-generic/bitops/fls.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_GENERIC_BITOPS_FLS_H_
 #define _ASM_GENERIC_BITOPS_FLS_H_
 
diff --git a/tools/include/asm-generic/bitops/fls64.h b/tools/include/asm-generic/bitops/fls64.h
index b097cf8444e3..866f2b2304ff 100644
--- a/tools/include/asm-generic/bitops/fls64.h
+++ b/tools/include/asm-generic/bitops/fls64.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_GENERIC_BITOPS_FLS64_H_
 #define _ASM_GENERIC_BITOPS_FLS64_H_
 
diff --git a/tools/include/asm/export.h b/tools/include/asm/export.h
new file mode 100644
index 000000000000..2cb1a0d83035
--- /dev/null
+++ b/tools/include/asm/export.h
@@ -0,0 +1,7 @@
+#ifndef _TOOLS_ASM_EXPORT_H
+#define _TOOLS_ASM_EXPORT_H
+
+#define EXPORT_SYMBOL(x)
+#define EXPORT_SYMBOL_GPL(x)
+
+#endif /* _TOOLS_ASM_EXPORT_H */
diff --git a/tools/include/linux/hash.h b/tools/include/linux/hash.h
index 2c4183bbc504..ad6fa21d977b 100644
--- a/tools/include/linux/hash.h
+++ b/tools/include/linux/hash.h
@@ -1,4 +1,3 @@
-/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _LINUX_HASH_H
 #define _LINUX_HASH_H
 /* Fast hashing routine for ints,  longs and pointers.
diff --git a/tools/include/uapi/asm-generic/ioctls.h b/tools/include/uapi/asm-generic/ioctls.h
index 14baf9f23a14..040651735662 100644
--- a/tools/include/uapi/asm-generic/ioctls.h
+++ b/tools/include/uapi/asm-generic/ioctls.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef __ASM_GENERIC_IOCTLS_H
 #define __ASM_GENERIC_IOCTLS_H
 
diff --git a/tools/include/uapi/asm-generic/mman-common.h b/tools/include/uapi/asm-generic/mman-common.h
index 203268f9231e..6d319c46fd90 100644
--- a/tools/include/uapi/asm-generic/mman-common.h
+++ b/tools/include/uapi/asm-generic/mman-common.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef __ASM_GENERIC_MMAN_COMMON_H
 #define __ASM_GENERIC_MMAN_COMMON_H
 
diff --git a/tools/include/uapi/asm-generic/mman.h b/tools/include/uapi/asm-generic/mman.h
index f7c7b4355e56..2dffcbf705b3 100644
--- a/tools/include/uapi/asm-generic/mman.h
+++ b/tools/include/uapi/asm-generic/mman.h
@@ -1,8 +1,8 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef __ASM_GENERIC_MMAN_H
 #define __ASM_GENERIC_MMAN_H
 
-#include <uapi/asm-generic/mman-common.h>
+#include <asm-generic/mman-common.h>
 
 #define MAP_GROWSDOWN   0x0100          /* stack-like segment */
 #define MAP_DENYWRITE   0x0800          /* ETXTBSY */
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 01cc7ba39924..30f2ce76b517 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /* Copyright (c) 2011-2014 PLUMgrid, http://plumgrid.com
  *
  * This program is free software; you can redistribute it and/or
@@ -569,10 +570,9 @@ union bpf_attr {
  *     @flags: reserved for future use
  *     Return: 0 on success or negative error code
  *
- * int bpf_sk_redirect_map(skb, map, key, flags)
+ * int bpf_sk_redirect_map(map, key, flags)
  *     Redirect skb to a sock in map using key as a lookup key for the
  *     sock in map.
- *     @skb: pointer to skb
  *     @map: pointer to sockmap
  *     @key: key to lookup sock in map
  *     @flags: reserved for future use
diff --git a/tools/include/uapi/linux/bpf_common.h b/tools/include/uapi/linux/bpf_common.h
index 64ba734aba80..18be90725ab0 100644
--- a/tools/include/uapi/linux/bpf_common.h
+++ b/tools/include/uapi/linux/bpf_common.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI__LINUX_BPF_COMMON_H__
 #define _UAPI__LINUX_BPF_COMMON_H__
 
diff --git a/tools/include/uapi/linux/fcntl.h b/tools/include/uapi/linux/fcntl.h
index b6705247afe8..6448cdd9a350 100644
--- a/tools/include/uapi/linux/fcntl.h
+++ b/tools/include/uapi/linux/fcntl.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_LINUX_FCNTL_H
 #define _UAPI_LINUX_FCNTL_H
 
diff --git a/tools/include/uapi/linux/hw_breakpoint.h b/tools/include/uapi/linux/hw_breakpoint.h
index 6394ea9d5524..965e4d8606d8 100644
--- a/tools/include/uapi/linux/hw_breakpoint.h
+++ b/tools/include/uapi/linux/hw_breakpoint.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_LINUX_HW_BREAKPOINT_H
 #define _UAPI_LINUX_HW_BREAKPOINT_H
 
diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h
index 838887587411..7e99999d6236 100644
--- a/tools/include/uapi/linux/kvm.h
+++ b/tools/include/uapi/linux/kvm.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef __LINUX_KVM_H
 #define __LINUX_KVM_H
 
diff --git a/tools/include/uapi/linux/mman.h b/tools/include/uapi/linux/mman.h
index 64d2b4e556e5..bfd5938fede6 100644
--- a/tools/include/uapi/linux/mman.h
+++ b/tools/include/uapi/linux/mman.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_LINUX_MMAN_H
 #define _UAPI_LINUX_MMAN_H
 
diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 140ae638cfd6..362493a2f950 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * Performance events:
  *
diff --git a/tools/include/uapi/linux/sched.h b/tools/include/uapi/linux/sched.h
index e2a6c7b3510b..30a9e51bbb1e 100644
--- a/tools/include/uapi/linux/sched.h
+++ b/tools/include/uapi/linux/sched.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_LINUX_SCHED_H
 #define _UAPI_LINUX_SCHED_H
 
diff --git a/tools/include/uapi/linux/stat.h b/tools/include/uapi/linux/stat.h
index 9eac599afd91..7b35e98d3c58 100644
--- a/tools/include/uapi/linux/stat.h
+++ b/tools/include/uapi/linux/stat.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_LINUX_STAT_H
 #define _UAPI_LINUX_STAT_H
 
diff --git a/tools/include/uapi/linux/vhost.h b/tools/include/uapi/linux/vhost.h
index 60180c0b5dc6..c51f8e5cc608 100644
--- a/tools/include/uapi/linux/vhost.h
+++ b/tools/include/uapi/linux/vhost.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _LINUX_VHOST_H
 #define _LINUX_VHOST_H
 /* Userspace interface for in-kernel virtio accelerators. */
diff --git a/tools/include/uapi/sound/asound.h b/tools/include/uapi/sound/asound.h
index 87bf30b182df..c227ccba60ae 100644
--- a/tools/include/uapi/sound/asound.h
+++ b/tools/include/uapi/sound/asound.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
 /*
  *  Advanced Linux Sound Architecture - ALSA - Driver
  *  Copyright (c) 1994-2003 by Jaroslav Kysela <perex@perex.cz>,
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 4397a8b6e6cd..aa66791b1bfc 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -606,9 +606,19 @@ static struct arch *arch__find(const char *name)
 int symbol__alloc_hist(struct symbol *sym)
 {
         struct annotation *notes = symbol__annotation(sym);
-        const size_t size = symbol__size(sym);
+        size_t size = symbol__size(sym);
         size_t sizeof_sym_hist;
 
+        /*
+         * Add buffer of one element for zero length symbol.
+         * When sample is taken from first instruction of
+         * zero length symbol, perf still resolves it and
+         * shows symbol name in perf report and allows to
+         * annotate it.
+         */
+        if (size == 0)
+                size = 1;
+
         /* Check for overflow when calculating sizeof_sym_hist */
         if (size > (SIZE_MAX - sizeof(struct sym_hist)) / sizeof(struct sym_hist_entry))
                 return -1;
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index dcfdafdc2f1c..6680e4fb7967 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -154,6 +154,10 @@ do {							\
         yycolumn += yyleng;                             \
 } while (0);
 
+#define USER_REJECT             \
+        yycolumn -= yyleng;     \
+        REJECT
+
 %}
 
 %x mem
@@ -335,8 +339,8 @@ r{num_raw_hex}		{ return raw(yyscanner); }
 {num_hex}               { return value(yyscanner, 16); }
 
 {modifier_event}        { return str(yyscanner, PE_MODIFIER_EVENT); }
-{bpf_object}            { if (!isbpf(yyscanner)) REJECT; return str(yyscanner, PE_BPF_OBJECT); }
-{bpf_source}            { if (!isbpf(yyscanner)) REJECT; return str(yyscanner, PE_BPF_SOURCE); }
+{bpf_object}            { if (!isbpf(yyscanner)) USER_REJECT; return str(yyscanner, PE_BPF_OBJECT); }
+{bpf_source}            { if (!isbpf(yyscanner)) USER_REJECT; return str(yyscanner, PE_BPF_SOURCE); }
 {name}                  { return pmu_str_check(yyscanner); }
 "/"                     { BEGIN(config); return '/'; }
 -                       { return '-'; }