Merge android-4.4.113 (ef588ef) into msm-4.4

* refs/heads/tmp-ef588ef
  Linux 4.4.113
  MIPS: AR7: ensure the port type's FCR value is used
  x86/retpoline: Optimize inline assembler for vmexit_fill_RSB
  x86/pti: Document fix wrong index
  kprobes/x86: Disable optimizing on the function jumps to indirect thunk
  kprobes/x86: Blacklist indirect thunk functions for kprobes
  retpoline: Introduce start/end markers of indirect thunk
  x86/mce: Make machine check speculation protected
  kbuild: modversions for EXPORT_SYMBOL() for asm
  x86/cpu, x86/pti: Do not enable PTI on AMD processors
  arm64: KVM: Fix SMCCC handling of unimplemented SMC/HVC calls
  dm thin metadata: THIN_MAX_CONCURRENT_LOCKS should be 6
  dm btree: fix serious bug in btree_split_beneath()
  libata: apply MAX_SEC_1024 to all LITEON EP1 series devices
  can: peak: fix potential bug in packet fragmentation
  ARM: dts: kirkwood: fix pin-muxing of MPP7 on OpenBlocks A7
  phy: work around 'phys' references to usb-nop-xceiv devices
  tracing: Fix converting enum's from the map in trace_event_eval_update()
  Input: twl4030-vibra - fix sibling-node lookup
  Input: twl6040-vibra - fix child-node lookup
  Input: twl6040-vibra - fix DT node memory management
  Input: 88pm860x-ts - fix child-node lookup
  x86/apic/vector: Fix off by one in error path
  pipe: avoid round_pipe_size() nr_pages overflow on 32-bit
  module: Add retpoline tag to VERMAGIC
  x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros
  sched/deadline: Zero out positive runtime after throttling constrained tasks
  scsi: hpsa: fix volume offline state
  af_key: fix buffer overread in parse_exthdrs()
  af_key: fix buffer overread in verify_address_len()
  ALSA: hda - Apply the existing quirk to iMac 14,1
  ALSA: hda - Apply headphone noise quirk for another Dell XPS 13 variant
  ALSA: pcm: Remove yet superfluous WARN_ON()
  futex: Prevent overflow by strengthen input validation
  scsi: sg: disable SET_FORCE_LOW_DMA
  x86/retpoline: Remove compile time warning
  x86/retpoline: Fill return stack buffer on vmexit
  x86/retpoline/irq32: Convert assembler indirect jumps
  x86/retpoline/checksum32: Convert assembler indirect jumps
  x86/retpoline/xen: Convert Xen hypercall indirect jumps
  x86/retpoline/hyperv: Convert assembler indirect jumps
  x86/retpoline/ftrace: Convert ftrace assembler indirect jumps
  x86/retpoline/entry: Convert entry assembler indirect jumps
  x86/retpoline/crypto: Convert crypto assembler indirect jumps
  x86/spectre: Add boot time option to select Spectre v2 mitigation
  x86/retpoline: Add initial retpoline support
  kconfig.h: use __is_defined() to check if MODULE is defined
  EXPORT_SYMBOL() for asm
  x86/asm: Make asm/alternative.h safe from assembly
  x86/kbuild: enable modversions for symbols exported from asm
  x86/asm: Use register variable to get stack pointer value
  x86/mm/32: Move setup_clear_cpu_cap(X86_FEATURE_PCID) earlier
  x86/cpu/AMD: Use LFENCE_RDTSC in preference to MFENCE_RDTSC
  x86/cpu/AMD: Make LFENCE a serializing instruction
  gcov: disable for COMPILE_TEST
  ANDROID: sdcardfs: Move default_normal to superblock
  blkdev: Refactoring block io latency histogram codes
  FROMLIST: arm64: kpti: Fix the interaction between ASID switching and software PAN
  FROMLIST: arm64: Move post_ttbr_update_workaround to C code
  FROMLIST: arm64: mm: Rename post_ttbr0_update_workaround
  sched: EAS: Initialize push_task as NULL to avoid direct reference on out_unlock path

Conflicts:
	arch/arm64/include/asm/efi.h
	arch/arm64/include/asm/mmu_context.h
	drivers/scsi/sg.c
	drivers/scsi/ufs/ufshcd.h

Change-Id: Ibfa06af8ef308077aad6995874d4b7b0a73e95f3
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>

1 files changed, 15 insertions, 1 deletions

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 26960e49bb8c..1235f9fd9fbd 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -2301,6 +2301,7 @@ void trace_event_enum_update(struct trace_enum_map **map, int len)
 {
 	struct trace_event_call *call, *p;
 	const char *last_system = NULL;
+	bool first = false;
 	int last_i;
 	int i;
 
@@ -2308,15 +2309,28 @@ void trace_event_enum_update(struct trace_enum_map **map, int len)
 	list_for_each_entry_safe(call, p, &ftrace_events, list) {
 		/* events are usually grouped together with systems */
 		if (!last_system || call->class->system != last_system) {
+			first = true;
 			last_i = 0;
 			last_system = call->class->system;
 		}
 
+		/*
+		 * Since calls are grouped by systems, the likelyhood that the
+		 * next call in the iteration belongs to the same system as the
+		 * previous call is high. As an optimization, we skip seaching
+		 * for a map[] that matches the call's system if the last call
+		 * was from the same system. That's what last_i is for. If the
+		 * call has the same system as the previous call, then last_i
+		 * will be the index of the first map[] that has a matching
+		 * system.
+		 */
 		for (i = last_i; i < len; i++) {
 			if (call->class->system == map[i]->system) {
 				/* Save the first system if need be */
-				if (!last_i)
+				if (first) {
 					last_i = i;
+					first = false;
+				}
 				update_event_printk(call, map[i]);
 			}
 		}