[ANNOUNCE] v5.11-rt6

From: Sebastian Andrzej Siewior
Date: Thu Feb 18 2021 - 15:13:37 EST

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Dear RT folks!

I'm pleased to announce the v5.11-rt6 patch set.

Changes since v5.11-rt5:

- Updated the "tracing: Merge irqflags + preempt counter." patch to
the version Steven posted for upstream inclusion.

- Due to tracing rework, the 'L' marker (for need resched lazy) got
lost and is now back.

- The patch for the zsmalloc/zswap regression in v5.11 got updated to
v2 as posted by Barry Song.

- A kcov enabled kernel did not compile with PREEMPT_RT enabled.

Known issues
- kdb/kgdb can easily deadlock.
- kmsg dumpers expecting not to be called in parallel can clobber
their temp buffer.
- netconsole triggers WARN.

The delta patch against v5.11-rt5 is appended below and can be found here:

https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.11/incr/patch-5.11-rt5-rt6.patch.xz

You can get this release via the git tree at:

git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git v5.11-rt6

The RT patch against v5.11 can be found here:

https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.11/older/patch-5.11-rt6.patch.xz

The split quilt queue is available at:

https://cdn.kernel.org/pub/linux/kernel/projects/rt/5.11/older/patches-5.11-rt6.tar.xz

Sebastian

diff --git a/include/linux/kcov.h b/include/linux/kcov.h
index 4e3037dc12048..55dc338f6bcdd 100644
--- a/include/linux/kcov.h
+++ b/include/linux/kcov.h
@@ -2,6 +2,7 @@
#ifndef _LINUX_KCOV_H
#define _LINUX_KCOV_H

+#include <linux/sched.h>
#include <uapi/linux/kcov.h>

struct task_struct;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 7337630326751..183e9d90841cb 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -14,7 +14,6 @@
#include <linux/pid.h>
#include <linux/sem.h>
#include <linux/shm.h>
-#include <linux/kcov.h>
#include <linux/mutex.h>
#include <linux/plist.h>
#include <linux/hrtimer.h>
diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index 5d08fb467f69a..89c3f7162267b 100644
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -162,9 +162,58 @@ static inline void tracing_generic_entry_update(struct trace_entry *entry,
entry->flags = trace_ctx >> 24;
}

-unsigned int _tracing_gen_ctx_flags(unsigned long irqflags);
-unsigned int tracing_gen_ctx_flags(void);
-unsigned int tracing_gen_ctx_flags_dect(void);
+unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status);
+
+enum trace_flag_type {
+ TRACE_FLAG_IRQS_OFF = 0x01,
+ TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
+ TRACE_FLAG_NEED_RESCHED = 0x04,
+ TRACE_FLAG_HARDIRQ = 0x08,
+ TRACE_FLAG_SOFTIRQ = 0x10,
+ TRACE_FLAG_PREEMPT_RESCHED = 0x20,
+ TRACE_FLAG_NMI = 0x40,
+ TRACE_FLAG_NEED_RESCHED_LAZY = 0x80,
+};
+
+#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
+static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
+{
+ unsigned int irq_status = irqs_disabled_flags(irqflags) ?
+ TRACE_FLAG_IRQS_OFF : 0;
+ return tracing_gen_ctx_irq_test(irq_status);
+}
+static inline unsigned int tracing_gen_ctx(void)
+{
+ unsigned long irqflags;
+
+ local_save_flags(irqflags);
+ return tracing_gen_ctx_flags(irqflags);
+}
+#else
+
+static inline unsigned int tracing_gen_ctx_flags(unsigned long irqflags)
+{
+ return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
+}
+static inline unsigned int tracing_gen_ctx(void)
+{
+ return tracing_gen_ctx_irq_test(TRACE_FLAG_IRQS_NOSUPPORT);
+}
+#endif
+
+static inline unsigned int tracing_gen_ctx_dec(void)
+{
+ unsigned int trace_ctx;
+
+ trace_ctx = tracing_gen_ctx();
+ /*
+ * Subtract one from the preeption counter if preemption is enabled,
+ * see trace_event_buffer_reserve()for details.
+ */
+ if (IS_ENABLED(CONFIG_PREEMPTION))
+ trace_ctx--;
+ return trace_ctx;
+}

struct trace_event_file;

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index f5c4f1d72a885..c54eae2ab208c 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -79,7 +79,7 @@ static void trace_note(struct blk_trace *bt, pid_t pid, int action,

if (blk_tracer) {
buffer = blk_tr->array_buffer.buffer;
- trace_ctx = _tracing_gen_ctx_flags(0);
+ trace_ctx = tracing_gen_ctx_flags(0);
event = trace_buffer_lock_reserve(buffer, TRACE_BLK,
sizeof(*t) + len + cgid_len,
trace_ctx);
@@ -253,7 +253,7 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
tracing_record_cmdline(current);

buffer = blk_tr->array_buffer.buffer;
- trace_ctx = _tracing_gen_ctx_flags(0);
+ trace_ctx = tracing_gen_ctx_flags(0);
event = trace_buffer_lock_reserve(buffer, TRACE_BLK,
sizeof(*t) + pdu_len + cgid_len,
trace_ctx);
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index ed515daacd568..e33e7bad3fac1 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1018,7 +1018,7 @@ int __trace_puts(unsigned long ip, const char *str, int size)

alloc = sizeof(*entry) + size + 2; /* possible \n added */

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();
buffer = global_trace.array_buffer.buffer;
ring_buffer_nest_start(buffer);
event = __trace_buffer_lock_reserve(buffer, TRACE_PRINT, alloc,
@@ -1068,7 +1068,7 @@ int __trace_bputs(unsigned long ip, const char *str)
if (unlikely(tracing_selftest_running || tracing_disabled))
return 0;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();
buffer = global_trace.array_buffer.buffer;

ring_buffer_nest_start(buffer);
@@ -2587,20 +2587,13 @@ static unsigned short migration_disable_value(void)
#endif
}

-unsigned int _tracing_gen_ctx_flags(unsigned long irqflags)
+unsigned int tracing_gen_ctx_irq_test(unsigned int irqs_status)
{
- unsigned int trace_flags = 0;
+ unsigned int trace_flags = irqs_status;
unsigned int pc;

pc = preempt_count();

-#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
- if (irqs_disabled_flags(irqflags))
- trace_flags |= TRACE_FLAG_IRQS_OFF;
-#else
- trace_flags |= TRACE_FLAG_IRQS_NOSUPPORT;
-#endif
-
if (pc & NMI_MASK)
trace_flags |= TRACE_FLAG_NMI;
if (pc & HARDIRQ_MASK)
@@ -2613,39 +2606,17 @@ unsigned int _tracing_gen_ctx_flags(unsigned long irqflags)
if (test_preempt_need_resched())
trace_flags |= TRACE_FLAG_PREEMPT_RESCHED;

+#ifdef CONFIG_PREEMPT_LAZY
+ if (need_resched_lazy())
+ trace_flags |= TRACE_FLAG_NEED_RESCHED_LAZY;
+#endif
+
return (pc & 0xff) |
(migration_disable_value() & 0xff) << 8 |
(preempt_lazy_count() & 0xff) << 16 |
(trace_flags << 24);
}

-unsigned int tracing_gen_ctx_flags(void)
-{
- unsigned long irqflags;
-
-#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
- local_save_flags(irqflags);
-#else
- irqflags = 0;
-#endif
- return _tracing_gen_ctx_flags(irqflags);
-}
-
-unsigned int tracing_gen_ctx_flags_dect(void)
-{
- unsigned int trace_ctx;
-
- trace_ctx = tracing_gen_ctx_flags();
-
- /*
- * Subtract one from the preeption counter if preemption is enabled,
- * see trace_event_buffer_reserve()for details.
- */
- if (IS_ENABLED(CONFIG_PREEMPTION))
- trace_ctx--;
- return trace_ctx;
-}
-
struct ring_buffer_event *
trace_buffer_lock_reserve(struct trace_buffer *buffer,
int type,
@@ -3090,7 +3061,7 @@ void trace_dump_stack(int skip)
skip++;
#endif
__ftrace_trace_stack(global_trace.array_buffer.buffer,
- tracing_gen_ctx_flags(), skip, NULL);
+ tracing_gen_ctx(), skip, NULL);
}
EXPORT_SYMBOL_GPL(trace_dump_stack);

@@ -3286,7 +3257,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
/* Don't pollute graph traces with trace_vprintk internals */
pause_graph_tracing();

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();
preempt_disable_notrace();

tbuffer = get_trace_buf();
@@ -3348,7 +3319,7 @@ __trace_array_vprintk(struct trace_buffer *buffer,
/* Don't pollute graph traces with trace_vprintk internals */
pause_graph_tracing();

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();
preempt_disable_notrace();

@@ -6718,7 +6689,7 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,

buffer = tr->array_buffer.buffer;
event = __trace_buffer_lock_reserve(buffer, TRACE_PRINT, size,
- tracing_gen_ctx_flags());
+ tracing_gen_ctx());
if (unlikely(!event))
/* Ring buffer disabled, return as if not open for write */
return -EBADF;
@@ -6797,7 +6768,7 @@ tracing_mark_raw_write(struct file *filp, const char __user *ubuf,

buffer = tr->array_buffer.buffer;
event = __trace_buffer_lock_reserve(buffer, TRACE_RAW_DATA, size,
- tracing_gen_ctx_flags());
+ tracing_gen_ctx());
if (!event)
/* Ring buffer disabled, return as if not open for write */
return -EBADF;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index b687e98fcbe10..93fb08ab8bb6b 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -136,27 +136,6 @@ struct kretprobe_trace_entry_head {
unsigned long ret_ip;
};

-/*
- * trace_flag_type is an enumeration that holds different
- * states when a trace occurs. These are:
- * IRQS_OFF - interrupts were disabled
- * IRQS_NOSUPPORT - arch does not support irqs_disabled_flags
- * NEED_RESCHED - reschedule is requested
- * HARDIRQ - inside an interrupt handler
- * SOFTIRQ - inside a softirq handler
- * NEED_RESCHED_LAZY - lazy reschedule is requested
- */
-enum trace_flag_type {
- TRACE_FLAG_IRQS_OFF = 0x01,
- TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
- TRACE_FLAG_NEED_RESCHED = 0x04,
- TRACE_FLAG_HARDIRQ = 0x08,
- TRACE_FLAG_SOFTIRQ = 0x10,
- TRACE_FLAG_PREEMPT_RESCHED = 0x20,
- TRACE_FLAG_NMI = 0x40,
- TRACE_FLAG_NEED_RESCHED_LAZY = 0x80,
-};
-
#define TRACE_BUF_SIZE 1024

struct trace_array;
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
index a95b7f1fa351c..e47fdb4c92fbc 100644
--- a/kernel/trace/trace_branch.c
+++ b/kernel/trace/trace_branch.c
@@ -59,7 +59,7 @@ probe_likely_condition(struct ftrace_likely_data *f, int val, int expect)
if (atomic_read(&data->disabled))
goto out;

- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);
buffer = tr->array_buffer.buffer;
event = trace_buffer_lock_reserve(buffer, TRACE_BRANCH,
sizeof(*entry), trace_ctx);
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index 5e64b06ab5189..288ad2c274fba 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -422,7 +422,7 @@ void perf_trace_buf_update(void *record, u16 type)
{
struct trace_entry *entry = record;

- tracing_generic_entry_update(entry, type, tracing_gen_ctx_flags());
+ tracing_generic_entry_update(entry, type, tracing_gen_ctx());
}
NOKPROBE_SYMBOL(perf_trace_buf_update);

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 95a544899ddd0..a7c176251c637 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -266,7 +266,7 @@ void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer,
* interested in the preempt_count at the time the tracepoint was
* hit, we need to subtract one to offset the increment.
*/
- fbuffer->trace_ctx = tracing_gen_ctx_flags_dect();
+ fbuffer->trace_ctx = tracing_gen_ctx_dec();
fbuffer->trace_file = trace_file;

fbuffer->event =
@@ -3682,7 +3682,7 @@ function_test_events_call(unsigned long ip, unsigned long parent_ip,
long disabled;
int cpu;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();
preempt_disable_notrace();
cpu = raw_smp_processor_id();
disabled = atomic_inc_return(&per_cpu(ftrace_test_event_disable, cpu));
diff --git a/kernel/trace/trace_events_inject.c b/kernel/trace/trace_events_inject.c
index 65150c0a5e7af..c188045c5f976 100644
--- a/kernel/trace/trace_events_inject.c
+++ b/kernel/trace/trace_events_inject.c
@@ -203,7 +203,7 @@ static int parse_entry(char *str, struct trace_event_call *call, void **pentry)
return -ENOMEM;

tracing_generic_entry_update(entry, call->event.type,
- tracing_gen_ctx_flags());
+ tracing_gen_ctx());

while ((len = parse_field(str, call, &field, &val)) > 0) {
if (is_function_field(field))
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 31183dc3ba973..9bb03ab44fffc 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -143,7 +143,7 @@ function_trace_call(unsigned long ip, unsigned long parent_ip,
if (bit < 0)
return;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();
preempt_disable_notrace();

cpu = smp_processor_id();
@@ -197,7 +197,7 @@ function_stack_trace_call(unsigned long ip, unsigned long parent_ip,
disabled = atomic_inc_return(&data->disabled);

if (likely(disabled == 1)) {
- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);
trace_function(tr, ip, parent_ip, trace_ctx);
__trace_stack(tr, trace_ctx, STACK_SKIP);
}
@@ -404,7 +404,7 @@ static __always_inline void trace_stack(struct trace_array *tr)
{
unsigned int trace_ctx;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();

__trace_stack(tr, trace_ctx, FTRACE_STACK_SKIP);
}
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 83d6be491d468..0aa6e6faa9439 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -173,7 +173,7 @@ int trace_graph_entry(struct ftrace_graph_ent *trace)
data = per_cpu_ptr(tr->array_buffer.data, cpu);
disabled = atomic_inc_return(&data->disabled);
if (likely(disabled == 1)) {
- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);
ret = __trace_graph_entry(tr, trace, trace_ctx);
} else {
ret = 0;
@@ -253,7 +253,7 @@ void trace_graph_return(struct ftrace_graph_ret *trace)
data = per_cpu_ptr(tr->array_buffer.data, cpu);
disabled = atomic_inc_return(&data->disabled);
if (likely(disabled == 1)) {
- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);
__trace_graph_return(tr, trace, trace_ctx);
}
atomic_dec(&data->disabled);
diff --git a/kernel/trace/trace_hwlat.c b/kernel/trace/trace_hwlat.c
index 375e7635baf67..34dc1a712dcbb 100644
--- a/kernel/trace/trace_hwlat.c
+++ b/kernel/trace/trace_hwlat.c
@@ -110,7 +110,7 @@ static void trace_hwlat_sample(struct hwlat_sample *sample)
struct hwlat_entry *entry;

event = trace_buffer_lock_reserve(buffer, TRACE_HWLAT, sizeof(*entry),
- tracing_gen_ctx_flags());
+ tracing_gen_ctx());
if (!event)
return;
entry = ring_buffer_event_data(event);
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 56e5ad7240333..590b3d51afae9 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -148,7 +148,7 @@ irqsoff_tracer_call(unsigned long ip, unsigned long parent_ip,
if (!func_prolog_dec(tr, &data, &flags))
return;

- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);

trace_function(tr, ip, parent_ip, trace_ctx);

@@ -198,7 +198,7 @@ static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
if (!func_prolog_dec(tr, &data, &flags))
return 0;

- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);
ret = __trace_graph_entry(tr, trace, trace_ctx);
atomic_dec(&data->disabled);

@@ -217,7 +217,7 @@ static void irqsoff_graph_return(struct ftrace_graph_ret *trace)
if (!func_prolog_dec(tr, &data, &flags))
return;

- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);
__trace_graph_return(tr, trace, trace_ctx);
atomic_dec(&data->disabled);
}
@@ -331,7 +331,7 @@ check_critical_timing(struct trace_array *tr,
T1 = ftrace_now(cpu);
delta = T1-T0;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();

if (!report_latency(tr, delta))
goto out;
@@ -393,7 +393,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
data->preempt_timestamp = ftrace_now(cpu);
data->critical_start = parent_ip ? : ip;

- __trace_function(tr, ip, parent_ip, tracing_gen_ctx_flags());
+ __trace_function(tr, ip, parent_ip, tracing_gen_ctx());

per_cpu(tracing_cpu, cpu) = 1;

@@ -426,7 +426,7 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip)

atomic_inc(&data->disabled);

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();
__trace_function(tr, ip, parent_ip, trace_ctx);
check_critical_timing(tr, data, parent_ip ? : ip, cpu);
data->critical_start = 0;
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 86dda18fa09b2..f6c459aba8a61 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1386,7 +1386,7 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
if (trace_trigger_soft_disabled(trace_file))
return;

- fbuffer.trace_ctx = tracing_gen_ctx_flags();
+ fbuffer.trace_ctx = tracing_gen_ctx();
fbuffer.trace_file = trace_file;

dsize = __get_data_size(&tk->tp, regs);
@@ -1433,7 +1433,7 @@ __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri,
if (trace_trigger_soft_disabled(trace_file))
return;

- fbuffer.trace_ctx = tracing_gen_ctx_flags();
+ fbuffer.trace_ctx = tracing_gen_ctx();
fbuffer.trace_file = trace_file;

dsize = __get_data_size(&tk->tp, regs);
diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index 5a7d37bf6888c..7221ae0b4c477 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -302,7 +302,7 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
struct trace_mmiotrace_rw *entry;
unsigned int trace_ctx;

- trace_ctx = _tracing_gen_ctx_flags(0);
+ trace_ctx = tracing_gen_ctx_flags(0);
event = trace_buffer_lock_reserve(buffer, TRACE_MMIO_RW,
sizeof(*entry), trace_ctx);
if (!event) {
@@ -333,7 +333,7 @@ static void __trace_mmiotrace_map(struct trace_array *tr,
struct trace_mmiotrace_map *entry;
unsigned int trace_ctx;

- trace_ctx = _tracing_gen_ctx_flags(0);
+ trace_ctx = tracing_gen_ctx_flags(0);
event = trace_buffer_lock_reserve(buffer, TRACE_MMIO_MAP,
sizeof(*entry), trace_ctx);
if (!event) {
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 8c7d0650a9ba9..e5778d1d7a5b6 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -75,7 +75,7 @@ func_prolog_preempt_disable(struct trace_array *tr,
if (likely(!wakeup_task))
return 0;

- *trace_ctx = tracing_gen_ctx_flags();
+ *trace_ctx = tracing_gen_ctx();
preempt_disable_notrace();

cpu = raw_smp_processor_id();
@@ -459,7 +459,7 @@ probe_wakeup_sched_switch(void *ignore, bool preempt,
goto out;

local_irq_save(flags);
- trace_ctx = _tracing_gen_ctx_flags(flags);
+ trace_ctx = tracing_gen_ctx_flags(flags);

arch_spin_lock(&wakeup_lock);

@@ -550,7 +550,7 @@ probe_wakeup(void *ignore, struct task_struct *p)
if (unlikely(disabled != 1))
goto out;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();

/* interrupts should be off from try_to_wake_up */
arch_spin_lock(&wakeup_lock);
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 71a2e705970f0..8bfcd3b094226 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -321,7 +321,7 @@ static void ftrace_syscall_enter(void *data, struct pt_regs *regs, long id)

size = sizeof(*entry) + sizeof(unsigned long) * sys_data->nb_args;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();

buffer = tr->array_buffer.buffer;
event = trace_buffer_lock_reserve(buffer,
@@ -365,7 +365,7 @@ static void ftrace_syscall_exit(void *data, struct pt_regs *regs, long ret)
if (!sys_data)
return;

- trace_ctx = tracing_gen_ctx_flags();
+ trace_ctx = tracing_gen_ctx();

buffer = tr->array_buffer.buffer;
event = trace_buffer_lock_reserve(buffer,
diff --git a/localversion-rt b/localversion-rt
index 0efe7ba1930e1..8fc605d806670 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt5
+-rt6
diff --git a/mm/zswap.c b/mm/zswap.c
index 67d4555491b03..1566cc3ab7f46 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -935,7 +935,7 @@ static int zswap_writeback_entry(struct zpool *pool, unsigned long handle)
struct scatterlist input, output;
struct crypto_acomp_ctx *acomp_ctx;

- u8 *src, *tmp;
+ u8 *src, *tmp = NULL;
unsigned int dlen;
int ret;
struct writeback_control wbc = {
@@ -943,8 +943,7 @@ static int zswap_writeback_entry(struct zpool *pool, unsigned long handle)
};

if (!zpool_can_sleep_mapped(pool)) {
-
- tmp = kmalloc(entry->length, GFP_ATOMIC);
+ tmp = kmalloc(PAGE_SIZE, GFP_ATOMIC);
if (!tmp)
return -ENOMEM;
}
@@ -962,6 +961,7 @@ static int zswap_writeback_entry(struct zpool *pool, unsigned long handle)
/* entry was invalidated */
spin_unlock(&tree->lock);
zpool_unmap_handle(pool, handle);
+ kfree(tmp);
return 0;
}
spin_unlock(&tree->lock);
@@ -1272,6 +1272,7 @@ static int zswap_frontswap_load(unsigned type, pgoff_t offset,
dst = kmap_atomic(page);
zswap_fill_page(dst, entry->value);
kunmap_atomic(dst);
+ ret = 0;
goto freeentry;
}

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 785daff48030d..e64d0a2e21c31 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -60,6 +60,7 @@
#include <linux/prefetch.h>
#include <linux/if_vlan.h>
#include <linux/mpls.h>
+#include <linux/kcov.h>

#include <net/protocol.h>
#include <net/dst.h>
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index b31417f40bd56..39943c33abbfa 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -15,6 +15,7 @@
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
+#include <linux/kcov.h>
#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>
#include "ieee80211_i.h"
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 972895e9f22dc..3527b17f235a8 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -17,6 +17,7 @@
#include <linux/etherdevice.h>
#include <linux/rcupdate.h>
#include <linux/export.h>
+#include <linux/kcov.h>
#include <linux/bitops.h>
#include <net/mac80211.h>
#include <net/ieee80211_radiotap.h>

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