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Subject[GIT PULL] s390 patches for the 5.2 merge window #2
The following changes since commit 71ae5fc87c34ecbdca293c2a5c563d6be2576558:

Merge tag 'linux-kselftest-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest (2019-05-06 20:29:45 -0700)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux tags/s390-5.2-2

for you to fetch changes up to f3e20ad67b4c8365df9818fd3c8026e105d6b53a:

s390: move arch/s390/defconfig to arch/s390/configs/defconfig (2019-05-14 17:54:48 +0200)

----------------------------------------------------------------
s390 updates for the 5.2 merge window #2

- Enhancements for the QDIO layer

- Remove the RCP trace event

- Avoid three build issues

- Move the defconfig to the configs directory

----------------------------------------------------------------
Farhan Ali (1):
s390/cio: Remove tracing for rchp instruction

Julian Wiedmann (3):
s390/qdio: allow to scan all Output SBALs in one go
s390/qdio: use get_buf_state() in debug_get_buf_state()
s390/qdio: optimize state inspection of HW-owned SBALs

Martin Schwidefsky (1):
s390/boot: fix compiler error due to missing awk strtonum

Masahiro Yamada (1):
s390: move arch/s390/defconfig to arch/s390/configs/defconfig

Vasily Gorbik (2):
latent_entropy: avoid build error when plugin cflags are not set
s390/kasan: adapt disabled_wait usage to avoid build error

arch/s390/Makefile | 2 ++
arch/s390/boot/Makefile | 1 -
arch/s390/boot/compressed/vmlinux.lds.S | 2 ++
arch/s390/{ => configs}/defconfig | 0
arch/s390/mm/kasan_init.c | 2 +-
drivers/s390/cio/qdio_main.c | 19 +++++++++++--------
drivers/s390/cio/trace.c | 1 -
drivers/s390/cio/trace.h | 23 -----------------------
include/linux/random.h | 2 +-
9 files changed, 17 insertions(+), 35 deletions(-)
rename arch/s390/{ => configs}/defconfig (100%)

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index df1d6a1..de8521f 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -10,6 +10,8 @@
# Copyright (C) 1994 by Linus Torvalds
#

+KBUILD_DEFCONFIG := defconfig
+
LD_BFD := elf64-s390
KBUILD_LDFLAGS := -m elf64_s390
KBUILD_AFLAGS_MODULE += -fPIC
diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
index c51496b..7cba96e 100644
--- a/arch/s390/boot/Makefile
+++ b/arch/s390/boot/Makefile
@@ -58,7 +58,6 @@ define cmd_section_cmp
touch $@
endef

-OBJCOPYFLAGS_bzImage := --pad-to $$(readelf -s $(obj)/compressed/vmlinux | awk '/\<_end\>/ {print or(strtonum("0x"$$2),4095)+1}')
$(obj)/bzImage: $(obj)/compressed/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
$(call if_changed,objcopy)

diff --git a/arch/s390/boot/compressed/vmlinux.lds.S b/arch/s390/boot/compressed/vmlinux.lds.S
index 112b8d9..635217e 100644
--- a/arch/s390/boot/compressed/vmlinux.lds.S
+++ b/arch/s390/boot/compressed/vmlinux.lds.S
@@ -77,6 +77,8 @@ SECTIONS
_compressed_start = .;
*(.vmlinux.bin.compressed)
_compressed_end = .;
+ FILL(0xff);
+ . = ALIGN(4096);
}
. = ALIGN(256);
.bss : {
diff --git a/arch/s390/defconfig b/arch/s390/configs/defconfig
similarity index 100%
rename from arch/s390/defconfig
rename to arch/s390/configs/defconfig
diff --git a/arch/s390/mm/kasan_init.c b/arch/s390/mm/kasan_init.c
index 01892dc..0c1f257 100644
--- a/arch/s390/mm/kasan_init.c
+++ b/arch/s390/mm/kasan_init.c
@@ -28,7 +28,7 @@ static void __init kasan_early_panic(const char *reason)
{
sclp_early_printk("The Linux kernel failed to boot with the KernelAddressSanitizer:\n");
sclp_early_printk(reason);
- disabled_wait(0);
+ disabled_wait();
}

static void * __init kasan_early_alloc_segment(void)
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index cfce255..7b7620d 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -205,17 +205,22 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
int auto_ack, int merge_pending)
{
unsigned char __state = 0;
- int i;
+ int i = 1;

if (is_qebsm(q))
return qdio_do_eqbs(q, state, bufnr, count, auto_ack);

/* get initial state: */
__state = q->slsb.val[bufnr];
+
+ /* Bail out early if there is no work on the queue: */
+ if (__state & SLSB_OWNER_CU)
+ goto out;
+
if (merge_pending && __state == SLSB_P_OUTPUT_PENDING)
__state = SLSB_P_OUTPUT_EMPTY;

- for (i = 1; i < count; i++) {
+ for (; i < count; i++) {
bufnr = next_buf(bufnr);

/* merge PENDING into EMPTY: */
@@ -228,6 +233,8 @@ static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
if (q->slsb.val[bufnr] != __state)
break;
}
+
+out:
*state = __state;
return i;
}
@@ -382,7 +389,7 @@ int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
{
if (need_siga_sync(q))
qdio_siga_sync_q(q);
- return get_buf_states(q, bufnr, state, 1, 0, 0);
+ return get_buf_state(q, bufnr, state, 0);
}

static inline void qdio_stop_polling(struct qdio_q *q)
@@ -719,11 +726,7 @@ static int get_outbound_buffer_frontier(struct qdio_q *q, unsigned int start)
multicast_outbound(q)))
qdio_siga_sync_q(q);

- /*
- * Don't check 128 buffers, as otherwise qdio_inbound_q_moved
- * would return 0.
- */
- count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
+ count = atomic_read(&q->nr_buf_used);
if (!count)
return 0;

diff --git a/drivers/s390/cio/trace.c b/drivers/s390/cio/trace.c
index e331cd9..882ee53 100644
--- a/drivers/s390/cio/trace.c
+++ b/drivers/s390/cio/trace.c
@@ -21,5 +21,4 @@ EXPORT_TRACEPOINT_SYMBOL(s390_cio_csch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_hsch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_xsch);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_rsch);
-EXPORT_TRACEPOINT_SYMBOL(s390_cio_rchp);
EXPORT_TRACEPOINT_SYMBOL(s390_cio_chsc);
diff --git a/drivers/s390/cio/trace.h b/drivers/s390/cio/trace.h
index 0ebb29b..4803139 100644
--- a/drivers/s390/cio/trace.h
+++ b/drivers/s390/cio/trace.h
@@ -274,29 +274,6 @@ DEFINE_EVENT(s390_class_schid, s390_cio_rsch,
TP_ARGS(schid, cc)
);

-/**
- * s390_cio_rchp - Reset Channel Path (RCHP) instruction was performed
- * @chpid: Channel-Path Identifier
- * @cc: Condition code
- */
-TRACE_EVENT(s390_cio_rchp,
- TP_PROTO(struct chp_id chpid, int cc),
- TP_ARGS(chpid, cc),
- TP_STRUCT__entry(
- __field(u8, cssid)
- __field(u8, id)
- __field(int, cc)
- ),
- TP_fast_assign(
- __entry->cssid = chpid.cssid;
- __entry->id = chpid.id;
- __entry->cc = cc;
- ),
- TP_printk("chpid=%x.%02x cc=%d", __entry->cssid, __entry->id,
- __entry->cc
- )
-);
-
#define CHSC_MAX_REQUEST_LEN 64
#define CHSC_MAX_RESPONSE_LEN 64

diff --git a/include/linux/random.h b/include/linux/random.h
index 445a0ea..d4eb9b3 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -20,7 +20,7 @@ struct random_ready_callback {

extern void add_device_randomness(const void *, unsigned int);

-#if defined(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) && !defined(__CHECKER__)
+#if defined(LATENT_ENTROPY_PLUGIN) && !defined(__CHECKER__)
static inline void add_latent_entropy(void)
{
add_device_randomness((const void *)&latent_entropy,
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