Merge 45dfb8a565 ("Merge tag 'task_work-2021-01-19' of git://git.kernel.dk/linux-block") into android-mainline

Steps on the way to 5.11-rc5

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I76e4c995f376700bc62d40de1b4c3e127e7d4929

arch/ia64/include/asm/sparsemem.h

@@ -3,6 +3,7 @@
 #define _ASM_IA64_SPARSEMEM_H
 
 #ifdef CONFIG_SPARSEMEM
+#include <asm/page.h>
 /*
  * SECTION_SIZE_BITS            2^N: how big each section will be
  * MAX_PHYSMEM_BITS             2^N: how much memory we can have in that space

arch/x86/hyperv/hv_init.c

@@ -315,6 +315,25 @@ static struct syscore_ops hv_syscore_ops = {
 	.resume		= hv_resume,
 };
 
+static void (* __initdata old_setup_percpu_clockev)(void);
+
+static void __init hv_stimer_setup_percpu_clockev(void)
+{
+	/*
+	 * Ignore any errors in setting up stimer clockevents
+	 * as we can run with the LAPIC timer as a fallback.
+	 */
+	(void)hv_stimer_alloc();
+
+	/*
+	 * Still register the LAPIC timer, because the direct-mode STIMER is
+	 * not supported by old versions of Hyper-V. This also allows users
+	 * to switch to LAPIC timer via /sys, if they want to.
+	 */
+	if (old_setup_percpu_clockev)
+		old_setup_percpu_clockev();
+}
+
 /*
  * This function is to be invoked early in the boot sequence after the
  * hypervisor has been detected.
@@ -393,10 +412,14 @@ void __init hyperv_init(void)
 	wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
 
 	/*
-	 * Ignore any errors in setting up stimer clockevents
-	 * as we can run with the LAPIC timer as a fallback.
+	 * hyperv_init() is called before LAPIC is initialized: see
+	 * apic_intr_mode_init() -> x86_platform.apic_post_init() and
+	 * apic_bsp_setup() -> setup_local_APIC(). The direct-mode STIMER
+	 * depends on LAPIC, so hv_stimer_alloc() should be called from
+	 * x86_init.timers.setup_percpu_clockev.
 	 */
-	(void)hv_stimer_alloc();
+	old_setup_percpu_clockev = x86_init.timers.setup_percpu_clockev;
+	x86_init.timers.setup_percpu_clockev = hv_stimer_setup_percpu_clockev;
 
 	hv_apic_init();
 

crypto/xor.c

@@ -107,6 +107,8 @@ do_xor_speed(struct xor_block_template *tmpl, void *b1, void *b2)
 	preempt_enable();
 
 	// bytes/ns == GB/s, multiply by 1000 to get MB/s [not MiB/s]
+	if (!min)
+		min = 1;
 	speed = (1000 * REPS * BENCH_SIZE) / (unsigned int)ktime_to_ns(min);
 	tmpl->speed = speed;
 

drivers/crypto/Kconfig

@@ -366,6 +366,7 @@ if CRYPTO_DEV_OMAP
 config CRYPTO_DEV_OMAP_SHAM
 	tristate "Support for OMAP MD5/SHA1/SHA2 hw accelerator"
 	depends on ARCH_OMAP2PLUS
+	select CRYPTO_ENGINE
 	select CRYPTO_SHA1
 	select CRYPTO_MD5
 	select CRYPTO_SHA256

drivers/spi/spi-cadence.c

@@ -115,6 +115,7 @@ struct cdns_spi {
 	void __iomem *regs;
 	struct clk *ref_clk;
 	struct clk *pclk;
+	unsigned int clk_rate;
 	u32 speed_hz;
 	const u8 *txbuf;
 	u8 *rxbuf;
@@ -250,7 +251,7 @@ static void cdns_spi_config_clock_freq(struct spi_device *spi,
 	u32 ctrl_reg, baud_rate_val;
 	unsigned long frequency;
 
-	frequency = clk_get_rate(xspi->ref_clk);
+	frequency = xspi->clk_rate;
 
 	ctrl_reg = cdns_spi_read(xspi, CDNS_SPI_CR);
 
@@ -558,8 +559,9 @@ static int cdns_spi_probe(struct platform_device *pdev)
 	master->auto_runtime_pm = true;
 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
 
+	xspi->clk_rate = clk_get_rate(xspi->ref_clk);
 	/* Set to default valid value */
-	master->max_speed_hz = clk_get_rate(xspi->ref_clk) / 4;
+	master->max_speed_hz = xspi->clk_rate / 4;
 	xspi->speed_hz = master->max_speed_hz;
 
 	master->bits_per_word_mask = SPI_BPW_MASK(8);

drivers/spi/spi-fsl-spi.c

@@ -115,14 +115,13 @@ static void fsl_spi_chipselect(struct spi_device *spi, int value)
 {
 	struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
 	struct fsl_spi_platform_data *pdata;
-	bool pol = spi->mode & SPI_CS_HIGH;
 	struct spi_mpc8xxx_cs	*cs = spi->controller_state;
 
 	pdata = spi->dev.parent->parent->platform_data;
 
 	if (value == BITBANG_CS_INACTIVE) {
 		if (pdata->cs_control)
-			pdata->cs_control(spi, !pol);
+			pdata->cs_control(spi, false);
 	}
 
 	if (value == BITBANG_CS_ACTIVE) {
@@ -134,7 +133,7 @@ static void fsl_spi_chipselect(struct spi_device *spi, int value)
 		fsl_spi_change_mode(spi);
 
 		if (pdata->cs_control)
-			pdata->cs_control(spi, pol);
+			pdata->cs_control(spi, true);
 	}
 }
 

fs/nfsd/nfs3xdr.c

@@ -865,9 +865,14 @@ compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
 	if (isdotent(name, namlen)) {
 		if (namlen == 2) {
 			dchild = dget_parent(dparent);
-			/* filesystem root - cannot return filehandle for ".." */
+			/*
+			 * Don't return filehandle for ".." if we're at
+			 * the filesystem or export root:
+			 */
 			if (dchild == dparent)
 				goto out;
+			if (dparent == exp->ex_path.dentry)
+				goto out;
 		} else
 			dchild = dget(dparent);
 	} else

include/trace/events/sunrpc.h

@@ -1424,13 +1424,13 @@ TRACE_EVENT(rpcb_unregister,
 	)
 );
 
-DECLARE_EVENT_CLASS(svc_xdr_buf_class,
+/* Record an xdr_buf containing a fully-formed RPC message */
+DECLARE_EVENT_CLASS(svc_xdr_msg_class,
 	TP_PROTO(
-		const struct svc_rqst *rqst,
 		const struct xdr_buf *xdr
 	),
 
-	TP_ARGS(rqst, xdr),
+	TP_ARGS(xdr),
 
 	TP_STRUCT__entry(
 		__field(u32, xid)
@@ -1443,7 +1443,55 @@ DECLARE_EVENT_CLASS(svc_xdr_buf_class,
 	),
 
 	TP_fast_assign(
-		__entry->xid = be32_to_cpu(rqst->rq_xid);
+		__be32 *p = (__be32 *)xdr->head[0].iov_base;
+
+		__entry->xid = be32_to_cpu(*p);
+		__entry->head_base = p;
+		__entry->head_len = xdr->head[0].iov_len;
+		__entry->tail_base = xdr->tail[0].iov_base;
+		__entry->tail_len = xdr->tail[0].iov_len;
+		__entry->page_len = xdr->page_len;
+		__entry->msg_len = xdr->len;
+	),
+
+	TP_printk("xid=0x%08x head=[%p,%zu] page=%u tail=[%p,%zu] len=%u",
+		__entry->xid,
+		__entry->head_base, __entry->head_len, __entry->page_len,
+		__entry->tail_base, __entry->tail_len, __entry->msg_len
+	)
+);
+
+#define DEFINE_SVCXDRMSG_EVENT(name)					\
+		DEFINE_EVENT(svc_xdr_msg_class,				\
+				svc_xdr_##name,				\
+				TP_PROTO(				\
+					const struct xdr_buf *xdr	\
+				),					\
+				TP_ARGS(xdr))
+
+DEFINE_SVCXDRMSG_EVENT(recvfrom);
+
+/* Record an xdr_buf containing arbitrary data, tagged with an XID */
+DECLARE_EVENT_CLASS(svc_xdr_buf_class,
+	TP_PROTO(
+		__be32 xid,
+		const struct xdr_buf *xdr
+	),
+
+	TP_ARGS(xid, xdr),
+
+	TP_STRUCT__entry(
+		__field(u32, xid)
+		__field(const void *, head_base)
+		__field(size_t, head_len)
+		__field(const void *, tail_base)
+		__field(size_t, tail_len)
+		__field(unsigned int, page_len)
+		__field(unsigned int, msg_len)
+	),
+
+	TP_fast_assign(
+		__entry->xid = be32_to_cpu(xid);
 		__entry->head_base = xdr->head[0].iov_base;
 		__entry->head_len = xdr->head[0].iov_len;
 		__entry->tail_base = xdr->tail[0].iov_base;
@@ -1463,12 +1511,11 @@ DECLARE_EVENT_CLASS(svc_xdr_buf_class,
 		DEFINE_EVENT(svc_xdr_buf_class,				\
 				svc_xdr_##name,				\
 				TP_PROTO(				\
-					const struct svc_rqst *rqst,	\
+					__be32 xid,			\
 					const struct xdr_buf *xdr	\
 				),					\
-				TP_ARGS(rqst, xdr))
+				TP_ARGS(xid, xdr))
 
-DEFINE_SVCXDRBUF_EVENT(recvfrom);
 DEFINE_SVCXDRBUF_EVENT(sendto);
 
 /*

kernel/signal.c

@@ -2551,6 +2551,9 @@ bool get_signal(struct ksignal *ksig)
 	struct signal_struct *signal = current->signal;
 	int signr;
 
+	if (unlikely(current->task_works))
+		task_work_run();
+
 	/*
 	 * For non-generic architectures, check for TIF_NOTIFY_SIGNAL so
 	 * that the arch handlers don't all have to do it. If we get here

net/sunrpc/svc_xprt.c

@@ -857,6 +857,7 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
 	err = -EAGAIN;
 	if (len <= 0)
 		goto out_release;
+	trace_svc_xdr_recvfrom(&rqstp->rq_arg);
 
 	clear_bit(XPT_OLD, &xprt->xpt_flags);
 
@@ -866,7 +867,6 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
 
 	if (serv->sv_stats)
 		serv->sv_stats->netcnt++;
-	trace_svc_xdr_recvfrom(rqstp, &rqstp->rq_arg);
 	return len;
 out_release:
 	rqstp->rq_res.len = 0;
@@ -904,7 +904,7 @@ int svc_send(struct svc_rqst *rqstp)
 	xb->len = xb->head[0].iov_len +
 		xb->page_len +
 		xb->tail[0].iov_len;
-	trace_svc_xdr_sendto(rqstp, xb);
+	trace_svc_xdr_sendto(rqstp->rq_xid, xb);
 	trace_svc_stats_latency(rqstp);
 
 	len = xprt->xpt_ops->xpo_sendto(rqstp);