Re: Linux 3.0.74

From: Greg KH
Date: Wed Apr 17 2013 - 02:46:54 EST


diff --git a/Makefile b/Makefile
index f82a70f..71e8efa 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
VERSION = 3
PATCHLEVEL = 0
-SUBLEVEL = 73
+SUBLEVEL = 74
EXTRAVERSION =
NAME = Sneaky Weasel

diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index ebbc4d8..2fdfe31 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -731,7 +731,10 @@ static inline void arch_leave_lazy_mmu_mode(void)
PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave);
}

-void arch_flush_lazy_mmu_mode(void);
+static inline void arch_flush_lazy_mmu_mode(void)
+{
+ PVOP_VCALL0(pv_mmu_ops.lazy_mode.flush);
+}

static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
phys_addr_t phys, pgprot_t flags)
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 8288509..4b67ec9 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -85,6 +85,7 @@ struct pv_lazy_ops {
/* Set deferred update mode, used for batching operations. */
void (*enter)(void);
void (*leave)(void);
+ void (*flush)(void);
};

struct pv_time_ops {
@@ -673,6 +674,7 @@ void paravirt_end_context_switch(struct task_struct *next);

void paravirt_enter_lazy_mmu(void);
void paravirt_leave_lazy_mmu(void);
+void paravirt_flush_lazy_mmu(void);

void _paravirt_nop(void);
u32 _paravirt_ident_32(u32);
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 869e1ae..704faba 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -253,6 +253,18 @@ void paravirt_leave_lazy_mmu(void)
leave_lazy(PARAVIRT_LAZY_MMU);
}

+void paravirt_flush_lazy_mmu(void)
+{
+ preempt_disable();
+
+ if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {
+ arch_leave_lazy_mmu_mode();
+ arch_enter_lazy_mmu_mode();
+ }
+
+ preempt_enable();
+}
+
void paravirt_start_context_switch(struct task_struct *prev)
{
BUG_ON(preemptible());
@@ -282,18 +294,6 @@ enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
return percpu_read(paravirt_lazy_mode);
}

-void arch_flush_lazy_mmu_mode(void)
-{
- preempt_disable();
-
- if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) {
- arch_leave_lazy_mmu_mode();
- arch_enter_lazy_mmu_mode();
- }
-
- preempt_enable();
-}
-
struct pv_info pv_info = {
.name = "bare hardware",
.paravirt_enabled = 0,
@@ -462,6 +462,7 @@ struct pv_mmu_ops pv_mmu_ops = {
.lazy_mode = {
.enter = paravirt_nop,
.leave = paravirt_nop,
+ .flush = paravirt_nop,
},

.set_fixmap = native_set_fixmap,
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index db832fd..2d45247 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -1309,6 +1309,7 @@ __init void lguest_init(void)
pv_mmu_ops.read_cr3 = lguest_read_cr3;
pv_mmu_ops.lazy_mode.enter = paravirt_enter_lazy_mmu;
pv_mmu_ops.lazy_mode.leave = lguest_leave_lazy_mmu_mode;
+ pv_mmu_ops.lazy_mode.flush = paravirt_flush_lazy_mmu;
pv_mmu_ops.pte_update = lguest_pte_update;
pv_mmu_ops.pte_update_defer = lguest_pte_update;

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 3b2ad91..7653f14 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -376,10 +376,12 @@ static noinline __kprobes int vmalloc_fault(unsigned long address)
if (pgd_none(*pgd_ref))
return -1;

- if (pgd_none(*pgd))
+ if (pgd_none(*pgd)) {
set_pgd(pgd, *pgd_ref);
- else
+ arch_flush_lazy_mmu_mode();
+ } else {
BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
+ }

/*
* Below here mismatches are bugs because these lower tables
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 849a975..025d469 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -73,167 +73,6 @@ unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,

extern unsigned long highend_pfn, highstart_pfn;

-#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
-
-static void *node_remap_start_vaddr[MAX_NUMNODES];
-void set_pmd_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
-
-/*
- * Remap memory allocator
- */
-static unsigned long node_remap_start_pfn[MAX_NUMNODES];
-static void *node_remap_end_vaddr[MAX_NUMNODES];
-static void *node_remap_alloc_vaddr[MAX_NUMNODES];
-
-/**
- * alloc_remap - Allocate remapped memory
- * @nid: NUMA node to allocate memory from
- * @size: The size of allocation
- *
- * Allocate @size bytes from the remap area of NUMA node @nid. The
- * size of the remap area is predetermined by init_alloc_remap() and
- * only the callers considered there should call this function. For
- * more info, please read the comment on top of init_alloc_remap().
- *
- * The caller must be ready to handle allocation failure from this
- * function and fall back to regular memory allocator in such cases.
- *
- * CONTEXT:
- * Single CPU early boot context.
- *
- * RETURNS:
- * Pointer to the allocated memory on success, %NULL on failure.
- */
-void *alloc_remap(int nid, unsigned long size)
-{
- void *allocation = node_remap_alloc_vaddr[nid];
-
- size = ALIGN(size, L1_CACHE_BYTES);
-
- if (!allocation || (allocation + size) > node_remap_end_vaddr[nid])
- return NULL;
-
- node_remap_alloc_vaddr[nid] += size;
- memset(allocation, 0, size);
-
- return allocation;
-}
-
-#ifdef CONFIG_HIBERNATION
-/**
- * resume_map_numa_kva - add KVA mapping to the temporary page tables created
- * during resume from hibernation
- * @pgd_base - temporary resume page directory
- */
-void resume_map_numa_kva(pgd_t *pgd_base)
-{
- int node;
-
- for_each_online_node(node) {
- unsigned long start_va, start_pfn, nr_pages, pfn;
-
- start_va = (unsigned long)node_remap_start_vaddr[node];
- start_pfn = node_remap_start_pfn[node];
- nr_pages = (node_remap_end_vaddr[node] -
- node_remap_start_vaddr[node]) >> PAGE_SHIFT;
-
- printk(KERN_DEBUG "%s: node %d\n", __func__, node);
-
- for (pfn = 0; pfn < nr_pages; pfn += PTRS_PER_PTE) {
- unsigned long vaddr = start_va + (pfn << PAGE_SHIFT);
- pgd_t *pgd = pgd_base + pgd_index(vaddr);
- pud_t *pud = pud_offset(pgd, vaddr);
- pmd_t *pmd = pmd_offset(pud, vaddr);
-
- set_pmd(pmd, pfn_pmd(start_pfn + pfn,
- PAGE_KERNEL_LARGE_EXEC));
-
- printk(KERN_DEBUG "%s: %08lx -> pfn %08lx\n",
- __func__, vaddr, start_pfn + pfn);
- }
- }
-}
-#endif
-
-/**
- * init_alloc_remap - Initialize remap allocator for a NUMA node
- * @nid: NUMA node to initizlie remap allocator for
- *
- * NUMA nodes may end up without any lowmem. As allocating pgdat and
- * memmap on a different node with lowmem is inefficient, a special
- * remap allocator is implemented which can be used by alloc_remap().
- *
- * For each node, the amount of memory which will be necessary for
- * pgdat and memmap is calculated and two memory areas of the size are
- * allocated - one in the node and the other in lowmem; then, the area
- * in the node is remapped to the lowmem area.
- *
- * As pgdat and memmap must be allocated in lowmem anyway, this
- * doesn't waste lowmem address space; however, the actual lowmem
- * which gets remapped over is wasted. The amount shouldn't be
- * problematic on machines this feature will be used.
- *
- * Initialization failure isn't fatal. alloc_remap() is used
- * opportunistically and the callers will fall back to other memory
- * allocation mechanisms on failure.
- */
-void __init init_alloc_remap(int nid, u64 start, u64 end)
-{
- unsigned long start_pfn = start >> PAGE_SHIFT;
- unsigned long end_pfn = end >> PAGE_SHIFT;
- unsigned long size, pfn;
- u64 node_pa, remap_pa;
- void *remap_va;
-
- /*
- * The acpi/srat node info can show hot-add memroy zones where
- * memory could be added but not currently present.
- */
- printk(KERN_DEBUG "node %d pfn: [%lx - %lx]\n",
- nid, start_pfn, end_pfn);
-
- /* calculate the necessary space aligned to large page size */
- size = node_memmap_size_bytes(nid, start_pfn, end_pfn);
- size += ALIGN(sizeof(pg_data_t), PAGE_SIZE);
- size = ALIGN(size, LARGE_PAGE_BYTES);
-
- /* allocate node memory and the lowmem remap area */
- node_pa = memblock_find_in_range(start, end, size, LARGE_PAGE_BYTES);
- if (node_pa == MEMBLOCK_ERROR) {
- pr_warning("remap_alloc: failed to allocate %lu bytes for node %d\n",
- size, nid);
- return;
- }
- memblock_x86_reserve_range(node_pa, node_pa + size, "KVA RAM");
-
- remap_pa = memblock_find_in_range(min_low_pfn << PAGE_SHIFT,
- max_low_pfn << PAGE_SHIFT,
- size, LARGE_PAGE_BYTES);
- if (remap_pa == MEMBLOCK_ERROR) {
- pr_warning("remap_alloc: failed to allocate %lu bytes remap area for node %d\n",
- size, nid);
- memblock_x86_free_range(node_pa, node_pa + size);
- return;
- }
- memblock_x86_reserve_range(remap_pa, remap_pa + size, "KVA PG");
- remap_va = phys_to_virt(remap_pa);
-
- /* perform actual remap */
- for (pfn = 0; pfn < size >> PAGE_SHIFT; pfn += PTRS_PER_PTE)
- set_pmd_pfn((unsigned long)remap_va + (pfn << PAGE_SHIFT),
- (node_pa >> PAGE_SHIFT) + pfn,
- PAGE_KERNEL_LARGE);
-
- /* initialize remap allocator parameters */
- node_remap_start_pfn[nid] = node_pa >> PAGE_SHIFT;
- node_remap_start_vaddr[nid] = remap_va;
- node_remap_end_vaddr[nid] = remap_va + size;
- node_remap_alloc_vaddr[nid] = remap_va;
-
- printk(KERN_DEBUG "remap_alloc: node %d [%08llx-%08llx) -> [%p-%p)\n",
- nid, node_pa, node_pa + size, remap_va, remap_va + size);
-}
-
void __init initmem_init(void)
{
x86_numa_init();
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index d957dce..a0aed70 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -2011,6 +2011,7 @@ static const struct pv_mmu_ops xen_mmu_ops __initconst = {
.lazy_mode = {
.enter = paravirt_enter_lazy_mmu,
.leave = xen_leave_lazy_mmu,
+ .flush = paravirt_flush_lazy_mmu,
},

.set_fixmap = xen_set_fixmap,
diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 9f8658e..9892dcc 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -1064,6 +1064,33 @@ static unsigned long mtd_get_unmapped_area(struct file *file,
}
#endif

+static inline unsigned long get_vm_size(struct vm_area_struct *vma)
+{
+ return vma->vm_end - vma->vm_start;
+}
+
+static inline resource_size_t get_vm_offset(struct vm_area_struct *vma)
+{
+ return (resource_size_t) vma->vm_pgoff << PAGE_SHIFT;
+}
+
+/*
+ * Set a new vm offset.
+ *
+ * Verify that the incoming offset really works as a page offset,
+ * and that the offset and size fit in a resource_size_t.
+ */
+static inline int set_vm_offset(struct vm_area_struct *vma, resource_size_t off)
+{
+ pgoff_t pgoff = off >> PAGE_SHIFT;
+ if (off != (resource_size_t) pgoff << PAGE_SHIFT)
+ return -EINVAL;
+ if (off + get_vm_size(vma) - 1 < off)
+ return -EINVAL;
+ vma->vm_pgoff = pgoff;
+ return 0;
+}
+
/*
* set up a mapping for shared memory segments
*/
@@ -1073,20 +1100,33 @@ static int mtd_mmap(struct file *file, struct vm_area_struct *vma)
struct mtd_file_info *mfi = file->private_data;
struct mtd_info *mtd = mfi->mtd;
struct map_info *map = mtd->priv;
- unsigned long start;
- unsigned long off;
- u32 len;
-
- if (mtd->type == MTD_RAM || mtd->type == MTD_ROM) {
- off = vma->vm_pgoff << PAGE_SHIFT;
+ resource_size_t start, off;
+ unsigned long len, vma_len;
+
+ /* This is broken because it assumes the MTD device is map-based
+ and that mtd->priv is a valid struct map_info. It should be
+ replaced with something that uses the mtd_get_unmapped_area()
+ operation properly. */
+ if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) {
+ off = get_vm_offset(vma);
start = map->phys;
len = PAGE_ALIGN((start & ~PAGE_MASK) + map->size);
start &= PAGE_MASK;
- if ((vma->vm_end - vma->vm_start + off) > len)
+ vma_len = get_vm_size(vma);
+
+ /* Overflow in off+len? */
+ if (vma_len + off < off)
+ return -EINVAL;
+ /* Does it fit in the mapping? */
+ if (vma_len + off > len)
return -EINVAL;

off += start;
- vma->vm_pgoff = off >> PAGE_SHIFT;
+ /* Did that overflow? */
+ if (off < start)
+ return -EINVAL;
+ if (set_vm_offset(vma, off) < 0)
+ return -EINVAL;
vma->vm_flags |= VM_IO | VM_RESERVED;

#ifdef pgprot_noncached
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 80b230e..8350f8d 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -3105,11 +3105,34 @@ static void r810x_phy_power_up(struct rtl8169_private *tp)
rtl_writephy(tp, MII_BMCR, BMCR_ANENABLE);
}

+static void rtl_speed_down(struct rtl8169_private *tp)
+{
+ u32 adv;
+ int lpa;
+
+ rtl_writephy(tp, 0x1f, 0x0000);
+ lpa = rtl_readphy(tp, MII_LPA);
+
+ if (lpa & (LPA_10HALF | LPA_10FULL))
+ adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full;
+ else if (lpa & (LPA_100HALF | LPA_100FULL))
+ adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
+ ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
+ else
+ adv = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
+ ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full |
+ (tp->mii.supports_gmii ?
+ ADVERTISED_1000baseT_Half |
+ ADVERTISED_1000baseT_Full : 0);
+
+ rtl8169_set_speed(tp->dev, AUTONEG_ENABLE, SPEED_1000, DUPLEX_FULL,
+ adv);
+}
+
static void r810x_pll_power_down(struct rtl8169_private *tp)
{
if (__rtl8169_get_wol(tp) & WAKE_ANY) {
- rtl_writephy(tp, 0x1f, 0x0000);
- rtl_writephy(tp, MII_BMCR, 0x0000);
+ rtl_speed_down(tp);
return;
}

@@ -3201,8 +3224,7 @@ static void r8168_pll_power_down(struct rtl8169_private *tp)
rtl_ephy_write(ioaddr, 0x19, 0xff64);

if (__rtl8169_get_wol(tp) & WAKE_ANY) {
- rtl_writephy(tp, 0x1f, 0x0000);
- rtl_writephy(tp, MII_BMCR, 0x0000);
+ rtl_speed_down(tp);

if (tp->mac_version == RTL_GIGA_MAC_VER_32 ||
tp->mac_version == RTL_GIGA_MAC_VER_33)
diff --git a/drivers/target/target_core_alua.c b/drivers/target/target_core_alua.c
index c967405..527bda4 100644
--- a/drivers/target/target_core_alua.c
+++ b/drivers/target/target_core_alua.c
@@ -351,6 +351,7 @@ static inline int core_alua_state_standby(
case REPORT_LUNS:
case RECEIVE_DIAGNOSTIC:
case SEND_DIAGNOSTIC:
+ return 0;
case MAINTENANCE_IN:
switch (cdb[1]) {
case MI_REPORT_TARGET_PGS:
@@ -393,6 +394,7 @@ static inline int core_alua_state_unavailable(
switch (cdb[0]) {
case INQUIRY:
case REPORT_LUNS:
+ return 0;
case MAINTENANCE_IN:
switch (cdb[1]) {
case MI_REPORT_TARGET_PGS:
@@ -433,6 +435,7 @@ static inline int core_alua_state_transition(
switch (cdb[0]) {
case INQUIRY:
case REPORT_LUNS:
+ return 0;
case MAINTENANCE_IN:
switch (cdb[1]) {
case MI_REPORT_TARGET_PGS:
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index 9d8af0b..1eeaf74 100644
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -176,10 +176,36 @@ static u64 sched_clock_remote(struct sched_clock_data *scd)
u64 this_clock, remote_clock;
u64 *ptr, old_val, val;

+#if BITS_PER_LONG != 64
+again:
+ /*
+ * Careful here: The local and the remote clock values need to
+ * be read out atomic as we need to compare the values and
+ * then update either the local or the remote side. So the
+ * cmpxchg64 below only protects one readout.
+ *
+ * We must reread via sched_clock_local() in the retry case on
+ * 32bit as an NMI could use sched_clock_local() via the
+ * tracer and hit between the readout of
+ * the low32bit and the high 32bit portion.
+ */
+ this_clock = sched_clock_local(my_scd);
+ /*
+ * We must enforce atomic readout on 32bit, otherwise the
+ * update on the remote cpu can hit inbetween the readout of
+ * the low32bit and the high 32bit portion.
+ */
+ remote_clock = cmpxchg64(&scd->clock, 0, 0);
+#else
+ /*
+ * On 64bit the read of [my]scd->clock is atomic versus the
+ * update, so we can avoid the above 32bit dance.
+ */
sched_clock_local(my_scd);
again:
this_clock = my_scd->clock;
remote_clock = scd->clock;
+#endif

/*
* Use the opportunity that we have both locks
diff --git a/kernel/sys.c b/kernel/sys.c
index 84e353b1..1c69aa7 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -320,7 +320,6 @@ void kernel_restart_prepare(char *cmd)
system_state = SYSTEM_RESTART;
usermodehelper_disable();
device_shutdown();
- syscore_shutdown();
}

/**
@@ -335,6 +334,7 @@ void kernel_restart(char *cmd)
{
kernel_restart_prepare(cmd);
disable_nonboot_cpus();
+ syscore_shutdown();
if (!cmd)
printk(KERN_EMERG "Restarting system.\n");
else
@@ -360,6 +360,7 @@ static void kernel_shutdown_prepare(enum system_states state)
void kernel_halt(void)
{
kernel_shutdown_prepare(SYSTEM_HALT);
+ disable_nonboot_cpus();
syscore_shutdown();
printk(KERN_EMERG "System halted.\n");
kmsg_dump(KMSG_DUMP_HALT);
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 63ce76f..5312d96 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -566,7 +566,6 @@ int ftrace_profile_pages_init(struct ftrace_profile_stat *stat)
free_page(tmp);
}

- free_page((unsigned long)stat->pages);
stat->pages = NULL;
stat->start = NULL;

diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index 43e3d76..fea5b7a 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -1101,6 +1101,8 @@ static const struct snd_soc_dapm_route wm8903_intercon[] = {
{ "ROP", NULL, "Right Speaker PGA" },
{ "RON", NULL, "Right Speaker PGA" },

+ { "Charge Pump", NULL, "CLK_DSP" },
+
{ "Left Headphone Output PGA", NULL, "Charge Pump" },
{ "Right Headphone Output PGA", NULL, "Charge Pump" },
{ "Left Line Output PGA", NULL, "Charge Pump" },
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index b4c516a..2d224f4 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -396,7 +396,7 @@ static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
else
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
- 0, cpu_to_le16(wIndex),
+ 0, wIndex,
&tmp, sizeof(tmp), 1000);
up_read(&mixer->chip->shutdown_rwsem);

@@ -427,7 +427,7 @@ static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
else
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
- cpu_to_le16(wValue), cpu_to_le16(wIndex),
+ wValue, wIndex,
NULL, 0, 1000);
up_read(&mixer->chip->shutdown_rwsem);

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 090e193..eb22768 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -455,7 +455,7 @@ static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
{
int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
- cpu_to_le16(1), 0, NULL, 0, 1000);
+ 1, 0, NULL, 0, 1000);

if (ret < 0)
return ret;
--
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