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-rw-r--r--arch/alpha/include/asm/word-at-a-time.h2
-rw-r--r--arch/h8300/include/asm/Kbuild1
-rw-r--r--arch/powerpc/include/asm/Kbuild1
-rw-r--r--arch/s390/boot/compressed/Makefile2
-rw-r--r--arch/s390/configs/default_defconfig2
-rw-r--r--arch/s390/configs/gcov_defconfig2
-rw-r--r--arch/s390/configs/performance_defconfig2
-rw-r--r--arch/s390/include/asm/numa.h2
-rw-r--r--arch/s390/include/asm/topology.h2
-rw-r--r--arch/s390/kernel/asm-offsets.c1
-rw-r--r--arch/s390/kernel/entry.S30
-rw-r--r--arch/s390/kernel/vtime.c66
-rw-r--r--arch/s390/numa/mode_emu.c4
-rw-r--r--arch/s390/numa/numa.c4
-rw-r--r--arch/tile/include/asm/Kbuild1
-rw-r--r--arch/tile/include/asm/word-at-a-time.h8
-rw-r--r--arch/x86/include/asm/xen/hypercall.h4
-rw-r--r--arch/x86/xen/enlighten.c24
-rw-r--r--arch/x86/xen/p2m.c19
-rw-r--r--arch/x86/xen/setup.c4
20 files changed, 133 insertions, 48 deletions
diff --git a/arch/alpha/include/asm/word-at-a-time.h b/arch/alpha/include/asm/word-at-a-time.h
index 6b340d0f1521..902e6ab00a06 100644
--- a/arch/alpha/include/asm/word-at-a-time.h
+++ b/arch/alpha/include/asm/word-at-a-time.h
@@ -52,4 +52,6 @@ static inline unsigned long find_zero(unsigned long bits)
#endif
}
+#define zero_bytemask(mask) ((2ul << (find_zero(mask) * 8)) - 1)
+
#endif /* _ASM_WORD_AT_A_TIME_H */
diff --git a/arch/h8300/include/asm/Kbuild b/arch/h8300/include/asm/Kbuild
index 70e6ae1e7006..373cb23301e3 100644
--- a/arch/h8300/include/asm/Kbuild
+++ b/arch/h8300/include/asm/Kbuild
@@ -73,4 +73,5 @@ generic-y += uaccess.h
generic-y += ucontext.h
generic-y += unaligned.h
generic-y += vga.h
+generic-y += word-at-a-time.h
generic-y += xor.h
diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild
index ac1662956e0c..ab9f4e0ed4cf 100644
--- a/arch/powerpc/include/asm/Kbuild
+++ b/arch/powerpc/include/asm/Kbuild
@@ -7,4 +7,3 @@ generic-y += mcs_spinlock.h
generic-y += preempt.h
generic-y += rwsem.h
generic-y += vtime.h
-generic-y += word-at-a-time.h
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile
index d4788111c161..fac6ac9790fa 100644
--- a/arch/s390/boot/compressed/Makefile
+++ b/arch/s390/boot/compressed/Makefile
@@ -10,7 +10,7 @@ targets += misc.o piggy.o sizes.h head.o
KBUILD_CFLAGS := -m64 -D__KERNEL__ $(LINUX_INCLUDE) -O2
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
-KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks
+KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -msoft-float
KBUILD_CFLAGS += $(call cc-option,-mpacked-stack)
KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
diff --git a/arch/s390/configs/default_defconfig b/arch/s390/configs/default_defconfig
index 0c98f1508542..ed7da281df66 100644
--- a/arch/s390/configs/default_defconfig
+++ b/arch/s390/configs/default_defconfig
@@ -381,7 +381,7 @@ CONFIG_ISCSI_TCP=m
CONFIG_SCSI_DEBUG=m
CONFIG_ZFCP=y
CONFIG_SCSI_VIRTIO=m
-CONFIG_SCSI_DH=m
+CONFIG_SCSI_DH=y
CONFIG_SCSI_DH_RDAC=m
CONFIG_SCSI_DH_HP_SW=m
CONFIG_SCSI_DH_EMC=m
diff --git a/arch/s390/configs/gcov_defconfig b/arch/s390/configs/gcov_defconfig
index 82083e1fbdc4..9858b14cde1e 100644
--- a/arch/s390/configs/gcov_defconfig
+++ b/arch/s390/configs/gcov_defconfig
@@ -377,7 +377,7 @@ CONFIG_ISCSI_TCP=m
CONFIG_SCSI_DEBUG=m
CONFIG_ZFCP=y
CONFIG_SCSI_VIRTIO=m
-CONFIG_SCSI_DH=m
+CONFIG_SCSI_DH=y
CONFIG_SCSI_DH_RDAC=m
CONFIG_SCSI_DH_HP_SW=m
CONFIG_SCSI_DH_EMC=m
diff --git a/arch/s390/configs/performance_defconfig b/arch/s390/configs/performance_defconfig
index c05c9e0821e3..7f14f80717d4 100644
--- a/arch/s390/configs/performance_defconfig
+++ b/arch/s390/configs/performance_defconfig
@@ -377,7 +377,7 @@ CONFIG_ISCSI_TCP=m
CONFIG_SCSI_DEBUG=m
CONFIG_ZFCP=y
CONFIG_SCSI_VIRTIO=m
-CONFIG_SCSI_DH=m
+CONFIG_SCSI_DH=y
CONFIG_SCSI_DH_RDAC=m
CONFIG_SCSI_DH_HP_SW=m
CONFIG_SCSI_DH_EMC=m
diff --git a/arch/s390/include/asm/numa.h b/arch/s390/include/asm/numa.h
index 2a0efc63b9e5..dc19ee0c92aa 100644
--- a/arch/s390/include/asm/numa.h
+++ b/arch/s390/include/asm/numa.h
@@ -19,7 +19,7 @@ int numa_pfn_to_nid(unsigned long pfn);
int __node_distance(int a, int b);
void numa_update_cpu_topology(void);
-extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
+extern cpumask_t node_to_cpumask_map[MAX_NUMNODES];
extern int numa_debug_enabled;
#else
diff --git a/arch/s390/include/asm/topology.h b/arch/s390/include/asm/topology.h
index 27ebde643933..94fc55fc72ce 100644
--- a/arch/s390/include/asm/topology.h
+++ b/arch/s390/include/asm/topology.h
@@ -68,7 +68,7 @@ static inline int cpu_to_node(int cpu)
#define cpumask_of_node cpumask_of_node
static inline const struct cpumask *cpumask_of_node(int node)
{
- return node_to_cpumask_map[node];
+ return &node_to_cpumask_map[node];
}
/*
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 48c9af7a7683..3aeeb1b562c0 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -176,6 +176,7 @@ int main(void)
DEFINE(__LC_PASTE, offsetof(struct _lowcore, paste));
DEFINE(__LC_FP_CREG_SAVE_AREA, offsetof(struct _lowcore, fpt_creg_save_area));
DEFINE(__LC_LAST_BREAK, offsetof(struct _lowcore, breaking_event_addr));
+ DEFINE(__LC_PERCPU_OFFSET, offsetof(struct _lowcore, percpu_offset));
DEFINE(__LC_VDSO_PER_CPU, offsetof(struct _lowcore, vdso_per_cpu_data));
DEFINE(__LC_GMAP, offsetof(struct _lowcore, gmap));
DEFINE(__LC_PGM_TDB, offsetof(struct _lowcore, pgm_tdb));
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 09b039d7983d..582fe44ab07c 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -733,6 +733,14 @@ ENTRY(psw_idle)
stg %r3,__SF_EMPTY(%r15)
larl %r1,.Lpsw_idle_lpsw+4
stg %r1,__SF_EMPTY+8(%r15)
+#ifdef CONFIG_SMP
+ larl %r1,smp_cpu_mtid
+ llgf %r1,0(%r1)
+ ltgr %r1,%r1
+ jz .Lpsw_idle_stcctm
+ .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+16(%r15)
+.Lpsw_idle_stcctm:
+#endif
STCK __CLOCK_IDLE_ENTER(%r2)
stpt __TIMER_IDLE_ENTER(%r2)
.Lpsw_idle_lpsw:
@@ -1159,7 +1167,27 @@ cleanup_critical:
jhe 1f
mvc __CLOCK_IDLE_ENTER(8,%r2),__CLOCK_IDLE_EXIT(%r2)
mvc __TIMER_IDLE_ENTER(8,%r2),__TIMER_IDLE_EXIT(%r2)
-1: # account system time going idle
+1: # calculate idle cycles
+#ifdef CONFIG_SMP
+ clg %r9,BASED(.Lcleanup_idle_insn)
+ jl 3f
+ larl %r1,smp_cpu_mtid
+ llgf %r1,0(%r1)
+ ltgr %r1,%r1
+ jz 3f
+ .insn rsy,0xeb0000000017,%r1,5,__SF_EMPTY+80(%r15)
+ larl %r3,mt_cycles
+ ag %r3,__LC_PERCPU_OFFSET
+ la %r4,__SF_EMPTY+16(%r15)
+2: lg %r0,0(%r3)
+ slg %r0,0(%r4)
+ alg %r0,64(%r4)
+ stg %r0,0(%r3)
+ la %r3,8(%r3)
+ la %r4,8(%r4)
+ brct %r1,2b
+#endif
+3: # account system time going idle
lg %r9,__LC_STEAL_TIMER
alg %r9,__CLOCK_IDLE_ENTER(%r2)
slg %r9,__LC_LAST_UPDATE_CLOCK
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index c8653435c70d..dafc44f519c3 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -25,7 +25,7 @@ static DEFINE_SPINLOCK(virt_timer_lock);
static atomic64_t virt_timer_current;
static atomic64_t virt_timer_elapsed;
-static DEFINE_PER_CPU(u64, mt_cycles[32]);
+DEFINE_PER_CPU(u64, mt_cycles[8]);
static DEFINE_PER_CPU(u64, mt_scaling_mult) = { 1 };
static DEFINE_PER_CPU(u64, mt_scaling_div) = { 1 };
static DEFINE_PER_CPU(u64, mt_scaling_jiffies);
@@ -60,6 +60,34 @@ static inline int virt_timer_forward(u64 elapsed)
return elapsed >= atomic64_read(&virt_timer_current);
}
+static void update_mt_scaling(void)
+{
+ u64 cycles_new[8], *cycles_old;
+ u64 delta, fac, mult, div;
+ int i;
+
+ stcctm5(smp_cpu_mtid + 1, cycles_new);
+ cycles_old = this_cpu_ptr(mt_cycles);
+ fac = 1;
+ mult = div = 0;
+ for (i = 0; i <= smp_cpu_mtid; i++) {
+ delta = cycles_new[i] - cycles_old[i];
+ div += delta;
+ mult *= i + 1;
+ mult += delta * fac;
+ fac *= i + 1;
+ }
+ div *= fac;
+ if (div > 0) {
+ /* Update scaling factor */
+ __this_cpu_write(mt_scaling_mult, mult);
+ __this_cpu_write(mt_scaling_div, div);
+ memcpy(cycles_old, cycles_new,
+ sizeof(u64) * (smp_cpu_mtid + 1));
+ }
+ __this_cpu_write(mt_scaling_jiffies, jiffies_64);
+}
+
/*
* Update process times based on virtual cpu times stored by entry.S
* to the lowcore fields user_timer, system_timer & steal_clock.
@@ -69,7 +97,6 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
struct thread_info *ti = task_thread_info(tsk);
u64 timer, clock, user, system, steal;
u64 user_scaled, system_scaled;
- int i;
timer = S390_lowcore.last_update_timer;
clock = S390_lowcore.last_update_clock;
@@ -85,34 +112,10 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
S390_lowcore.system_timer += timer - S390_lowcore.last_update_timer;
S390_lowcore.steal_timer += S390_lowcore.last_update_clock - clock;
- /* Do MT utilization calculation */
+ /* Update MT utilization calculation */
if (smp_cpu_mtid &&
- time_after64(jiffies_64, __this_cpu_read(mt_scaling_jiffies))) {
- u64 cycles_new[32], *cycles_old;
- u64 delta, fac, mult, div;
-
- cycles_old = this_cpu_ptr(mt_cycles);
- if (stcctm5(smp_cpu_mtid + 1, cycles_new) < 2) {
- fac = 1;
- mult = div = 0;
- for (i = 0; i <= smp_cpu_mtid; i++) {
- delta = cycles_new[i] - cycles_old[i];
- div += delta;
- mult *= i + 1;
- mult += delta * fac;
- fac *= i + 1;
- }
- div *= fac;
- if (div > 0) {
- /* Update scaling factor */
- __this_cpu_write(mt_scaling_mult, mult);
- __this_cpu_write(mt_scaling_div, div);
- memcpy(cycles_old, cycles_new,
- sizeof(u64) * (smp_cpu_mtid + 1));
- }
- }
- __this_cpu_write(mt_scaling_jiffies, jiffies_64);
- }
+ time_after64(jiffies_64, this_cpu_read(mt_scaling_jiffies)))
+ update_mt_scaling();
user = S390_lowcore.user_timer - ti->user_timer;
S390_lowcore.steal_timer -= user;
@@ -181,6 +184,11 @@ void vtime_account_irq_enter(struct task_struct *tsk)
S390_lowcore.last_update_timer = get_vtimer();
S390_lowcore.system_timer += timer - S390_lowcore.last_update_timer;
+ /* Update MT utilization calculation */
+ if (smp_cpu_mtid &&
+ time_after64(jiffies_64, this_cpu_read(mt_scaling_jiffies)))
+ update_mt_scaling();
+
system = S390_lowcore.system_timer - ti->system_timer;
S390_lowcore.steal_timer -= system;
ti->system_timer = S390_lowcore.system_timer;
diff --git a/arch/s390/numa/mode_emu.c b/arch/s390/numa/mode_emu.c
index 7de4e2f780d7..30b2698a28e2 100644
--- a/arch/s390/numa/mode_emu.c
+++ b/arch/s390/numa/mode_emu.c
@@ -368,7 +368,7 @@ static void topology_add_core(struct toptree *core)
cpumask_copy(&top->thread_mask, &core->mask);
cpumask_copy(&top->core_mask, &core_mc(core)->mask);
cpumask_copy(&top->book_mask, &core_book(core)->mask);
- cpumask_set_cpu(cpu, node_to_cpumask_map[core_node(core)->id]);
+ cpumask_set_cpu(cpu, &node_to_cpumask_map[core_node(core)->id]);
top->node_id = core_node(core)->id;
}
}
@@ -383,7 +383,7 @@ static void toptree_to_topology(struct toptree *numa)
/* Clear all node masks */
for (i = 0; i < MAX_NUMNODES; i++)
- cpumask_clear(node_to_cpumask_map[i]);
+ cpumask_clear(&node_to_cpumask_map[i]);
/* Rebuild all masks */
toptree_for_each(core, numa, CORE)
diff --git a/arch/s390/numa/numa.c b/arch/s390/numa/numa.c
index 09b1d2355bd9..43f32ce60aa3 100644
--- a/arch/s390/numa/numa.c
+++ b/arch/s390/numa/numa.c
@@ -23,7 +23,7 @@
pg_data_t *node_data[MAX_NUMNODES];
EXPORT_SYMBOL(node_data);
-cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
+cpumask_t node_to_cpumask_map[MAX_NUMNODES];
EXPORT_SYMBOL(node_to_cpumask_map);
const struct numa_mode numa_mode_plain = {
@@ -144,7 +144,7 @@ void __init numa_setup(void)
static int __init numa_init_early(void)
{
/* Attach all possible CPUs to node 0 for now. */
- cpumask_copy(node_to_cpumask_map[0], cpu_possible_mask);
+ cpumask_copy(&node_to_cpumask_map[0], cpu_possible_mask);
return 0;
}
early_initcall(numa_init_early);
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild
index 0b6cacaad933..ba35c41c71ff 100644
--- a/arch/tile/include/asm/Kbuild
+++ b/arch/tile/include/asm/Kbuild
@@ -40,5 +40,4 @@ generic-y += termbits.h
generic-y += termios.h
generic-y += trace_clock.h
generic-y += types.h
-generic-y += word-at-a-time.h
generic-y += xor.h
diff --git a/arch/tile/include/asm/word-at-a-time.h b/arch/tile/include/asm/word-at-a-time.h
index 9e5ce0d7b292..b66a693c2c34 100644
--- a/arch/tile/include/asm/word-at-a-time.h
+++ b/arch/tile/include/asm/word-at-a-time.h
@@ -6,7 +6,7 @@
struct word_at_a_time { /* unused */ };
#define WORD_AT_A_TIME_CONSTANTS {}
-/* Generate 0x01 byte values for non-zero bytes using a SIMD instruction. */
+/* Generate 0x01 byte values for zero bytes using a SIMD instruction. */
static inline unsigned long has_zero(unsigned long val, unsigned long *data,
const struct word_at_a_time *c)
{
@@ -33,4 +33,10 @@ static inline long find_zero(unsigned long mask)
#endif
}
+#ifdef __BIG_ENDIAN
+#define zero_bytemask(mask) (~1ul << (63 - __builtin_clzl(mask)))
+#else
+#define zero_bytemask(mask) ((2ul << __builtin_ctzl(mask)) - 1)
+#endif
+
#endif /* _ASM_WORD_AT_A_TIME_H */
diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index 83aea8055119..4c20dd333412 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -336,10 +336,10 @@ HYPERVISOR_update_descriptor(u64 ma, u64 desc)
return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
}
-static inline int
+static inline long
HYPERVISOR_memory_op(unsigned int cmd, void *arg)
{
- return _hypercall2(int, memory_op, cmd, arg);
+ return _hypercall2(long, memory_op, cmd, arg);
}
static inline int
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 30d12afe52ed..993b7a71386d 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -33,6 +33,10 @@
#include <linux/memblock.h>
#include <linux/edd.h>
+#ifdef CONFIG_KEXEC_CORE
+#include <linux/kexec.h>
+#endif
+
#include <xen/xen.h>
#include <xen/events.h>
#include <xen/interface/xen.h>
@@ -1077,6 +1081,7 @@ static int xen_write_msr_safe(unsigned int msr, unsigned low, unsigned high)
/* Fast syscall setup is all done in hypercalls, so
these are all ignored. Stub them out here to stop
Xen console noise. */
+ break;
default:
if (!pmu_msr_write(msr, low, high, &ret))
@@ -1807,6 +1812,21 @@ static struct notifier_block xen_hvm_cpu_notifier = {
.notifier_call = xen_hvm_cpu_notify,
};
+#ifdef CONFIG_KEXEC_CORE
+static void xen_hvm_shutdown(void)
+{
+ native_machine_shutdown();
+ if (kexec_in_progress)
+ xen_reboot(SHUTDOWN_soft_reset);
+}
+
+static void xen_hvm_crash_shutdown(struct pt_regs *regs)
+{
+ native_machine_crash_shutdown(regs);
+ xen_reboot(SHUTDOWN_soft_reset);
+}
+#endif
+
static void __init xen_hvm_guest_init(void)
{
if (xen_pv_domain())
@@ -1826,6 +1846,10 @@ static void __init xen_hvm_guest_init(void)
x86_init.irqs.intr_init = xen_init_IRQ;
xen_hvm_init_time_ops();
xen_hvm_init_mmu_ops();
+#ifdef CONFIG_KEXEC_CORE
+ machine_ops.shutdown = xen_hvm_shutdown;
+ machine_ops.crash_shutdown = xen_hvm_crash_shutdown;
+#endif
}
#endif
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index bfc08b13044b..660b3cfef234 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -112,6 +112,15 @@ static unsigned long *p2m_identity;
static pte_t *p2m_missing_pte;
static pte_t *p2m_identity_pte;
+/*
+ * Hint at last populated PFN.
+ *
+ * Used to set HYPERVISOR_shared_info->arch.max_pfn so the toolstack
+ * can avoid scanning the whole P2M (which may be sized to account for
+ * hotplugged memory).
+ */
+static unsigned long xen_p2m_last_pfn;
+
static inline unsigned p2m_top_index(unsigned long pfn)
{
BUG_ON(pfn >= MAX_P2M_PFN);
@@ -270,7 +279,7 @@ void xen_setup_mfn_list_list(void)
else
HYPERVISOR_shared_info->arch.pfn_to_mfn_frame_list_list =
virt_to_mfn(p2m_top_mfn);
- HYPERVISOR_shared_info->arch.max_pfn = xen_max_p2m_pfn;
+ HYPERVISOR_shared_info->arch.max_pfn = xen_p2m_last_pfn;
HYPERVISOR_shared_info->arch.p2m_generation = 0;
HYPERVISOR_shared_info->arch.p2m_vaddr = (unsigned long)xen_p2m_addr;
HYPERVISOR_shared_info->arch.p2m_cr3 =
@@ -406,6 +415,8 @@ void __init xen_vmalloc_p2m_tree(void)
static struct vm_struct vm;
unsigned long p2m_limit;
+ xen_p2m_last_pfn = xen_max_p2m_pfn;
+
p2m_limit = (phys_addr_t)P2M_LIMIT * 1024 * 1024 * 1024 / PAGE_SIZE;
vm.flags = VM_ALLOC;
vm.size = ALIGN(sizeof(unsigned long) * max(xen_max_p2m_pfn, p2m_limit),
@@ -608,6 +619,12 @@ static bool alloc_p2m(unsigned long pfn)
free_p2m_page(p2m);
}
+ /* Expanded the p2m? */
+ if (pfn > xen_p2m_last_pfn) {
+ xen_p2m_last_pfn = pfn;
+ HYPERVISOR_shared_info->arch.max_pfn = xen_p2m_last_pfn;
+ }
+
return true;
}
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index f5ef6746d47a..1c30e4ab1022 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -548,7 +548,7 @@ static unsigned long __init xen_get_max_pages(void)
{
unsigned long max_pages, limit;
domid_t domid = DOMID_SELF;
- int ret;
+ long ret;
limit = xen_get_pages_limit();
max_pages = limit;
@@ -798,7 +798,7 @@ char * __init xen_memory_setup(void)
xen_ignore_unusable();
/* Make sure the Xen-supplied memory map is well-ordered. */
- sanitize_e820_map(xen_e820_map, xen_e820_map_entries,
+ sanitize_e820_map(xen_e820_map, ARRAY_SIZE(xen_e820_map),
&xen_e820_map_entries);
max_pages = xen_get_max_pages();
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.