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-rw-r--r--arch/s390/boot/compressed/Makefile2
-rw-r--r--arch/s390/include/asm/elf.h1
-rw-r--r--arch/s390/include/asm/pgtable.h20
-rw-r--r--arch/s390/include/uapi/asm/auxvec.h2
-rw-r--r--arch/s390/kernel/Makefile11
-rw-r--r--arch/s390/kernel/als.c124
-rw-r--r--arch/s390/kernel/entry.h2
-rw-r--r--arch/s390/kernel/head.S43
-rw-r--r--arch/s390/kernel/kprobes.c12
-rw-r--r--arch/s390/kernel/sclp.c5
-rw-r--r--arch/s390/mm/hugetlbpage.c52
-rw-r--r--arch/s390/numa/mode_emu.c4
-rw-r--r--arch/s390/numa/numa.c8
-rw-r--r--arch/s390/tools/gen_facilities.c1
14 files changed, 216 insertions, 71 deletions
diff --git a/arch/s390/boot/compressed/Makefile b/arch/s390/boot/compressed/Makefile
index 98ec652cc332..13723c39e58e 100644
--- a/arch/s390/boot/compressed/Makefile
+++ b/arch/s390/boot/compressed/Makefile
@@ -18,7 +18,7 @@ KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
GCOV_PROFILE := n
-OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o sclp.o ebcdic.o)
+OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o sclp.o ebcdic.o als.o)
OBJECTS += $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o
LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index 563ab9f44874..1736c7d3c94c 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -225,6 +225,7 @@ do { \
#define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
#define STACK_RND_MASK MMAP_RND_MASK
+/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
if (vdso_enabled) \
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index ea1533e07271..48d383af078f 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -242,8 +242,8 @@ static inline int is_module_addr(void *addr)
* swap .11..ttttt.0
* prot-none, clean, old .11.xx0000.1
* prot-none, clean, young .11.xx0001.1
- * prot-none, dirty, old .10.xx0010.1
- * prot-none, dirty, young .10.xx0011.1
+ * prot-none, dirty, old .11.xx0010.1
+ * prot-none, dirty, young .11.xx0011.1
* read-only, clean, old .11.xx0100.1
* read-only, clean, young .01.xx0101.1
* read-only, dirty, old .11.xx0110.1
@@ -323,8 +323,8 @@ static inline int is_module_addr(void *addr)
#define _SEGMENT_ENTRY_DIRTY 0x2000 /* SW segment dirty bit */
#define _SEGMENT_ENTRY_YOUNG 0x1000 /* SW segment young bit */
#define _SEGMENT_ENTRY_LARGE 0x0400 /* STE-format control, large page */
-#define _SEGMENT_ENTRY_READ 0x0002 /* SW segment read bit */
-#define _SEGMENT_ENTRY_WRITE 0x0001 /* SW segment write bit */
+#define _SEGMENT_ENTRY_WRITE 0x0002 /* SW segment write bit */
+#define _SEGMENT_ENTRY_READ 0x0001 /* SW segment read bit */
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _SEGMENT_ENTRY_SOFT_DIRTY 0x4000 /* SW segment soft dirty bit */
@@ -335,15 +335,15 @@ static inline int is_module_addr(void *addr)
/*
* Segment table and region3 table entry encoding
* (R = read-only, I = invalid, y = young bit):
- * dy..R...I...rw
+ * dy..R...I...wr
* prot-none, clean, old 00..1...1...00
* prot-none, clean, young 01..1...1...00
* prot-none, dirty, old 10..1...1...00
* prot-none, dirty, young 11..1...1...00
- * read-only, clean, old 00..1...1...10
- * read-only, clean, young 01..1...0...10
- * read-only, dirty, old 10..1...1...10
- * read-only, dirty, young 11..1...0...10
+ * read-only, clean, old 00..1...1...01
+ * read-only, clean, young 01..1...0...01
+ * read-only, dirty, old 10..1...1...01
+ * read-only, dirty, young 11..1...0...01
* read-write, clean, old 00..1...1...11
* read-write, clean, young 01..1...0...11
* read-write, dirty, old 10..0...1...11
@@ -382,7 +382,7 @@ static inline int is_module_addr(void *addr)
/*
* Page protection definitions.
*/
-#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID)
+#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID | _PAGE_PROTECT)
#define PAGE_READ __pgprot(_PAGE_PRESENT | _PAGE_READ | \
_PAGE_INVALID | _PAGE_PROTECT)
#define PAGE_WRITE __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
diff --git a/arch/s390/include/uapi/asm/auxvec.h b/arch/s390/include/uapi/asm/auxvec.h
index a1f153e89133..c53e08442255 100644
--- a/arch/s390/include/uapi/asm/auxvec.h
+++ b/arch/s390/include/uapi/asm/auxvec.h
@@ -3,4 +3,6 @@
#define AT_SYSINFO_EHDR 33
+#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
+
#endif
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index f37be37edd3a..3234817c7d47 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -4,6 +4,7 @@
KCOV_INSTRUMENT_early.o := n
KCOV_INSTRUMENT_sclp.o := n
+KCOV_INSTRUMENT_als.o := n
ifdef CONFIG_FUNCTION_TRACER
# Don't trace early setup code and tracing code
@@ -32,21 +33,25 @@ CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
CFLAGS_sysinfo.o += -w
#
-# Use -march=z900 for sclp.c to be able to print an error message if
-# the kernel is started on a machine which is too old
+# Use -march=z900 for sclp.c and als.c to be able to print an error
+# message if the kernel is started on a machine which is too old
#
CFLAGS_REMOVE_sclp.o = $(CC_FLAGS_FTRACE)
+CFLAGS_REMOVE_als.o = $(CC_FLAGS_FTRACE)
ifneq ($(CC_FLAGS_MARCH),-march=z900)
CFLAGS_REMOVE_sclp.o += $(CC_FLAGS_MARCH)
CFLAGS_sclp.o += -march=z900
+CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
+CFLAGS_als.o += -march=z900
AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
AFLAGS_head.o += -march=z900
endif
GCOV_PROFILE_sclp.o := n
+GCOV_PROFILE_als.o := n
obj-y := traps.o time.o process.o base.o early.o setup.o idle.o vtime.o
obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
-obj-y += debug.o irq.o ipl.o dis.o diag.o sclp.o vdso.o
+obj-y += debug.o irq.o ipl.o dis.o diag.o sclp.o vdso.o als.o
obj-y += sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
obj-y += runtime_instr.o cache.o fpu.o dumpstack.o
obj-y += entry.o reipl.o relocate_kernel.o
diff --git a/arch/s390/kernel/als.c b/arch/s390/kernel/als.c
new file mode 100644
index 000000000000..a16e9d1bf9e3
--- /dev/null
+++ b/arch/s390/kernel/als.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright IBM Corp. 2016
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/processor.h>
+#include <asm/facility.h>
+#include <asm/lowcore.h>
+#include <asm/sclp.h>
+#include "entry.h"
+
+/*
+ * The code within this file will be called very early. It may _not_
+ * access anything within the bss section, since that is not cleared
+ * yet and may contain data (e.g. initrd) that must be saved by other
+ * code.
+ * For temporary objects the stack (16k) should be used.
+ */
+
+static unsigned long als[] __initdata = { FACILITIES_ALS };
+
+static void __init u16_to_hex(char *str, u16 val)
+{
+ int i, num;
+
+ for (i = 1; i <= 4; i++) {
+ num = (val >> (16 - 4 * i)) & 0xf;
+ if (num >= 10)
+ num += 7;
+ *str++ = '0' + num;
+ }
+ *str = '\0';
+}
+
+static void __init print_machine_type(void)
+{
+ static char mach_str[80] __initdata = "Detected machine-type number: ";
+ char type_str[5];
+ struct cpuid id;
+
+ get_cpu_id(&id);
+ u16_to_hex(type_str, id.machine);
+ strcat(mach_str, type_str);
+ _sclp_print_early(mach_str);
+}
+
+static void __init u16_to_decimal(char *str, u16 val)
+{
+ int div = 1;
+
+ while (div * 10 <= val)
+ div *= 10;
+ while (div) {
+ *str++ = '0' + val / div;
+ val %= div;
+ div /= 10;
+ }
+ *str = '\0';
+}
+
+static void __init print_missing_facilities(void)
+{
+ static char als_str[80] __initdata = "Missing facilities: ";
+ unsigned long val;
+ char val_str[6];
+ int i, j, first;
+
+ first = 1;
+ for (i = 0; i < ARRAY_SIZE(als); i++) {
+ val = ~S390_lowcore.stfle_fac_list[i] & als[i];
+ for (j = 0; j < BITS_PER_LONG; j++) {
+ if (!(val & (1UL << (BITS_PER_LONG - 1 - j))))
+ continue;
+ if (!first)
+ strcat(als_str, ",");
+ /*
+ * Make sure we stay within one line. Consider that
+ * each facility bit adds up to five characters and
+ * z/VM adds a four character prefix.
+ */
+ if (strlen(als_str) > 70) {
+ _sclp_print_early(als_str);
+ *als_str = '\0';
+ }
+ u16_to_decimal(val_str, i * BITS_PER_LONG + j);
+ strcat(als_str, val_str);
+ first = 0;
+ }
+ }
+ _sclp_print_early(als_str);
+ _sclp_print_early("See Principles of Operations for facility bits");
+}
+
+static void __init facility_mismatch(void)
+{
+ _sclp_print_early("The Linux kernel requires more recent processor hardware");
+ print_machine_type();
+ print_missing_facilities();
+ disabled_wait(0x8badcccc);
+}
+
+void __init verify_facilities(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(S390_lowcore.stfle_fac_list); i++)
+ S390_lowcore.stfle_fac_list[i] = 0;
+ asm volatile(
+ " stfl 0(0)\n"
+ : "=m" (S390_lowcore.stfl_fac_list));
+ S390_lowcore.stfle_fac_list[0] = (u64)S390_lowcore.stfl_fac_list << 32;
+ if (S390_lowcore.stfl_fac_list & 0x01000000) {
+ register unsigned long reg0 asm("0") = ARRAY_SIZE(als) - 1;
+
+ asm volatile(".insn s,0xb2b00000,0(%1)" /* stfle */
+ : "+d" (reg0)
+ : "a" (&S390_lowcore.stfle_fac_list)
+ : "memory", "cc");
+ }
+ for (i = 0; i < ARRAY_SIZE(als); i++) {
+ if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i])
+ facility_mismatch();
+ }
+}
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index bedd2f55d860..e79f030dd276 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -79,4 +79,6 @@ long sys_s390_pci_mmio_read(unsigned long, void __user *, size_t);
DECLARE_PER_CPU(u64, mt_cycles[8]);
+void verify_facilities(void);
+
#endif /* _ENTRY_H */
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index fcaefb041364..56e4d8234ef2 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -306,49 +306,14 @@ ENTRY(startup_kdump)
stck __LC_LAST_UPDATE_CLOCK
spt 6f-.LPG0(%r13)
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
- stfl 0(%r0) # store facilities @ __LC_STFL_FAC_LIST
- mvc __LC_STFLE_FAC_LIST(4),__LC_STFL_FAC_LIST
- tm __LC_STFLE_FAC_LIST,0x01 # stfle available ?
- jz 0f
- lghi %r0,FACILITIES_ALS_DWORDS-1
- .insn s,0xb2b00000,__LC_STFLE_FAC_LIST # store facility list extended
- # verify if all required facilities are supported by the machine
-0: la %r1,__LC_STFLE_FAC_LIST
- la %r2,3f+8-.LPG0(%r13)
- lhi %r3,FACILITIES_ALS_DWORDS
-1: lg %r0,0(%r1)
- ng %r0,0(%r2)
- clg %r0,0(%r2)
- jne 2f
- la %r1,8(%r1)
- la %r2,8(%r2)
- ahi %r3,-1
- jnz 1b
- j 4f
-2: l %r15,.Lstack-.LPG0(%r13)
+ l %r15,.Lstack-.LPG0(%r13)
ahi %r15,-STACK_FRAME_OVERHEAD
- la %r2,.Lals_string-.LPG0(%r13)
- l %r3,.Lsclp_print-.LPG0(%r13)
- basr %r14,%r3
- lpsw 3f-.LPG0(%r13) # machine type not good enough, crash
-.Lals_string:
- .asciz "The Linux kernel requires more recent processor hardware"
-.Lsclp_print:
- .long _sclp_print_early
-.Lstack:
- .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
- .align 16
-3: .long 0x000a0000,0x8badcccc
-
-# List of facilities that are required. If not all facilities are present
-# the kernel will crash.
-
- .quad FACILITIES_ALS
-
-4:
+ brasl %r14,verify_facilities
/* Continue with startup code in head64.S */
jg startup_continue
+.Lstack:
+ .long 0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
.align 8
6: .long 0x7fffffff,0xffffffff
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 250f5972536a..dd6306c51bd6 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -690,6 +690,15 @@ int setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
stack = (unsigned long) regs->gprs[15];
memcpy(kcb->jprobes_stack, (void *) stack, MIN_STACK_SIZE(stack));
+
+ /*
+ * jprobes use jprobe_return() which skips the normal return
+ * path of the function, and this messes up the accounting of the
+ * function graph tracer to get messed up.
+ *
+ * Pause function graph tracing while performing the jprobe function.
+ */
+ pause_graph_tracing();
return 1;
}
NOKPROBE_SYMBOL(setjmp_pre_handler);
@@ -705,6 +714,9 @@ int longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
unsigned long stack;
+ /* It's OK to start function graph tracing again */
+ unpause_graph_tracing();
+
stack = (unsigned long) kcb->jprobe_saved_regs.gprs[15];
/* Put the regs back */
diff --git a/arch/s390/kernel/sclp.c b/arch/s390/kernel/sclp.c
index d88db40bdf15..f08af675f36f 100644
--- a/arch/s390/kernel/sclp.c
+++ b/arch/s390/kernel/sclp.c
@@ -12,8 +12,9 @@
#define EVTYP_VT220MSG_MASK 0x00000040
#define EVTYP_MSG_MASK 0x40000000
-static char _sclp_work_area[4096] __aligned(PAGE_SIZE);
-static bool have_vt220, have_linemode;
+static char _sclp_work_area[4096] __aligned(PAGE_SIZE) __section(data);
+static bool have_vt220 __section(data);
+static bool have_linemode __section(data);
static void _sclp_wait_int(void)
{
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c
index e19d853883be..cd404aa3931c 100644
--- a/arch/s390/mm/hugetlbpage.c
+++ b/arch/s390/mm/hugetlbpage.c
@@ -11,6 +11,12 @@
#include <linux/mm.h>
#include <linux/hugetlb.h>
+/*
+ * If the bit selected by single-bit bitmask "a" is set within "x", move
+ * it to the position indicated by single-bit bitmask "b".
+ */
+#define move_set_bit(x, a, b) (((x) & (a)) >> ilog2(a) << ilog2(b))
+
static inline unsigned long __pte_to_rste(pte_t pte)
{
unsigned long rste;
@@ -37,13 +43,22 @@ static inline unsigned long __pte_to_rste(pte_t pte)
*/
if (pte_present(pte)) {
rste = pte_val(pte) & PAGE_MASK;
- rste |= (pte_val(pte) & _PAGE_READ) >> 4;
- rste |= (pte_val(pte) & _PAGE_WRITE) >> 4;
- rste |= (pte_val(pte) & _PAGE_INVALID) >> 5;
- rste |= (pte_val(pte) & _PAGE_PROTECT);
- rste |= (pte_val(pte) & _PAGE_DIRTY) << 10;
- rste |= (pte_val(pte) & _PAGE_YOUNG) << 10;
- rste |= (pte_val(pte) & _PAGE_SOFT_DIRTY) << 13;
+ rste |= move_set_bit(pte_val(pte), _PAGE_READ,
+ _SEGMENT_ENTRY_READ);
+ rste |= move_set_bit(pte_val(pte), _PAGE_WRITE,
+ _SEGMENT_ENTRY_WRITE);
+ rste |= move_set_bit(pte_val(pte), _PAGE_INVALID,
+ _SEGMENT_ENTRY_INVALID);
+ rste |= move_set_bit(pte_val(pte), _PAGE_PROTECT,
+ _SEGMENT_ENTRY_PROTECT);
+ rste |= move_set_bit(pte_val(pte), _PAGE_DIRTY,
+ _SEGMENT_ENTRY_DIRTY);
+ rste |= move_set_bit(pte_val(pte), _PAGE_YOUNG,
+ _SEGMENT_ENTRY_YOUNG);
+#ifdef CONFIG_MEM_SOFT_DIRTY
+ rste |= move_set_bit(pte_val(pte), _PAGE_SOFT_DIRTY,
+ _SEGMENT_ENTRY_SOFT_DIRTY);
+#endif
} else
rste = _SEGMENT_ENTRY_INVALID;
return rste;
@@ -82,13 +97,22 @@ static inline pte_t __rste_to_pte(unsigned long rste)
if (present) {
pte_val(pte) = rste & _SEGMENT_ENTRY_ORIGIN_LARGE;
pte_val(pte) |= _PAGE_LARGE | _PAGE_PRESENT;
- pte_val(pte) |= (rste & _SEGMENT_ENTRY_READ) << 4;
- pte_val(pte) |= (rste & _SEGMENT_ENTRY_WRITE) << 4;
- pte_val(pte) |= (rste & _SEGMENT_ENTRY_INVALID) << 5;
- pte_val(pte) |= (rste & _SEGMENT_ENTRY_PROTECT);
- pte_val(pte) |= (rste & _SEGMENT_ENTRY_DIRTY) >> 10;
- pte_val(pte) |= (rste & _SEGMENT_ENTRY_YOUNG) >> 10;
- pte_val(pte) |= (rste & _SEGMENT_ENTRY_SOFT_DIRTY) >> 13;
+ pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_READ,
+ _PAGE_READ);
+ pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_WRITE,
+ _PAGE_WRITE);
+ pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_INVALID,
+ _PAGE_INVALID);
+ pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_PROTECT,
+ _PAGE_PROTECT);
+ pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_DIRTY,
+ _PAGE_DIRTY);
+ pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_YOUNG,
+ _PAGE_YOUNG);
+#ifdef CONFIG_MEM_SOFT_DIRTY
+ pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_SOFT_DIRTY,
+ _PAGE_DIRTY);
+#endif
} else
pte_val(pte) = _PAGE_INVALID;
return pte;
diff --git a/arch/s390/numa/mode_emu.c b/arch/s390/numa/mode_emu.c
index fbc394e16b2c..37e0bb835516 100644
--- a/arch/s390/numa/mode_emu.c
+++ b/arch/s390/numa/mode_emu.c
@@ -482,8 +482,12 @@ static int emu_setup_nodes_adjust(int nodes)
*/
static void emu_setup(void)
{
+ int nid;
+
emu_size = emu_setup_size_adjust(emu_size);
emu_nodes = emu_setup_nodes_adjust(emu_nodes);
+ for (nid = 0; nid < emu_nodes; nid++)
+ node_set(nid, node_possible_map);
pr_info("Creating %d nodes with memory stripe size %ld MB\n",
emu_nodes, emu_size >> 20);
}
diff --git a/arch/s390/numa/numa.c b/arch/s390/numa/numa.c
index 2794845061c6..f576f1073378 100644
--- a/arch/s390/numa/numa.c
+++ b/arch/s390/numa/numa.c
@@ -26,8 +26,14 @@ EXPORT_SYMBOL(node_data);
cpumask_t node_to_cpumask_map[MAX_NUMNODES];
EXPORT_SYMBOL(node_to_cpumask_map);
+static void plain_setup(void)
+{
+ node_set(0, node_possible_map);
+}
+
const struct numa_mode numa_mode_plain = {
.name = "plain",
+ .setup = plain_setup,
};
static const struct numa_mode *mode = &numa_mode_plain;
@@ -126,13 +132,13 @@ static void __init numa_setup_memory(void)
void __init numa_setup(void)
{
pr_info("NUMA mode: %s\n", mode->name);
+ nodes_clear(node_possible_map);
if (mode->setup)
mode->setup();
numa_setup_memory();
memblock_dump_all();
}
-
/*
* numa_init_early() - Initialization initcall
*
diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c
index e2660d27889b..fe4e6c910dd7 100644
--- a/arch/s390/tools/gen_facilities.c
+++ b/arch/s390/tools/gen_facilities.c
@@ -39,7 +39,6 @@ static void print_facility_list(struct facility_def *def)
printf("#define %s ", def->name);
for (i = 0; i <= high; i++)
printf("_AC(0x%016llx,UL)%c", array[i], i < high ? ',' : '\n');
- printf("#define %s_DWORDS %d\n", def->name, high + 1);
free(array);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 23:41:40 +0000