Merge tag 's390-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

 - Add support for the hugetlb_cma command line option to allocate
   gigantic hugepages using CMA

 - Add arch_get_random_long() support.

 - Add ap bus userspace notifications.

 - Increase default size of vmalloc area to 512GB and otherwise let it
   increase dynamically by the size of physical memory. This should fix
   all occurrences where the vmalloc area was not large enough.

 - Completely get rid of set_fs() (aka select SET_FS) and rework address
   space handling while doing that; making address space handling much
   more simple.

 - Reimplement getcpu vdso syscall in C.

 - Add support for extended SCLP responses (> 4k). This allows e.g. to
   handle also potential large system configurations.

 - Simplify KASAN by removing 3-level page table support and only
   supporting 4-levels from now on.

 - Improve debug-ability of the kernel decompressor code, which now
   prints also stack traces and symbols in case of problems to the
   console.

 - Remove more power management leftovers.

 - Other various fixes and improvements all over the place.

* tag 's390-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (62 commits)
  s390/mm: add support to allocate gigantic hugepages using CMA
  s390/crypto: add arch_get_random_long() support
  s390/smp: perform initial CPU reset also for SMT siblings
  s390/mm: use invalid asce for user space when switching to init_mm
  s390/idle: fix accounting with machine checks
  s390/idle: add missing mt_cycles calculation
  s390/boot: add build-id to decompressor
  s390/kexec_file: fix diag308 subcode when loading crash kernel
  s390/cio: fix use-after-free in ccw_device_destroy_console
  s390/cio: remove pm support from ccw bus driver
  s390/cio: remove pm support from css-bus driver
  s390/cio: remove pm support from IO subchannel drivers
  s390/cio: remove pm support from chsc subchannel driver
  s390/vmur: remove unused pm related functions
  s390/tape: remove unsupported PM functions
  s390/cio: remove pm support from eadm-sch drivers
  s390: remove pm support from console drivers
  s390/dasd: remove unused pm related functions
  s390/zfcp: remove pm support from zfcp driver
  s390/ap: let bus_register() add the AP bus sysfs attributes
  ...

1 files changed, 4 insertions, 54 deletions

diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index f9da5b149141..aef2edff9959 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -29,6 +29,7 @@
 #include <asm/sections.h>
 #include <asm/vdso.h>
 #include <asm/facility.h>
+#include <asm/timex.h>
 
 extern char vdso64_start, vdso64_end;
 static void *vdso64_kbase = &vdso64_start;
@@ -99,60 +100,10 @@ static union {
 	u8			page[PAGE_SIZE];
 } vdso_data_store __page_aligned_data;
 struct vdso_data *vdso_data = (struct vdso_data *)&vdso_data_store.data;
-/*
- * Allocate/free per cpu vdso data.
- */
-#define SEGMENT_ORDER	2
 
-int vdso_alloc_per_cpu(struct lowcore *lowcore)
+void vdso_getcpu_init(void)
 {
-	unsigned long segment_table, page_table, page_frame;
-	struct vdso_per_cpu_data *vd;
-
-	segment_table = __get_free_pages(GFP_KERNEL, SEGMENT_ORDER);
-	page_table = get_zeroed_page(GFP_KERNEL);
-	page_frame = get_zeroed_page(GFP_KERNEL);
-	if (!segment_table || !page_table || !page_frame)
-		goto out;
-	arch_set_page_dat(virt_to_page(segment_table), SEGMENT_ORDER);
-	arch_set_page_dat(virt_to_page(page_table), 0);
-
-	/* Initialize per-cpu vdso data page */
-	vd = (struct vdso_per_cpu_data *) page_frame;
-	vd->cpu_nr = lowcore->cpu_nr;
-	vd->node_id = cpu_to_node(vd->cpu_nr);
-
-	/* Set up page table for the vdso address space */
-	memset64((u64 *)segment_table, _SEGMENT_ENTRY_EMPTY, _CRST_ENTRIES);
-	memset64((u64 *)page_table, _PAGE_INVALID, PTRS_PER_PTE);
-
-	*(unsigned long *) segment_table = _SEGMENT_ENTRY + page_table;
-	*(unsigned long *) page_table = _PAGE_PROTECT + page_frame;
-
-	lowcore->vdso_asce = segment_table +
-		_ASCE_TABLE_LENGTH + _ASCE_USER_BITS + _ASCE_TYPE_SEGMENT;
-	lowcore->vdso_per_cpu_data = page_frame;
-
-	return 0;
-
-out:
-	free_page(page_frame);
-	free_page(page_table);
-	free_pages(segment_table, SEGMENT_ORDER);
-	return -ENOMEM;
-}
-
-void vdso_free_per_cpu(struct lowcore *lowcore)
-{
-	unsigned long segment_table, page_table, page_frame;
-
-	segment_table = lowcore->vdso_asce & PAGE_MASK;
-	page_table = *(unsigned long *) segment_table;
-	page_frame = *(unsigned long *) page_table;
-
-	free_page(page_frame);
-	free_page(page_table);
-	free_pages(segment_table, SEGMENT_ORDER);
+	set_tod_programmable_field(smp_processor_id());
 }
 
 /*
@@ -225,6 +176,7 @@ static int __init vdso_init(void)
 {
 	int i;
 
+	vdso_getcpu_init();
 	/* Calculate the size of the 64 bit vDSO */
 	vdso64_pages = ((&vdso64_end - &vdso64_start
 			 + PAGE_SIZE - 1) >> PAGE_SHIFT) + 1;
@@ -240,8 +192,6 @@ static int __init vdso_init(void)
 	}
 	vdso64_pagelist[vdso64_pages - 1] = virt_to_page(vdso_data);
 	vdso64_pagelist[vdso64_pages] = NULL;
-	if (vdso_alloc_per_cpu(&S390_lowcore))
-		BUG();
 
 	get_page(virt_to_page(vdso_data));