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authorLinus Torvalds <torvalds@linux-foundation.org>2018-12-14 15:35:30 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-14 15:35:30 -0800
commit6531e115b7ab84f563fcd7f0d2d05ccf971aaaf9 (patch)
tree04aa4f87b471e870a44ef94ee935d3a87bb12c4e
parent380ef2c9ad4fdd5fdd81055857be21ae5f581877 (diff)
parent3a6ab5c7dc114057fd67750e308e1745dafc0e6a (diff)
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton: "11 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: scripts/spdxcheck.py: always open files in binary mode checkstack.pl: fix for aarch64 userfaultfd: check VM_MAYWRITE was set after verifying the uffd is registered fs/iomap.c: get/put the page in iomap_page_create/release() hugetlbfs: call VM_BUG_ON_PAGE earlier in free_huge_page() memblock: annotate memblock_is_reserved() with __init_memblock psi: fix reference to kernel commandline enable arch/sh/include/asm/io.h: provide prototypes for PCI I/O mapping in asm/io.h mm/sparse: add common helper to mark all memblocks present mm: introduce common STRUCT_PAGE_MAX_SHIFT define alpha: fix hang caused by the bootmem removal
-rw-r--r--arch/alpha/kernel/setup.c1
-rw-r--r--arch/alpha/mm/numa.c6
-rw-r--r--arch/arm64/include/asm/memory.h9
-rw-r--r--arch/arm64/mm/init.c8
-rw-r--r--arch/sh/include/asm/io.h1
-rw-r--r--fs/iomap.c7
-rw-r--r--fs/userfaultfd.c3
-rw-r--r--include/asm-generic/fixmap.h1
-rw-r--r--include/linux/mm_types.h5
-rw-r--r--include/linux/mmzone.h6
-rw-r--r--init/Kconfig4
-rw-r--r--mm/hugetlb.c5
-rw-r--r--mm/memblock.c2
-rw-r--r--mm/sparse.c16
-rwxr-xr-xscripts/checkstack.pl4
-rwxr-xr-xscripts/spdxcheck.py6
16 files changed, 54 insertions, 30 deletions
diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
index a37fd990bd55..4b5b1b244f86 100644
--- a/arch/alpha/kernel/setup.c
+++ b/arch/alpha/kernel/setup.c
@@ -634,6 +634,7 @@ setup_arch(char **cmdline_p)
/* Find our memory. */
setup_memory(kernel_end);
+ memblock_set_bottom_up(true);
/* First guess at cpu cache sizes. Do this before init_arch. */
determine_cpu_caches(cpu->type);
diff --git a/arch/alpha/mm/numa.c b/arch/alpha/mm/numa.c
index 74846553e3f1..d0b73371e985 100644
--- a/arch/alpha/mm/numa.c
+++ b/arch/alpha/mm/numa.c
@@ -144,14 +144,14 @@ setup_memory_node(int nid, void *kernel_end)
if (!nid && (node_max_pfn < end_kernel_pfn || node_min_pfn > start_kernel_pfn))
panic("kernel loaded out of ram");
+ memblock_add(PFN_PHYS(node_min_pfn),
+ (node_max_pfn - node_min_pfn) << PAGE_SHIFT);
+
/* Zone start phys-addr must be 2^(MAX_ORDER-1) aligned.
Note that we round this down, not up - node memory
has much larger alignment than 8Mb, so it's safe. */
node_min_pfn &= ~((1UL << (MAX_ORDER-1))-1);
- memblock_add(PFN_PHYS(node_min_pfn),
- (node_max_pfn - node_min_pfn) << PAGE_SHIFT);
-
NODE_DATA(nid)->node_start_pfn = node_min_pfn;
NODE_DATA(nid)->node_present_pages = node_max_pfn - node_min_pfn;
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index b96442960aea..f0a5c9531e8b 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -35,15 +35,6 @@
#define PCI_IO_SIZE SZ_16M
/*
- * Log2 of the upper bound of the size of a struct page. Used for sizing
- * the vmemmap region only, does not affect actual memory footprint.
- * We don't use sizeof(struct page) directly since taking its size here
- * requires its definition to be available at this point in the inclusion
- * chain, and it may not be a power of 2 in the first place.
- */
-#define STRUCT_PAGE_MAX_SHIFT 6
-
-/*
* VMEMMAP_SIZE - allows the whole linear region to be covered by
* a struct page array
*/
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 9b432d9fcada..0340e45655c6 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -610,14 +610,6 @@ void __init mem_init(void)
BUILD_BUG_ON(TASK_SIZE_32 > TASK_SIZE_64);
#endif
-#ifdef CONFIG_SPARSEMEM_VMEMMAP
- /*
- * Make sure we chose the upper bound of sizeof(struct page)
- * correctly when sizing the VMEMMAP array.
- */
- BUILD_BUG_ON(sizeof(struct page) > (1 << STRUCT_PAGE_MAX_SHIFT));
-#endif
-
if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
extern int sysctl_overcommit_memory;
/*
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 98cb8c802b1a..4f7f235f15f8 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -24,6 +24,7 @@
#define __IO_PREFIX generic
#include <asm/io_generic.h>
#include <asm/io_trapped.h>
+#include <asm-generic/pci_iomap.h>
#include <mach/mangle-port.h>
#define __raw_writeb(v,a) (__chk_io_ptr(a), *(volatile u8 __force *)(a) = (v))
diff --git a/fs/iomap.c b/fs/iomap.c
index d6bc98ae8d35..5bc172f3dfe8 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -116,6 +116,12 @@ iomap_page_create(struct inode *inode, struct page *page)
atomic_set(&iop->read_count, 0);
atomic_set(&iop->write_count, 0);
bitmap_zero(iop->uptodate, PAGE_SIZE / SECTOR_SIZE);
+
+ /*
+ * migrate_page_move_mapping() assumes that pages with private data have
+ * their count elevated by 1.
+ */
+ get_page(page);
set_page_private(page, (unsigned long)iop);
SetPagePrivate(page);
return iop;
@@ -132,6 +138,7 @@ iomap_page_release(struct page *page)
WARN_ON_ONCE(atomic_read(&iop->write_count));
ClearPagePrivate(page);
set_page_private(page, 0);
+ put_page(page);
kfree(iop);
}
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index cd58939dc977..7a85e609fc27 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1566,7 +1566,6 @@ static int userfaultfd_unregister(struct userfaultfd_ctx *ctx,
cond_resched();
BUG_ON(!vma_can_userfault(vma));
- WARN_ON(!(vma->vm_flags & VM_MAYWRITE));
/*
* Nothing to do: this vma is already registered into this
@@ -1575,6 +1574,8 @@ static int userfaultfd_unregister(struct userfaultfd_ctx *ctx,
if (!vma->vm_userfaultfd_ctx.ctx)
goto skip;
+ WARN_ON(!(vma->vm_flags & VM_MAYWRITE));
+
if (vma->vm_start > start)
start = vma->vm_start;
vma_end = min(end, vma->vm_end);
diff --git a/include/asm-generic/fixmap.h b/include/asm-generic/fixmap.h
index 827e4d3bbc7a..8cc7b09c1bc7 100644
--- a/include/asm-generic/fixmap.h
+++ b/include/asm-generic/fixmap.h
@@ -16,6 +16,7 @@
#define __ASM_GENERIC_FIXMAP_H
#include <linux/bug.h>
+#include <linux/mm_types.h>
#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 5ed8f6292a53..2c471a2c43fa 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -206,6 +206,11 @@ struct page {
#endif
} _struct_page_alignment;
+/*
+ * Used for sizing the vmemmap region on some architectures
+ */
+#define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page)))
+
#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK)
#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 847705a6d0ec..db023a92f3a4 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -783,6 +783,12 @@ void memory_present(int nid, unsigned long start, unsigned long end);
static inline void memory_present(int nid, unsigned long start, unsigned long end) {}
#endif
+#if defined(CONFIG_SPARSEMEM)
+void memblocks_present(void);
+#else
+static inline void memblocks_present(void) {}
+#endif
+
#ifdef CONFIG_HAVE_MEMORYLESS_NODES
int local_memory_node(int node_id);
#else
diff --git a/init/Kconfig b/init/Kconfig
index cf5b5a0dcbc2..ed9352513c32 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -515,8 +515,8 @@ config PSI_DEFAULT_DISABLED
depends on PSI
help
If set, pressure stall information tracking will be disabled
- per default but can be enabled through passing psi_enable=1
- on the kernel commandline during boot.
+ per default but can be enabled through passing psi=1 on the
+ kernel commandline during boot.
endmenu # "CPU/Task time and stats accounting"
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 705a3e9cc910..a80832487981 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1248,10 +1248,11 @@ void free_huge_page(struct page *page)
(struct hugepage_subpool *)page_private(page);
bool restore_reserve;
- set_page_private(page, 0);
- page->mapping = NULL;
VM_BUG_ON_PAGE(page_count(page), page);
VM_BUG_ON_PAGE(page_mapcount(page), page);
+
+ set_page_private(page, 0);
+ page->mapping = NULL;
restore_reserve = PagePrivate(page);
ClearPagePrivate(page);
diff --git a/mm/memblock.c b/mm/memblock.c
index 9a2d5ae81ae1..81ae63ca78d0 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1727,7 +1727,7 @@ static int __init_memblock memblock_search(struct memblock_type *type, phys_addr
return -1;
}
-bool __init memblock_is_reserved(phys_addr_t addr)
+bool __init_memblock memblock_is_reserved(phys_addr_t addr)
{
return memblock_search(&memblock.reserved, addr) != -1;
}
diff --git a/mm/sparse.c b/mm/sparse.c
index 33307fc05c4d..3abc8cc50201 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -240,6 +240,22 @@ void __init memory_present(int nid, unsigned long start, unsigned long end)
}
/*
+ * Mark all memblocks as present using memory_present(). This is a
+ * convienence function that is useful for a number of arches
+ * to mark all of the systems memory as present during initialization.
+ */
+void __init memblocks_present(void)
+{
+ struct memblock_region *reg;
+
+ for_each_memblock(memory, reg) {
+ memory_present(memblock_get_region_node(reg),
+ memblock_region_memory_base_pfn(reg),
+ memblock_region_memory_end_pfn(reg));
+ }
+}
+
+/*
* Subtle, we encode the real pfn into the mem_map such that
* the identity pfn - section_mem_map will return the actual
* physical page frame number.
diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 8081b6cf67d2..34414c6efad6 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -47,8 +47,8 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
$xs = "[0-9a-f ]"; # hex character or space
$funcre = qr/^$x* <(.*)>:$/;
if ($arch eq 'aarch64') {
- #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp,#-80]!
- $re = qr/^.*stp.*sp,\#-([0-9]{1,8})\]\!/o;
+ #ffffffc0006325cc: a9bb7bfd stp x29, x30, [sp, #-80]!
+ $re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;
} elsif ($arch eq 'arm') {
#c0008ffc: e24dd064 sub sp, sp, #100 ; 0x64
$re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
diff --git a/scripts/spdxcheck.py b/scripts/spdxcheck.py
index 5056fb3b897d..e559c6294c39 100755
--- a/scripts/spdxcheck.py
+++ b/scripts/spdxcheck.py
@@ -168,6 +168,7 @@ class id_parser(object):
self.curline = 0
try:
for line in fd:
+ line = line.decode(locale.getpreferredencoding(False), errors='ignore')
self.curline += 1
if self.curline > maxlines:
break
@@ -249,12 +250,13 @@ if __name__ == '__main__':
try:
if len(args.path) and args.path[0] == '-':
- parser.parse_lines(sys.stdin, args.maxlines, '-')
+ stdin = os.fdopen(sys.stdin.fileno(), 'rb')
+ parser.parse_lines(stdin, args.maxlines, '-')
else:
if args.path:
for p in args.path:
if os.path.isfile(p):
- parser.parse_lines(open(p), args.maxlines, p)
+ parser.parse_lines(open(p, 'rb'), args.maxlines, p)
elif os.path.isdir(p):
scan_git_subtree(repo.head.reference.commit.tree, p)
else: