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authorLinus Torvalds <torvalds@linux-foundation.org>2020-04-10 17:57:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-10 17:57:48 -0700
commit5b8b9d0c6d0e0f1993c6c56deaf9646942c49d94 (patch)
treeeaf00472d34b1f690eea209a2bcfb8e30f53a5b7 /mm
parentca6151a9788e2cbb1a7b5d320dcf4f16a3b64477 (diff)
parent89163f93c6f969da5811af5377cc10173583123b (diff)
downloadlinux-5b8b9d0c6d0e0f1993c6c56deaf9646942c49d94.tar.bz2
Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton: - Almost all of the rest of MM (memcg, slab-generic, slab, pagealloc, gup, hugetlb, pagemap, memremap) - Various other things (hfs, ocfs2, kmod, misc, seqfile) * akpm: (34 commits) ipc/util.c: sysvipc_find_ipc() should increase position index kernel/gcov/fs.c: gcov_seq_next() should increase position index fs/seq_file.c: seq_read(): add info message about buggy .next functions drivers/dma/tegra20-apb-dma.c: fix platform_get_irq.cocci warnings change email address for Pali Rohár selftests: kmod: test disabling module autoloading selftests: kmod: fix handling test numbers above 9 docs: admin-guide: document the kernel.modprobe sysctl fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once() kmod: make request_module() return an error when autoloading is disabled mm/memremap: set caching mode for PCI P2PDMA memory to WC mm/memory_hotplug: add pgprot_t to mhp_params powerpc/mm: thread pgprot_t through create_section_mapping() x86/mm: introduce __set_memory_prot() x86/mm: thread pgprot_t through init_memory_mapping() mm/memory_hotplug: rename mhp_restrictions to mhp_params mm/memory_hotplug: drop the flags field from struct mhp_restrictions mm/special: create generic fallbacks for pte_special() and pte_mkspecial() mm/vma: introduce VM_ACCESS_FLAGS mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS ...
Diffstat (limited to 'mm')
-rw-r--r--mm/cma.c16
-rw-r--r--mm/hugetlb.c109
-rw-r--r--mm/memblock.c2
-rw-r--r--mm/memcontrol.c3
-rw-r--r--mm/memory.c168
-rw-r--r--mm/memory_hotplug.c11
-rw-r--r--mm/memremap.c17
-rw-r--r--mm/mmap.c4
-rw-r--r--mm/mprotect.c4
-rw-r--r--mm/page_alloc.c5
-rw-r--r--mm/slab_common.c2
11 files changed, 299 insertions, 42 deletions
diff --git a/mm/cma.c b/mm/cma.c
index be55d1988c67..0463ad2ce06b 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -220,7 +220,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
}
/**
- * cma_declare_contiguous() - reserve custom contiguous area
+ * cma_declare_contiguous_nid() - reserve custom contiguous area
* @base: Base address of the reserved area optional, use 0 for any
* @size: Size of the reserved area (in bytes),
* @limit: End address of the reserved memory (optional, 0 for any).
@@ -229,6 +229,7 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
* @fixed: hint about where to place the reserved area
* @name: The name of the area. See function cma_init_reserved_mem()
* @res_cma: Pointer to store the created cma region.
+ * @nid: nid of the free area to find, %NUMA_NO_NODE for any node
*
* This function reserves memory from early allocator. It should be
* called by arch specific code once the early allocator (memblock or bootmem)
@@ -238,10 +239,11 @@ int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
* If @fixed is true, reserve contiguous area at exactly @base. If false,
* reserve in range from @base to @limit.
*/
-int __init cma_declare_contiguous(phys_addr_t base,
+int __init cma_declare_contiguous_nid(phys_addr_t base,
phys_addr_t size, phys_addr_t limit,
phys_addr_t alignment, unsigned int order_per_bit,
- bool fixed, const char *name, struct cma **res_cma)
+ bool fixed, const char *name, struct cma **res_cma,
+ int nid)
{
phys_addr_t memblock_end = memblock_end_of_DRAM();
phys_addr_t highmem_start;
@@ -336,14 +338,14 @@ int __init cma_declare_contiguous(phys_addr_t base,
* memory in case of failure.
*/
if (base < highmem_start && limit > highmem_start) {
- addr = memblock_phys_alloc_range(size, alignment,
- highmem_start, limit);
+ addr = memblock_alloc_range_nid(size, alignment,
+ highmem_start, limit, nid, false);
limit = highmem_start;
}
if (!addr) {
- addr = memblock_phys_alloc_range(size, alignment, base,
- limit);
+ addr = memblock_alloc_range_nid(size, alignment, base,
+ limit, nid, false);
if (!addr) {
ret = -ENOMEM;
goto err;
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f5fb53fdfa02..cd459155d28a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -28,6 +28,7 @@
#include <linux/jhash.h>
#include <linux/numa.h>
#include <linux/llist.h>
+#include <linux/cma.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@@ -44,6 +45,9 @@
int hugetlb_max_hstate __read_mostly;
unsigned int default_hstate_idx;
struct hstate hstates[HUGE_MAX_HSTATE];
+
+static struct cma *hugetlb_cma[MAX_NUMNODES];
+
/*
* Minimum page order among possible hugepage sizes, set to a proper value
* at boot time.
@@ -1228,6 +1232,14 @@ static void destroy_compound_gigantic_page(struct page *page,
static void free_gigantic_page(struct page *page, unsigned int order)
{
+ /*
+ * If the page isn't allocated using the cma allocator,
+ * cma_release() returns false.
+ */
+ if (IS_ENABLED(CONFIG_CMA) &&
+ cma_release(hugetlb_cma[page_to_nid(page)], page, 1 << order))
+ return;
+
free_contig_range(page_to_pfn(page), 1 << order);
}
@@ -1237,6 +1249,21 @@ static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask,
{
unsigned long nr_pages = 1UL << huge_page_order(h);
+ if (IS_ENABLED(CONFIG_CMA)) {
+ struct page *page;
+ int node;
+
+ for_each_node_mask(node, *nodemask) {
+ if (!hugetlb_cma[node])
+ continue;
+
+ page = cma_alloc(hugetlb_cma[node], nr_pages,
+ huge_page_order(h), true);
+ if (page)
+ return page;
+ }
+ }
+
return alloc_contig_pages(nr_pages, gfp_mask, nid, nodemask);
}
@@ -1281,8 +1308,14 @@ static void update_and_free_page(struct hstate *h, struct page *page)
set_compound_page_dtor(page, NULL_COMPOUND_DTOR);
set_page_refcounted(page);
if (hstate_is_gigantic(h)) {
+ /*
+ * Temporarily drop the hugetlb_lock, because
+ * we might block in free_gigantic_page().
+ */
+ spin_unlock(&hugetlb_lock);
destroy_compound_gigantic_page(page, huge_page_order(h));
free_gigantic_page(page, huge_page_order(h));
+ spin_lock(&hugetlb_lock);
} else {
__free_pages(page, huge_page_order(h));
}
@@ -2539,6 +2572,10 @@ static void __init hugetlb_hstate_alloc_pages(struct hstate *h)
for (i = 0; i < h->max_huge_pages; ++i) {
if (hstate_is_gigantic(h)) {
+ if (IS_ENABLED(CONFIG_CMA) && hugetlb_cma[0]) {
+ pr_warn_once("HugeTLB: hugetlb_cma is enabled, skip boot time allocation\n");
+ break;
+ }
if (!alloc_bootmem_huge_page(h))
break;
} else if (!alloc_pool_huge_page(h,
@@ -3194,6 +3231,7 @@ static int __init hugetlb_init(void)
default_hstate.max_huge_pages = default_hstate_max_huge_pages;
}
+ hugetlb_cma_check();
hugetlb_init_hstates();
gather_bootmem_prealloc();
report_hugepages();
@@ -5506,3 +5544,74 @@ void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason)
spin_unlock(&hugetlb_lock);
}
}
+
+#ifdef CONFIG_CMA
+static unsigned long hugetlb_cma_size __initdata;
+static bool cma_reserve_called __initdata;
+
+static int __init cmdline_parse_hugetlb_cma(char *p)
+{
+ hugetlb_cma_size = memparse(p, &p);
+ return 0;
+}
+
+early_param("hugetlb_cma", cmdline_parse_hugetlb_cma);
+
+void __init hugetlb_cma_reserve(int order)
+{
+ unsigned long size, reserved, per_node;
+ int nid;
+
+ cma_reserve_called = true;
+
+ if (!hugetlb_cma_size)
+ return;
+
+ if (hugetlb_cma_size < (PAGE_SIZE << order)) {
+ pr_warn("hugetlb_cma: cma area should be at least %lu MiB\n",
+ (PAGE_SIZE << order) / SZ_1M);
+ return;
+ }
+
+ /*
+ * If 3 GB area is requested on a machine with 4 numa nodes,
+ * let's allocate 1 GB on first three nodes and ignore the last one.
+ */
+ per_node = DIV_ROUND_UP(hugetlb_cma_size, nr_online_nodes);
+ pr_info("hugetlb_cma: reserve %lu MiB, up to %lu MiB per node\n",
+ hugetlb_cma_size / SZ_1M, per_node / SZ_1M);
+
+ reserved = 0;
+ for_each_node_state(nid, N_ONLINE) {
+ int res;
+
+ size = min(per_node, hugetlb_cma_size - reserved);
+ size = round_up(size, PAGE_SIZE << order);
+
+ res = cma_declare_contiguous_nid(0, size, 0, PAGE_SIZE << order,
+ 0, false, "hugetlb",
+ &hugetlb_cma[nid], nid);
+ if (res) {
+ pr_warn("hugetlb_cma: reservation failed: err %d, node %d",
+ res, nid);
+ continue;
+ }
+
+ reserved += size;
+ pr_info("hugetlb_cma: reserved %lu MiB on node %d\n",
+ size / SZ_1M, nid);
+
+ if (reserved >= hugetlb_cma_size)
+ break;
+ }
+}
+
+void __init hugetlb_cma_check(void)
+{
+ if (!hugetlb_cma_size || cma_reserve_called)
+ return;
+
+ pr_warn("hugetlb_cma: the option isn't supported by current arch\n");
+}
+
+#endif /* CONFIG_CMA */
diff --git a/mm/memblock.c b/mm/memblock.c
index 4d06bbaded0f..c79ba6f9920c 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1349,7 +1349,7 @@ __next_mem_pfn_range_in_zone(u64 *idx, struct zone *zone,
* Return:
* Physical address of allocated memory block on success, %0 on failure.
*/
-static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
+phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size,
phys_addr_t align, phys_addr_t start,
phys_addr_t end, int nid,
bool exact_nid)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 05b4ec2c6499..5beea03dd58a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2336,6 +2336,9 @@ static unsigned long calculate_high_delay(struct mem_cgroup *memcg,
usage = page_counter_read(&memcg->memory);
high = READ_ONCE(memcg->high);
+ if (usage <= high)
+ continue;
+
/*
* Prevent division by 0 in overage calculation by acting as if
* it was a threshold of 1 page
diff --git a/mm/memory.c b/mm/memory.c
index 19874d133a66..f703fe8c8346 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1419,8 +1419,7 @@ void zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
}
EXPORT_SYMBOL_GPL(zap_vma_ptes);
-pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
- spinlock_t **ptl)
+static pmd_t *walk_to_pmd(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
p4d_t *p4d;
@@ -1439,9 +1438,40 @@ pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
return NULL;
VM_BUG_ON(pmd_trans_huge(*pmd));
+ return pmd;
+}
+
+pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
+ spinlock_t **ptl)
+{
+ pmd_t *pmd = walk_to_pmd(mm, addr);
+
+ if (!pmd)
+ return NULL;
return pte_alloc_map_lock(mm, pmd, addr, ptl);
}
+static int validate_page_before_insert(struct page *page)
+{
+ if (PageAnon(page) || PageSlab(page) || page_has_type(page))
+ return -EINVAL;
+ flush_dcache_page(page);
+ return 0;
+}
+
+static int insert_page_into_pte_locked(struct mm_struct *mm, pte_t *pte,
+ unsigned long addr, struct page *page, pgprot_t prot)
+{
+ if (!pte_none(*pte))
+ return -EBUSY;
+ /* Ok, finally just insert the thing.. */
+ get_page(page);
+ inc_mm_counter_fast(mm, mm_counter_file(page));
+ page_add_file_rmap(page, false);
+ set_pte_at(mm, addr, pte, mk_pte(page, prot));
+ return 0;
+}
+
/*
* This is the old fallback for page remapping.
*
@@ -1457,31 +1487,135 @@ static int insert_page(struct vm_area_struct *vma, unsigned long addr,
pte_t *pte;
spinlock_t *ptl;
- retval = -EINVAL;
- if (PageAnon(page) || PageSlab(page) || page_has_type(page))
+ retval = validate_page_before_insert(page);
+ if (retval)
goto out;
retval = -ENOMEM;
- flush_dcache_page(page);
pte = get_locked_pte(mm, addr, &ptl);
if (!pte)
goto out;
- retval = -EBUSY;
- if (!pte_none(*pte))
- goto out_unlock;
-
- /* Ok, finally just insert the thing.. */
- get_page(page);
- inc_mm_counter_fast(mm, mm_counter_file(page));
- page_add_file_rmap(page, false);
- set_pte_at(mm, addr, pte, mk_pte(page, prot));
-
- retval = 0;
-out_unlock:
+ retval = insert_page_into_pte_locked(mm, pte, addr, page, prot);
pte_unmap_unlock(pte, ptl);
out:
return retval;
}
+#ifdef pte_index
+static int insert_page_in_batch_locked(struct mm_struct *mm, pmd_t *pmd,
+ unsigned long addr, struct page *page, pgprot_t prot)
+{
+ int err;
+
+ if (!page_count(page))
+ return -EINVAL;
+ err = validate_page_before_insert(page);
+ return err ? err : insert_page_into_pte_locked(
+ mm, pte_offset_map(pmd, addr), addr, page, prot);
+}
+
+/* insert_pages() amortizes the cost of spinlock operations
+ * when inserting pages in a loop. Arch *must* define pte_index.
+ */
+static int insert_pages(struct vm_area_struct *vma, unsigned long addr,
+ struct page **pages, unsigned long *num, pgprot_t prot)
+{
+ pmd_t *pmd = NULL;
+ spinlock_t *pte_lock = NULL;
+ struct mm_struct *const mm = vma->vm_mm;
+ unsigned long curr_page_idx = 0;
+ unsigned long remaining_pages_total = *num;
+ unsigned long pages_to_write_in_pmd;
+ int ret;
+more:
+ ret = -EFAULT;
+ pmd = walk_to_pmd(mm, addr);
+ if (!pmd)
+ goto out;
+
+ pages_to_write_in_pmd = min_t(unsigned long,
+ remaining_pages_total, PTRS_PER_PTE - pte_index(addr));
+
+ /* Allocate the PTE if necessary; takes PMD lock once only. */
+ ret = -ENOMEM;
+ if (pte_alloc(mm, pmd))
+ goto out;
+ pte_lock = pte_lockptr(mm, pmd);
+
+ while (pages_to_write_in_pmd) {
+ int pte_idx = 0;
+ const int batch_size = min_t(int, pages_to_write_in_pmd, 8);
+
+ spin_lock(pte_lock);
+ for (; pte_idx < batch_size; ++pte_idx) {
+ int err = insert_page_in_batch_locked(mm, pmd,
+ addr, pages[curr_page_idx], prot);
+ if (unlikely(err)) {
+ spin_unlock(pte_lock);
+ ret = err;
+ remaining_pages_total -= pte_idx;
+ goto out;
+ }
+ addr += PAGE_SIZE;
+ ++curr_page_idx;
+ }
+ spin_unlock(pte_lock);
+ pages_to_write_in_pmd -= batch_size;
+ remaining_pages_total -= batch_size;
+ }
+ if (remaining_pages_total)
+ goto more;
+ ret = 0;
+out:
+ *num = remaining_pages_total;
+ return ret;
+}
+#endif /* ifdef pte_index */
+
+/**
+ * vm_insert_pages - insert multiple pages into user vma, batching the pmd lock.
+ * @vma: user vma to map to
+ * @addr: target start user address of these pages
+ * @pages: source kernel pages
+ * @num: in: number of pages to map. out: number of pages that were *not*
+ * mapped. (0 means all pages were successfully mapped).
+ *
+ * Preferred over vm_insert_page() when inserting multiple pages.
+ *
+ * In case of error, we may have mapped a subset of the provided
+ * pages. It is the caller's responsibility to account for this case.
+ *
+ * The same restrictions apply as in vm_insert_page().
+ */
+int vm_insert_pages(struct vm_area_struct *vma, unsigned long addr,
+ struct page **pages, unsigned long *num)
+{
+#ifdef pte_index
+ const unsigned long end_addr = addr + (*num * PAGE_SIZE) - 1;
+
+ if (addr < vma->vm_start || end_addr >= vma->vm_end)
+ return -EFAULT;
+ if (!(vma->vm_flags & VM_MIXEDMAP)) {
+ BUG_ON(down_read_trylock(&vma->vm_mm->mmap_sem));
+ BUG_ON(vma->vm_flags & VM_PFNMAP);
+ vma->vm_flags |= VM_MIXEDMAP;
+ }
+ /* Defer page refcount checking till we're about to map that page. */
+ return insert_pages(vma, addr, pages, num, vma->vm_page_prot);
+#else
+ unsigned long idx = 0, pgcount = *num;
+ int err;
+
+ for (; idx < pgcount; ++idx) {
+ err = vm_insert_page(vma, addr + (PAGE_SIZE * idx), pages[idx]);
+ if (err)
+ break;
+ }
+ *num = pgcount - idx;
+ return err;
+#endif /* ifdef pte_index */
+}
+EXPORT_SYMBOL(vm_insert_pages);
+
/**
* vm_insert_page - insert single page into user vma
* @vma: user vma to map to
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 635e8e286598..fc0aad0bc1f5 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -304,12 +304,15 @@ static int check_hotplug_memory_addressable(unsigned long pfn,
* add the new pages.
*/
int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages,
- struct mhp_restrictions *restrictions)
+ struct mhp_params *params)
{
const unsigned long end_pfn = pfn + nr_pages;
unsigned long cur_nr_pages;
int err;
- struct vmem_altmap *altmap = restrictions->altmap;
+ struct vmem_altmap *altmap = params->altmap;
+
+ if (WARN_ON_ONCE(!params->pgprot.pgprot))
+ return -EINVAL;
err = check_hotplug_memory_addressable(pfn, nr_pages);
if (err)
@@ -1002,7 +1005,7 @@ static int online_memory_block(struct memory_block *mem, void *arg)
*/
int __ref add_memory_resource(int nid, struct resource *res)
{
- struct mhp_restrictions restrictions = {};
+ struct mhp_params params = { .pgprot = PAGE_KERNEL };
u64 start, size;
bool new_node = false;
int ret;
@@ -1030,7 +1033,7 @@ int __ref add_memory_resource(int nid, struct resource *res)
new_node = ret;
/* call arch's memory hotadd */
- ret = arch_add_memory(nid, start, size, &restrictions);
+ ret = arch_add_memory(nid, start, size, &params);
if (ret < 0)
goto error;
diff --git a/mm/memremap.c b/mm/memremap.c
index bbf457c4f166..03e38b7a38f1 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -184,13 +184,13 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
{
struct resource *res = &pgmap->res;
struct dev_pagemap *conflict_pgmap;
- struct mhp_restrictions restrictions = {
+ struct mhp_params params = {
/*
* We do not want any optional features only our own memmap
*/
.altmap = pgmap_altmap(pgmap),
+ .pgprot = PAGE_KERNEL,
};
- pgprot_t pgprot = PAGE_KERNEL;
int error, is_ram;
bool need_devmap_managed = true;
@@ -217,7 +217,10 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
}
break;
case MEMORY_DEVICE_DEVDAX:
+ need_devmap_managed = false;
+ break;
case MEMORY_DEVICE_PCI_P2PDMA:
+ params.pgprot = pgprot_noncached(params.pgprot);
need_devmap_managed = false;
break;
default:
@@ -282,8 +285,8 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
if (nid < 0)
nid = numa_mem_id();
- error = track_pfn_remap(NULL, &pgprot, PHYS_PFN(res->start), 0,
- resource_size(res));
+ error = track_pfn_remap(NULL, &params.pgprot, PHYS_PFN(res->start),
+ 0, resource_size(res));
if (error)
goto err_pfn_remap;
@@ -302,7 +305,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
*/
if (pgmap->type == MEMORY_DEVICE_PRIVATE) {
error = add_pages(nid, PHYS_PFN(res->start),
- PHYS_PFN(resource_size(res)), &restrictions);
+ PHYS_PFN(resource_size(res)), &params);
} else {
error = kasan_add_zero_shadow(__va(res->start), resource_size(res));
if (error) {
@@ -311,7 +314,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
}
error = arch_add_memory(nid, res->start, resource_size(res),
- &restrictions);
+ &params);
}
if (!error) {
@@ -319,7 +322,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
zone = &NODE_DATA(nid)->node_zones[ZONE_DEVICE];
move_pfn_range_to_zone(zone, PHYS_PFN(res->start),
- PHYS_PFN(resource_size(res)), restrictions.altmap);
+ PHYS_PFN(resource_size(res)), params.altmap);
}
mem_hotplug_done();
diff --git a/mm/mmap.c b/mm/mmap.c
index 8d77dbbb80fe..f609e9ec4a25 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1224,7 +1224,7 @@ static int anon_vma_compatible(struct vm_area_struct *a, struct vm_area_struct *
return a->vm_end == b->vm_start &&
mpol_equal(vma_policy(a), vma_policy(b)) &&
a->vm_file == b->vm_file &&
- !((a->vm_flags ^ b->vm_flags) & ~(VM_READ|VM_WRITE|VM_EXEC|VM_SOFTDIRTY)) &&
+ !((a->vm_flags ^ b->vm_flags) & ~(VM_ACCESS_FLAGS | VM_SOFTDIRTY)) &&
b->vm_pgoff == a->vm_pgoff + ((b->vm_start - a->vm_start) >> PAGE_SHIFT);
}
@@ -2123,6 +2123,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
info.low_limit = mm->mmap_base;
info.high_limit = mmap_end;
info.align_mask = 0;
+ info.align_offset = 0;
return vm_unmapped_area(&info);
}
#endif
@@ -2164,6 +2165,7 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr,
info.low_limit = max(PAGE_SIZE, mmap_min_addr);
info.high_limit = arch_get_mmap_base(addr, mm->mmap_base);
info.align_mask = 0;
+ info.align_offset = 0;
addr = vm_unmapped_area(&info);
/*
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 1d823b050329..494192ca954b 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -419,7 +419,7 @@ mprotect_fixup(struct vm_area_struct *vma, struct vm_area_struct **pprev,
*/
if (arch_has_pfn_modify_check() &&
(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP)) &&
- (newflags & (VM_READ|VM_WRITE|VM_EXEC)) == 0) {
+ (newflags & VM_ACCESS_FLAGS) == 0) {
pgprot_t new_pgprot = vm_get_page_prot(newflags);
error = walk_page_range(current->mm, start, end,
@@ -598,7 +598,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len,
newflags |= (vma->vm_flags & ~mask_off_old_flags);
/* newflags >> 4 shift VM_MAY% in place of VM_% */
- if ((newflags & ~(newflags >> 4)) & (VM_READ | VM_WRITE | VM_EXEC)) {
+ if ((newflags & ~(newflags >> 4)) & VM_ACCESS_FLAGS) {
error = -EACCES;
goto out;
}
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 114c56c3685d..69827d4fa052 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -103,8 +103,8 @@ struct pcpu_drain {
struct zone *zone;
struct work_struct work;
};
-DEFINE_MUTEX(pcpu_drain_mutex);
-DEFINE_PER_CPU(struct pcpu_drain, pcpu_drain);
+static DEFINE_MUTEX(pcpu_drain_mutex);
+static DEFINE_PER_CPU(struct pcpu_drain, pcpu_drain);
#ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
volatile unsigned long latent_entropy __latent_entropy;
@@ -3224,6 +3224,7 @@ int __isolate_free_page(struct page *page, unsigned int order)
* __putback_isolated_page - Return a now-isolated page back where we got it
* @page: Page that was isolated
* @order: Order of the isolated page
+ * @mt: The page's pageblock's migratetype
*
* This function is meant to return a page pulled from the free lists via
* __isolate_free_page back to the free lists they were pulled from.
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 93ec4a574d8d..23c7500eea7d 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -731,7 +731,7 @@ static void kmemcg_rcufn(struct rcu_head *head)
/*
* We need to grab blocking locks. Bounce to ->work. The
* work item shares the space with the RCU head and can't be
- * initialized eariler.
+ * initialized earlier.
*/
INIT_WORK(&s->memcg_params.work, kmemcg_workfn);
queue_work(memcg_kmem_cache_wq, &s->memcg_params.work);