19 files changed, 104 insertions, 34 deletions

diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 000e6e91f6a0..3667d20e997f 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -62,9 +62,11 @@ SECTIONS
 
         . = ALIGN(PAGE_SIZE);
         __start_ro_after_init = .;
+        __start_data_ro_after_init = .;
         .data..ro_after_init : {
                  *(.data..ro_after_init)
         }
+        __end_data_ro_after_init = .;
         EXCEPTION_TABLE(16)
         . = ALIGN(PAGE_SIZE);
         __end_ro_after_init = .;
diff --git a/drivers/of/base.c b/drivers/of/base.c
index d687e6de24a0..a0bccb54a9bd 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2077,8 +2077,6 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
                         name = of_get_property(of_aliases, "stdout", NULL);
                 if (name)
                         of_stdout = of_find_node_opts_by_path(name, &of_stdout_options);
-                if (of_stdout)
-                        console_set_by_of();
         }
 
         if (!of_aliases)
diff --git a/fs/coredump.c b/fs/coredump.c
index 281b768000e6..eb9c92c9b20f 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -1,6 +1,7 @@
 #include <linux/slab.h>
 #include <linux/file.h>
 #include <linux/fdtable.h>
+#include <linux/freezer.h>
 #include <linux/mm.h>
 #include <linux/stat.h>
 #include <linux/fcntl.h>
@@ -423,7 +424,9 @@ static int coredump_wait(int exit_code, struct core_state *core_state)
         if (core_waiters > 0) {
                 struct core_thread *ptr;
 
+                freezer_do_not_count();
                 wait_for_completion(&core_state->startup);
+                freezer_count();
                 /*
                  * Wait for all the threads to become inactive, so that
                  * all the thread context (extended register state, like
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index e7054e2ac922..3ecb9f337b7d 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -3699,7 +3699,7 @@ static void ocfs2_dx_dir_transfer_leaf(struct inode *dir, u32 split_hash,
 static int ocfs2_dx_dir_rebalance_credits(struct ocfs2_super *osb,
                                           struct ocfs2_dx_root_block *dx_root)
 {
-        int credits = ocfs2_clusters_to_blocks(osb->sb, 2);
+        int credits = ocfs2_clusters_to_blocks(osb->sb, 3);
 
         credits += ocfs2_calc_extend_credits(osb->sb, &dx_root->dr_list);
         credits += ocfs2_quota_trans_credits(osb->sb);
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index af0254c09424..4df64a1fc09e 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -14,6 +14,8 @@
  * [_sdata, _edata]: contains .data.* sections, may also contain .rodata.*
  *                   and/or .init.* sections.
  * [__start_rodata, __end_rodata]: contains .rodata.* sections
+ * [__start_data_ro_after_init, __end_data_ro_after_init]:
+ *                   contains data.ro_after_init section
  * [__init_begin, __init_end]: contains .init.* sections, but .init.text.*
  *                   may be out of this range on some architectures.
  * [_sinittext, _einittext]: contains .init.text.* sections
@@ -31,6 +33,7 @@ extern char _data[], _sdata[], _edata[];
 extern char __bss_start[], __bss_stop[];
 extern char __init_begin[], __init_end[];
 extern char _sinittext[], _einittext[];
+extern char __start_data_ro_after_init[], __end_data_ro_after_init[];
 extern char _end[];
 extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
 extern char __kprobes_text_start[], __kprobes_text_end[];
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 30747960bc54..31e1d639abed 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -259,7 +259,10 @@
  * own by defining an empty RO_AFTER_INIT_DATA.
  */
 #ifndef RO_AFTER_INIT_DATA
-#define RO_AFTER_INIT_DATA *(.data..ro_after_init)
+#define RO_AFTER_INIT_DATA                                              \
+        __start_data_ro_after_init = .;                                 \
+        *(.data..ro_after_init)                                         \
+        __end_data_ro_after_init = .;
 #endif
 
 /*
diff --git a/include/linux/console.h b/include/linux/console.h
index 3672809234a7..d530c4627e54 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -173,12 +173,6 @@ static inline void console_sysfs_notify(void)
 #endif
 extern bool console_suspend_enabled;
 
-#ifdef CONFIG_OF
-extern void console_set_by_of(void);
-#else
-static inline void console_set_by_of(void) {}
-#endif
-
 /* Suspend and resume console messages over PM events */
 extern void suspend_console(void);
 extern void resume_console(void);
diff --git a/include/linux/frontswap.h b/include/linux/frontswap.h
index c46d2aa16d81..1d18af034554 100644
--- a/include/linux/frontswap.h
+++ b/include/linux/frontswap.h
@@ -106,8 +106,9 @@ static inline void frontswap_invalidate_area(unsigned type)
 
 static inline void frontswap_init(unsigned type, unsigned long *map)
 {
-        if (frontswap_enabled())
-                __frontswap_init(type, map);
+#ifdef CONFIG_FRONTSWAP
+        __frontswap_init(type, map);
+#endif
 }
 
 #endif /* _LINUX_FRONTSWAP_H */
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index de08fc90baaf..5028f4fd504a 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -253,17 +253,6 @@ static int preferred_console = -1;
 int console_set_on_cmdline;
 EXPORT_SYMBOL(console_set_on_cmdline);
 
-#ifdef CONFIG_OF
-static bool of_specified_console;
-
-void console_set_by_of(void)
-{
-        of_specified_console = true;
-}
-#else
-# define of_specified_console false
-#endif
-
 /* Flag: console code may call schedule() */
 static int console_may_schedule;
 
@@ -2657,7 +2646,7 @@ void register_console(struct console *newcon)
          *      didn't select a console we take the first one
          *      that registers here.
          */
-        if (preferred_console < 0 && !of_specified_console) {
+        if (preferred_console < 0) {
                 if (newcon->index < 0)
                         newcon->index = 0;
                 if (newcon->setup == NULL ||
diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index 4d830e299989..f87d138e9672 100644
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -192,6 +192,7 @@ void depot_fetch_stack(depot_stack_handle_t handle, struct stack_trace *trace)
         trace->entries = stack->entries;
         trace->skip = 0;
 }
+EXPORT_SYMBOL_GPL(depot_fetch_stack);
 
 /**
  * depot_save_stack - save stack in a stack depot.
@@ -283,3 +284,4 @@ exit:
 fast_exit:
         return retval;
 }
+EXPORT_SYMBOL_GPL(depot_save_stack);
diff --git a/mm/cma.c b/mm/cma.c
index 384c2cb51b56..c960459eda7e 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -385,6 +385,9 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align)
         bitmap_maxno = cma_bitmap_maxno(cma);
         bitmap_count = cma_bitmap_pages_to_bits(cma, count);
 
+        if (bitmap_count > bitmap_maxno)
+                return NULL;
+
         for (;;) {
                 mutex_lock(&cma->lock);
                 bitmap_no = bitmap_find_next_zero_area_off(cma->bitmap,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index ec49d9ef1eef..418bf01a50ed 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1826,11 +1826,17 @@ static void return_unused_surplus_pages(struct hstate *h,
  * is not the case is if a reserve map was changed between calls.  It
  * is the responsibility of the caller to notice the difference and
  * take appropriate action.
+ *
+ * vma_add_reservation is used in error paths where a reservation must
+ * be restored when a newly allocated huge page must be freed.  It is
+ * to be called after calling vma_needs_reservation to determine if a
+ * reservation exists.
  */
 enum vma_resv_mode {
         VMA_NEEDS_RESV,
         VMA_COMMIT_RESV,
         VMA_END_RESV,
+        VMA_ADD_RESV,
 };
 static long __vma_reservation_common(struct hstate *h,
                                 struct vm_area_struct *vma, unsigned long addr,
@@ -1856,6 +1862,14 @@ static long __vma_reservation_common(struct hstate *h,
                 region_abort(resv, idx, idx + 1);
                 ret = 0;
                 break;
+        case VMA_ADD_RESV:
+                if (vma->vm_flags & VM_MAYSHARE)
+                        ret = region_add(resv, idx, idx + 1);
+                else {
+                        region_abort(resv, idx, idx + 1);
+                        ret = region_del(resv, idx, idx + 1);
+                }
+                break;
         default:
                 BUG();
         }
@@ -1903,6 +1917,56 @@ static void vma_end_reservation(struct hstate *h,
         (void)__vma_reservation_common(h, vma, addr, VMA_END_RESV);
 }
 
+static long vma_add_reservation(struct hstate *h,
+                        struct vm_area_struct *vma, unsigned long addr)
+{
+        return __vma_reservation_common(h, vma, addr, VMA_ADD_RESV);
+}
+
+/*
+ * This routine is called to restore a reservation on error paths.  In the
+ * specific error paths, a huge page was allocated (via alloc_huge_page)
+ * and is about to be freed.  If a reservation for the page existed,
+ * alloc_huge_page would have consumed the reservation and set PagePrivate
+ * in the newly allocated page.  When the page is freed via free_huge_page,
+ * the global reservation count will be incremented if PagePrivate is set.
+ * However, free_huge_page can not adjust the reserve map.  Adjust the
+ * reserve map here to be consistent with global reserve count adjustments
+ * to be made by free_huge_page.
+ */
+static void restore_reserve_on_error(struct hstate *h,
+                        struct vm_area_struct *vma, unsigned long address,
+                        struct page *page)
+{
+        if (unlikely(PagePrivate(page))) {
+                long rc = vma_needs_reservation(h, vma, address);
+
+                if (unlikely(rc < 0)) {
+                        /*
+                         * Rare out of memory condition in reserve map
+                         * manipulation.  Clear PagePrivate so that
+                         * global reserve count will not be incremented
+                         * by free_huge_page.  This will make it appear
+                         * as though the reservation for this page was
+                         * consumed.  This may prevent the task from
+                         * faulting in the page at a later time.  This
+                         * is better than inconsistent global huge page
+                         * accounting of reserve counts.
+                         */
+                        ClearPagePrivate(page);
+                } else if (rc) {
+                        rc = vma_add_reservation(h, vma, address);
+                        if (unlikely(rc < 0))
+                                /*
+                                 * See above comment about rare out of
+                                 * memory condition.
+                                 */
+                                ClearPagePrivate(page);
+                } else
+                        vma_end_reservation(h, vma, address);
+        }
+}
+
 struct page *alloc_huge_page(struct vm_area_struct *vma,
                                     unsigned long addr, int avoid_reserve)
 {
@@ -3498,6 +3562,7 @@ retry_avoidcopy:
         spin_unlock(ptl);
         mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
 out_release_all:
+        restore_reserve_on_error(h, vma, address, new_page);
         put_page(new_page);
 out_release_old:
         put_page(old_page);
@@ -3680,6 +3745,7 @@ backout:
         spin_unlock(ptl);
 backout_unlocked:
         unlock_page(page);
+        restore_reserve_on_error(h, vma, address, page);
         put_page(page);
         goto out;
 }
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index e5355a5b423f..d1380ed93fdf 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1414,6 +1414,7 @@ static void kmemleak_scan(void)
         /* data/bss scanning */
         scan_large_block(_sdata, _edata);
         scan_large_block(__bss_start, __bss_stop);
+        scan_large_block(__start_data_ro_after_init, __end_data_ro_after_init);
 
 #ifdef CONFIG_SMP
         /* per-cpu sections scanning */
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index de88f33519c0..19e796d36a62 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1112,10 +1112,10 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
         }
 
         if (!PageHuge(p) && PageTransHuge(hpage)) {
-                lock_page(hpage);
-                if (!PageAnon(hpage) || unlikely(split_huge_page(hpage))) {
-                        unlock_page(hpage);
-                        if (!PageAnon(hpage))
+                lock_page(p);
+                if (!PageAnon(p) || unlikely(split_huge_page(p))) {
+                        unlock_page(p);
+                        if (!PageAnon(p))
                                 pr_err("Memory failure: %#lx: non anonymous thp\n",
                                         pfn);
                         else
@@ -1126,9 +1126,7 @@ int memory_failure(unsigned long pfn, int trapno, int flags)
                         put_hwpoison_page(p);
                         return -EBUSY;
                 }
-                unlock_page(hpage);
-                get_hwpoison_page(p);
-                put_hwpoison_page(hpage);
+                unlock_page(p);
                 VM_BUG_ON_PAGE(!page_count(p), p);
                 hpage = compound_head(p);
         }
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 072d791dce2d..6de9440e3ae2 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3658,7 +3658,7 @@ retry:
         /* Make sure we know about allocations which stall for too long */
         if (time_after(jiffies, alloc_start + stall_timeout)) {
                 warn_alloc(gfp_mask,
-                        "page alloction stalls for %ums, order:%u\n",
+                        "page allocation stalls for %ums, order:%u",
                         jiffies_to_msecs(jiffies-alloc_start), order);
                 stall_timeout += 10 * HZ;
         }
diff --git a/mm/shmem.c b/mm/shmem.c
index ad7813d73ea7..166ebf5d2bce 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1483,6 +1483,8 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp,
         copy_highpage(newpage, oldpage);
         flush_dcache_page(newpage);
 
+        __SetPageLocked(newpage);
+        __SetPageSwapBacked(newpage);
         SetPageUptodate(newpage);
         set_page_private(newpage, swap_index);
         SetPageSwapCache(newpage);
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 71f0b28a1bec..329b03843863 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -533,8 +533,8 @@ void memcg_create_kmem_cache(struct mem_cgroup *memcg,
 
         s = create_cache(cache_name, root_cache->object_size,
                          root_cache->size, root_cache->align,
-                         root_cache->flags, root_cache->ctor,
-                         memcg, root_cache);
+                         root_cache->flags & CACHE_CREATE_MASK,
+                         root_cache->ctor, memcg, root_cache);
         /*
          * If we could not create a memcg cache, do not complain, because
          * that's not critical at all as we can always proceed with the root
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 2210de290b54..f30438970cd1 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2224,6 +2224,8 @@ static unsigned long read_swap_header(struct swap_info_struct *p,
                 swab32s(&swap_header->info.version);
                 swab32s(&swap_header->info.last_page);
                 swab32s(&swap_header->info.nr_badpages);
+                if (swap_header->info.nr_badpages > MAX_SWAP_BADPAGES)
+                        return 0;
                 for (i = 0; i < swap_header->info.nr_badpages; i++)
                         swab32s(&swap_header->info.badpages[i]);
         }
diff --git a/scripts/bloat-o-meter b/scripts/bloat-o-meter
index 19f5adfd877d..d9ff038c1b28 100755
--- a/scripts/bloat-o-meter
+++ b/scripts/bloat-o-meter
@@ -8,6 +8,9 @@
 # of the GNU General Public License, incorporated herein by reference.
 
 import sys, os, re
+from signal import signal, SIGPIPE, SIG_DFL
+
+signal(SIGPIPE, SIG_DFL)
 
 if len(sys.argv) != 3:
     sys.stderr.write("usage: %s file1 file2\n" % sys.argv[0])