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Commit a5d6e633 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'akpm' (fixes from Andrew) 

Merge patches from Andrew Morton:
 "13 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: place page->pmd_huge_pte to right union
  MAINTAINERS: add keyboard driver to Hyper-V file list
  x86, mm: do not leak page->ptl for pmd page tables
  ipc,shm: correct error return value in shmctl (SHM_UNLOCK)
  mm, mempolicy: silence gcc warning
  block/partitions/efi.c: fix bound check
  ARM: drivers/rtc/rtc-at91rm9200.c: disable interrupts at shutdown
  mm: hugetlbfs: fix hugetlbfs optimization
  kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS cleanly
  ipc,shm: fix shm_file deletion races
  mm: thp: give transparent hugepage code a separate copy_page
  checkpatch: fix "Use of uninitialized value" warnings
  configfs: fix race between dentry put and lookup
parents 78dc53c4 7aa555bf

Documentation/vm/split_page_table_lock

+3 −3
Original line number Diff line number Diff line
@@ -63,9 +63,9 @@ levels. 
PMD split lock enabling requires pgtable_pmd_page_ctor() call on PMD table

allocation and pgtable_pmd_page_dtor() on freeing.



Allocation usually happens in pmd_alloc_one(), freeing in pmd_free(), but

make sure you cover all PMD table allocation / freeing paths: i.e X86_PAE

preallocate few PMDs on pgd_alloc().

Allocation usually happens in pmd_alloc_one(), freeing in pmd_free() and

pmd_free_tlb(), but make sure you cover all PMD table allocation / freeing

paths: i.e X86_PAE preallocate few PMDs on pgd_alloc().



With everything in place you can set CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK.

MAINTAINERS

+1 −0
Original line number Diff line number Diff line
@@ -4065,6 +4065,7 @@ F: arch/x86/include/uapi/asm/hyperv.h 
F:	arch/x86/kernel/cpu/mshyperv.c

F:	drivers/hid/hid-hyperv.c

F:	drivers/hv/

F:	drivers/input/serio/hyperv-keyboard.c

F:	drivers/net/hyperv/

F:	drivers/scsi/storvsc_drv.c

F:	drivers/video/hyperv_fb.c

arch/x86/mm/pgtable.c

+3 −1
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte) 
#if PAGETABLE_LEVELS > 2

void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd)

{

	struct page *page = virt_to_page(pmd);

	paravirt_release_pmd(__pa(pmd) >> PAGE_SHIFT);

	/*

	 * NOTE! For PAE, any changes to the top page-directory-pointer-table
@@ -69,7 +70,8 @@ void ___pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd) 
#ifdef CONFIG_X86_PAE

	tlb->need_flush_all = 1;

#endif

	tlb_remove_page(tlb, virt_to_page(pmd));

	pgtable_pmd_page_dtor(page);

	tlb_remove_page(tlb, page);

}



#if PAGETABLE_LEVELS > 3

block/partitions/efi.c

+3 −2
Original line number Diff line number Diff line
@@ -96,6 +96,7 @@ 
 * - Code works, detects all the partitions.

 *

 ************************************************************/

#include <linux/kernel.h>

#include <linux/crc32.h>

#include <linux/ctype.h>

#include <linux/math64.h>
@@ -715,8 +716,8 @@ int efi_partition(struct parsed_partitions *state) 
		efi_guid_unparse(&ptes[i].unique_partition_guid, info->uuid);



		/* Naively convert UTF16-LE to 7 bits. */

		label_max = min(sizeof(info->volname) - 1,

				sizeof(ptes[i].partition_name));

		label_max = min(ARRAY_SIZE(info->volname) - 1,

				ARRAY_SIZE(ptes[i].partition_name));

		info->volname[label_max] = 0;

		while (label_count < label_max) {

			u8 c = ptes[i].partition_name[label_count] & 0xff;

drivers/block/null_blk.c

+4 −4
Original line number Diff line number Diff line
@@ -223,7 +223,7 @@ static void null_softirq_done_fn(struct request *rq) 
	blk_end_request_all(rq, 0);

}



#if defined(CONFIG_SMP) && defined(CONFIG_USE_GENERIC_SMP_HELPERS)

#ifdef CONFIG_SMP



static void null_ipi_cmd_end_io(void *data)

{
@@ -260,7 +260,7 @@ static void null_cmd_end_ipi(struct nullb_cmd *cmd) 
	put_cpu();

}



#endif /* CONFIG_SMP && CONFIG_USE_GENERIC_SMP_HELPERS */

#endif /* CONFIG_SMP */



static inline void null_handle_cmd(struct nullb_cmd *cmd)

{
@@ -270,7 +270,7 @@ static inline void null_handle_cmd(struct nullb_cmd *cmd) 
		end_cmd(cmd);

		break;

	case NULL_IRQ_SOFTIRQ:

#if defined(CONFIG_SMP) && defined(CONFIG_USE_GENERIC_SMP_HELPERS)

#ifdef CONFIG_SMP

		null_cmd_end_ipi(cmd);

#else

		end_cmd(cmd);
@@ -571,7 +571,7 @@ static int __init null_init(void) 
{

	unsigned int i;



#if !defined(CONFIG_SMP) || !defined(CONFIG_USE_GENERIC_SMP_HELPERS)

#if !defined(CONFIG_SMP)

	if (irqmode == NULL_IRQ_SOFTIRQ) {

		pr_warn("null_blk: softirq completions not available.\n");

		pr_warn("null_blk: using direct completions.\n");