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Commit 7a92cc6b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'akpm' (patches from Andrew) 

Merge fixes from Andrew Morton:
 "8 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm, fs: check for fatal signals in do_generic_file_read()
  fs: break out of iomap_file_buffered_write on fatal signals
  base/memory, hotplug: fix a kernel oops in show_valid_zones()
  mm/memory_hotplug.c: check start_pfn in test_pages_in_a_zone()
  jump label: pass kbuild_cflags when checking for asm goto support
  shmem: fix sleeping from atomic context
  kasan: respect /proc/sys/kernel/traceoff_on_warning
  zswap: disable changing params if init fails
parents 3f67790d 5abf186a

Makefile

+1 −1
Original line number Diff line number Diff line
@@ -797,7 +797,7 @@ KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) 
KBUILD_ARFLAGS := $(call ar-option,D)



# check for 'asm goto'

ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)

ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)

	KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO

	KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO

endif

drivers/base/memory.c

+6 −6
Original line number Diff line number Diff line
@@ -389,33 +389,33 @@ static ssize_t show_valid_zones(struct device *dev, 
{

	struct memory_block *mem = to_memory_block(dev);

	unsigned long start_pfn, end_pfn;

	unsigned long valid_start, valid_end, valid_pages;

	unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;

	struct page *first_page;

	struct zone *zone;

	int zone_shift = 0;



	start_pfn = section_nr_to_pfn(mem->start_section_nr);

	end_pfn = start_pfn + nr_pages;

	first_page = pfn_to_page(start_pfn);



	/* The block contains more than one zone can not be offlined. */

	if (!test_pages_in_a_zone(start_pfn, end_pfn))

	if (!test_pages_in_a_zone(start_pfn, end_pfn, &valid_start, &valid_end))

		return sprintf(buf, "none\n");



	zone = page_zone(first_page);

	zone = page_zone(pfn_to_page(valid_start));

	valid_pages = valid_end - valid_start;



	/* MMOP_ONLINE_KEEP */

	sprintf(buf, "%s", zone->name);



	/* MMOP_ONLINE_KERNEL */

	zone_can_shift(start_pfn, nr_pages, ZONE_NORMAL, &zone_shift);

	zone_can_shift(valid_start, valid_pages, ZONE_NORMAL, &zone_shift);

	if (zone_shift) {

		strcat(buf, " ");

		strcat(buf, (zone + zone_shift)->name);

	}



	/* MMOP_ONLINE_MOVABLE */

	zone_can_shift(start_pfn, nr_pages, ZONE_MOVABLE, &zone_shift);

	zone_can_shift(valid_start, valid_pages, ZONE_MOVABLE, &zone_shift);

	if (zone_shift) {

		strcat(buf, " ");

		strcat(buf, (zone + zone_shift)->name);

fs/dax.c

+5 −0
Original line number Diff line number Diff line
@@ -1031,6 +1031,11 @@ dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, 
		struct blk_dax_ctl dax = { 0 };

		ssize_t map_len;



		if (fatal_signal_pending(current)) {

			ret = -EINTR;

			break;

		}



		dax.sector = dax_iomap_sector(iomap, pos);

		dax.size = (length + offset + PAGE_SIZE - 1) & PAGE_MASK;

		map_len = dax_map_atomic(iomap->bdev, &dax);

fs/iomap.c

+3 −0
Original line number Diff line number Diff line
@@ -114,6 +114,9 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags, 


	BUG_ON(pos + len > iomap->offset + iomap->length);



	if (fatal_signal_pending(current))

		return -EINTR;



	page = grab_cache_page_write_begin(inode->i_mapping, index, flags);

	if (!page)

		return -ENOMEM;

include/linux/memory_hotplug.h

+2 −1
Original line number Diff line number Diff line
@@ -85,7 +85,8 @@ extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); 
extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);

/* VM interface that may be used by firmware interface */

extern int online_pages(unsigned long, unsigned long, int);

extern int test_pages_in_a_zone(unsigned long, unsigned long);

extern int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn,

	unsigned long *valid_start, unsigned long *valid_end);

extern void __offline_isolated_pages(unsigned long, unsigned long);



typedef void (*online_page_callback_t)(struct page *page);