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Commit 114e3bae authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm 

Pull ARM fixes from Russell King:
 "Only three fixes this time:

   - Emil found an overflow problem with the memory layout sanity check.

   - Ard Biesheuvel noticed that late-allocated page tables (for EFI)
     weren't being properly constructed.

   - Guenter Roeck reported a problem found on qemu caused by the recent
     addr_limit changes"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: fix address limit restoration for undefined instructions
  ARM: 8591/1: mm: use fully constructed struct pages for EFI pgd allocations
  ARM: 8590/1: sanity_check_meminfo(): avoid overflow on vmalloc_limit
parents 395c4342 87eed3c7

arch/arm/kernel/entry-armv.S

+1 −0
Original line number Diff line number Diff line
@@ -295,6 +295,7 @@ __und_svc_fault: 
	bl	__und_fault



__und_svc_finish:

	get_thread_info tsk

	ldr	r5, [sp, #S_PSR]		@ Get SVC cpsr

	svc_exit r5				@ return from exception

 UNWIND(.fnend		)

arch/arm/mm/mmu.c

+16 −5
Original line number Diff line number Diff line
@@ -728,7 +728,8 @@ static void *__init late_alloc(unsigned long sz) 
{

	void *ptr = (void *)__get_free_pages(PGALLOC_GFP, get_order(sz));



	BUG_ON(!ptr);

	if (!ptr || !pgtable_page_ctor(virt_to_page(ptr)))

		BUG();

	return ptr;

}
@@ -1155,10 +1156,19 @@ void __init sanity_check_meminfo(void) 
{

	phys_addr_t memblock_limit = 0;

	int highmem = 0;

	phys_addr_t vmalloc_limit = __pa(vmalloc_min - 1) + 1;

	u64 vmalloc_limit;

	struct memblock_region *reg;

	bool should_use_highmem = false;



	/*

	 * Let's use our own (unoptimized) equivalent of __pa() that is

	 * not affected by wrap-arounds when sizeof(phys_addr_t) == 4.

	 * The result is used as the upper bound on physical memory address

	 * and may itself be outside the valid range for which phys_addr_t

	 * and therefore __pa() is defined.

	 */

	vmalloc_limit = (u64)(uintptr_t)vmalloc_min - PAGE_OFFSET + PHYS_OFFSET;



	for_each_memblock(memory, reg) {

		phys_addr_t block_start = reg->base;

		phys_addr_t block_end = reg->base + reg->size;
@@ -1183,10 +1193,11 @@ void __init sanity_check_meminfo(void) 
			if (reg->size > size_limit) {

				phys_addr_t overlap_size = reg->size - size_limit;



				pr_notice("Truncating RAM at %pa-%pa to -%pa",

					  &block_start, &block_end, &vmalloc_limit);

				memblock_remove(vmalloc_limit, overlap_size);

				pr_notice("Truncating RAM at %pa-%pa",

					  &block_start, &block_end);

				block_end = vmalloc_limit;

				pr_cont(" to -%pa", &block_end);

				memblock_remove(vmalloc_limit, overlap_size);

				should_use_highmem = true;

			}

		}