Commit 11e76514 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 

Pull sparc fixes from David Miller:
 "A couple small fixes for sparc including some THP brown-paper-bag
  material:

   1) During the merging of all the THP support for various
      architectures, sparc missed adding a
      HAVE_ARCH_TRANSPARENT_HUGEPAGE to it's Kconfig, oops.

   2) Sparc needs to be mindful of hugepages in get_user_pages_fast().

   3) Fix memory leak in SBUS probe, from Cong Ding.

   4) The sunvdc virtual disk client driver has a test of the bitmask of
      vdisk server supported operations which was off by one bit"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sunvdc: Fix off-by-one in generic_request().
  sparc64: Fix get_user_pages_fast() wrt. THP.
  sparc64: Add missing HAVE_ARCH_TRANSPARENT_HUGEPAGE.
  sparc: kernel/sbus.c: fix memory leakage
parents 5c0857a9 f4d96054

arch/sparc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ config SPARC64 
	select HAVE_MEMBLOCK

	select HAVE_MEMBLOCK_NODE_MAP

	select HAVE_SYSCALL_WRAPPERS

	select HAVE_ARCH_TRANSPARENT_HUGEPAGE

	select HAVE_DYNAMIC_FTRACE

	select HAVE_FTRACE_MCOUNT_RECORD

	select HAVE_SYSCALL_TRACEPOINTS

arch/sparc/include/asm/pgtable_64.h

+6 −8
Original line number Diff line number Diff line
@@ -71,7 +71,6 @@ 
#define PMD_PADDR	_AC(0xfffffffe,UL)

#define PMD_PADDR_SHIFT	_AC(11,UL)



#ifdef CONFIG_TRANSPARENT_HUGEPAGE

#define PMD_ISHUGE	_AC(0x00000001,UL)



/* This is the PMD layout when PMD_ISHUGE is set.  With 4MB huge
@@ -86,7 +85,6 @@ 
#define PMD_HUGE_ACCESSED	_AC(0x00000080,UL)

#define PMD_HUGE_EXEC		_AC(0x00000040,UL)

#define PMD_HUGE_SPLITTING	_AC(0x00000020,UL)

#endif



/* PGDs point to PMD tables which are 8K aligned.  */

#define PGD_PADDR	_AC(0xfffffffc,UL)
@@ -628,6 +626,12 @@ static inline unsigned long pte_special(pte_t pte) 
	return pte_val(pte) & _PAGE_SPECIAL;

}



static inline int pmd_large(pmd_t pmd)

{

	return (pmd_val(pmd) & (PMD_ISHUGE | PMD_HUGE_PRESENT)) ==

		(PMD_ISHUGE | PMD_HUGE_PRESENT);

}



#ifdef CONFIG_TRANSPARENT_HUGEPAGE

static inline int pmd_young(pmd_t pmd)

{
@@ -646,12 +650,6 @@ static inline unsigned long pmd_pfn(pmd_t pmd) 
	return val >> (PAGE_SHIFT - PMD_PADDR_SHIFT);

}



static inline int pmd_large(pmd_t pmd)

{

	return (pmd_val(pmd) & (PMD_ISHUGE | PMD_HUGE_PRESENT)) ==

		(PMD_ISHUGE | PMD_HUGE_PRESENT);

}



static inline int pmd_trans_splitting(pmd_t pmd)

{

	return (pmd_val(pmd) & (PMD_ISHUGE|PMD_HUGE_SPLITTING)) ==

arch/sparc/kernel/sbus.c

+3 −3
Original line number Diff line number Diff line
@@ -554,10 +554,8 @@ static void __init sbus_iommu_init(struct platform_device *op) 
	regs = pr->phys_addr;



	iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);

	if (!iommu)

		goto fatal_memory_error;

	strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);

	if (!strbuf)

	if (!iommu || !strbuf)

		goto fatal_memory_error;



	op->dev.archdata.iommu = iommu;
@@ -656,6 +654,8 @@ static void __init sbus_iommu_init(struct platform_device *op) 
	return;



fatal_memory_error:

	kfree(iommu);

	kfree(strbuf);

	prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");

}

arch/sparc/mm/gup.c

+57 −2
Original line number Diff line number Diff line
@@ -66,6 +66,56 @@ static noinline int gup_pte_range(pmd_t pmd, unsigned long addr, 
	return 1;

}



static int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr,

			unsigned long end, int write, struct page **pages,

			int *nr)

{

	struct page *head, *page, *tail;

	u32 mask;

	int refs;



	mask = PMD_HUGE_PRESENT;

	if (write)

		mask |= PMD_HUGE_WRITE;

	if ((pmd_val(pmd) & mask) != mask)

		return 0;



	refs = 0;

	head = pmd_page(pmd);

	page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);

	tail = page;

	do {

		VM_BUG_ON(compound_head(page) != head);

		pages[*nr] = page;

		(*nr)++;

		page++;

		refs++;

	} while (addr += PAGE_SIZE, addr != end);



	if (!page_cache_add_speculative(head, refs)) {

		*nr -= refs;

		return 0;

	}



	if (unlikely(pmd_val(pmd) != pmd_val(*pmdp))) {

		*nr -= refs;

		while (refs--)

			put_page(head);

		return 0;

	}



	/* Any tail page need their mapcount reference taken before we

	 * return.

	 */

	while (refs--) {

		if (PageTail(tail))

			get_huge_page_tail(tail);

		tail++;

	}



	return 1;

}



static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end,

		int write, struct page **pages, int *nr)

{
@@ -77,9 +127,14 @@ static int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, 
		pmd_t pmd = *pmdp;



		next = pmd_addr_end(addr, end);

		if (pmd_none(pmd))

		if (pmd_none(pmd) || pmd_trans_splitting(pmd))

			return 0;

		if (unlikely(pmd_large(pmd))) {

			if (!gup_huge_pmd(pmdp, pmd, addr, next,

					  write, pages, nr))

				return 0;

		if (!gup_pte_range(pmd, addr, next, write, pages, nr))

		} else if (!gup_pte_range(pmd, addr, next, write,

					  pages, nr))

			return 0;

	} while (pmdp++, addr = next, addr != end);

drivers/block/sunvdc.c

+1 −1
Original line number Diff line number Diff line
@@ -461,7 +461,7 @@ static int generic_request(struct vdc_port *port, u8 op, void *buf, int len) 
	int op_len, err;

	void *req_buf;



	if (!(((u64)1 << ((u64)op - 1)) & port->operations))

	if (!(((u64)1 << (u64)op) & port->operations))

		return -EOPNOTSUPP;



	switch (op) {

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