Commit 814f91bf authored by James Hogan's avatar James Hogan
Browse files

MIPS: Move pgd_alloc() out of header 



pgd_alloc() references init_mm which is not exported to modules. In
order for KVM to be able to use pgd_alloc() to allocate GVA page tables,
move pgd_alloc() into a new pgtable.c file and export it to modules.

Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Acked-by: default avatarRalf Baechle <ralf@linux-mips.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
parent 0c744ea4

arch/mips/include/asm/pgalloc.h

+1 −15
Original line number Diff line number Diff line
@@ -43,21 +43,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) 
 * Initialize a new pgd / pmd table with invalid pointers.

 */

extern void pgd_init(unsigned long page);



static inline pgd_t *pgd_alloc(struct mm_struct *mm)

{

	pgd_t *ret, *init;



	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);

	if (ret) {

		init = pgd_offset(&init_mm, 0UL);

		pgd_init((unsigned long)ret);

		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,

		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));

	}



	return ret;

}

extern pgd_t *pgd_alloc(struct mm_struct *mm);



static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)

{

arch/mips/mm/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 


obj-y				+= cache.o dma-default.o extable.o fault.o \

				   gup.o init.o mmap.o page.o page-funcs.o \

				   tlbex.o tlbex-fault.o tlb-funcs.o

				   pgtable.o tlbex.o tlbex-fault.o tlb-funcs.o



ifdef CONFIG_CPU_MICROMIPS

obj-y				+= uasm-micromips.o

arch/mips/mm/pgtable.c

0 → 100644
+25 −0
Original line number Diff line number Diff line 
/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 */

#include <linux/export.h>

#include <linux/mm.h>

#include <linux/string.h>

#include <asm/pgalloc.h>



pgd_t *pgd_alloc(struct mm_struct *mm)

{

	pgd_t *ret, *init;



	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);

	if (ret) {

		init = pgd_offset(&init_mm, 0UL);

		pgd_init((unsigned long)ret);

		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,

		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));

	}



	return ret;

}

EXPORT_SYMBOL_GPL(pgd_alloc);

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