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: James Hogan <james.hogan@imgtec.com>
Acked-by: Ralf 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

diff --git a/arch/mips/include/asm/pgalloc.h b/arch/mips/include/asm/pgalloc.h
index a03e869..a8705f6 100644 (file)
--- a/arch/mips/include/asm/pgalloc.h
+++ b/arch/mips/include/asm/pgalloc.h
@@ -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)
 {

diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile
index b4c64bd..b4cc881 100644 (file)
--- a/arch/mips/mm/Makefile
+++ b/arch/mips/mm/Makefile
@@ -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

diff --git a/arch/mips/mm/pgtable.c b/arch/mips/mm/pgtable.c
new file mode 100644 (file)
index 0000000..05560b0
--- /dev/null
+++ b/arch/mips/mm/pgtable.c
@@ -0,0 +1,25 @@
+/*
+ * 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);