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authorJames Hogan <james.hogan@imgtec.com>2017-02-02 01:21:35 +0000
committerJames Hogan <james.hogan@imgtec.com>2017-02-02 15:06:26 +0000
commit814f91bf3ea0962e4f802324766bf301ef6f5431 (patch)
treeb2bfe4ee5f1d342a674cbe4abb77ee12deddae63 /arch/mips/mm/pgtable.c
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
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
Diffstat (limited to 'arch/mips/mm/pgtable.c')
-rw-r--r--arch/mips/mm/pgtable.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/mips/mm/pgtable.c b/arch/mips/mm/pgtable.c
new file mode 100644
index 000000000000..05560b042d82
--- /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);