The patch titled
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
has been removed from the -mm tree. Its filename was
xen-paravirt_ops-allocate-and-free-vmalloc-areas.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
Subject: From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Allocate/destroy a 'vmalloc' VM area: alloc_vm_area and free_vm_area
The alloc function ensures that page tables are constructed for the
region of kernel virtual address space and mapped into init_mm.
Signed-off-by: Ian Pratt <ian.pratt@xxxxxxxxxxxxx>
Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Cc: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Cc: "Andi Kleen" <ak@xxxxxx>
--
===================================================================
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/mm/fault.c | 43 ++++++++++++++++++++++++++++++++++++++
include/linux/vmalloc.h | 4 +++
2 files changed, 47 insertions(+)
diff -puN arch/i386/mm/fault.c~xen-paravirt_ops-allocate-and-free-vmalloc-areas arch/i386/mm/fault.c
--- a/arch/i386/mm/fault.c~xen-paravirt_ops-allocate-and-free-vmalloc-areas
+++ a/arch/i386/mm/fault.c
@@ -24,6 +24,7 @@
#include <linux/module.h>
#include <linux/kprobes.h>
#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
#include <asm/system.h>
#include <asm/desc.h>
@@ -639,3 +640,45 @@ void _vmalloc_sync_all(void)
start = address + PGDIR_SIZE;
}
}
+
+
+static int f(pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
+{
+ /* apply_to_page_range() does all the hard work. */
+ return 0;
+}
+
+struct vm_struct *alloc_vm_area(unsigned long size)
+{
+ struct vm_struct *area;
+
+ area = get_vm_area(size, VM_IOREMAP);
+ if (area == NULL)
+ return NULL;
+
+ /*
+ * This ensures that page tables are constructed for this region
+ * of kernel virtual address space and mapped into init_mm.
+ */
+ if (apply_to_page_range(&init_mm, (unsigned long)area->addr,
+ area->size, f, NULL)) {
+ free_vm_area(area);
+ return NULL;
+ }
+
+ /* Make sure the pagetables are constructed in process kernel
+ mappings */
+ vmalloc_sync_all();
+
+ return area;
+}
+EXPORT_SYMBOL_GPL(alloc_vm_area);
+
+void free_vm_area(struct vm_struct *area)
+{
+ struct vm_struct *ret;
+ ret = remove_vm_area(area->addr);
+ BUG_ON(ret != area);
+ kfree(area);
+}
+EXPORT_SYMBOL_GPL(free_vm_area);
diff -puN include/linux/vmalloc.h~xen-paravirt_ops-allocate-and-free-vmalloc-areas include/linux/vmalloc.h
--- a/include/linux/vmalloc.h~xen-paravirt_ops-allocate-and-free-vmalloc-areas
+++ a/include/linux/vmalloc.h
@@ -68,6 +68,10 @@ extern int map_vm_area(struct vm_struct
struct page ***pages);
extern void unmap_vm_area(struct vm_struct *area);
+/* Allocate/destroy a 'vmalloc' VM area. */
+extern struct vm_struct *alloc_vm_area(unsigned long size);
+extern void free_vm_area(struct vm_struct *area);
+
/*
* Internals. Dont't use..
*/
_
Patches currently in -mm which might be from jeremy@xxxxxxxx are
make-hvc_consolec-compile-on-non-powerpc-remove-no_irq.patch
xen-paravirt_ops-no-need-to-use-traditional-for-processing-asm-in-arch-i386.patch
xen-paravirt_ops-clean-up-elf-note-generation.patch
xen-paravirt_ops-fix-typo-in-sync_constant_test_bits-name.patch
xen-paravirt_ops-ignore-vgacon-if-hardware-not-present.patch
xen-paravirt_ops-paravirt_ops-hooks-to-set-up-initial-pagetable.patch
xen-paravirt_ops-paravirt_ops-allocate-a-fixmap-slot.patch
xen-paravirt_ops-allow-paravirt-backend-to-choose-kernel-pmd-sharing.patch
xen-paravirt_ops-remove-have_arch_mm_lifetime-define-no-op-architecture-implementations.patch
xen-paravirt_ops-allocate-and-free-vmalloc-areas.patch
xen-paravirt_ops-core-xen-implementation.patch
xen-paravirt_ops-some-generic-early-printk-boot-console-fixups.patch
xen-paravirt_ops-use-the-hvc-console-infrastructure-for-xen-console.patch
fixes-and-cleanups-for-earlyprintk-aka-boot-console.patch
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