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authorAnton Blanchard <anton@samba.org>2011-11-02 14:56:12 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-11-08 14:51:46 +1100
commitc40dd2f76644016ca7677545fc846ec2470d70a1 (patch)
tree0437aff6ea8cc7656c79f8c5391ca1b31a9ca403 /arch/powerpc/mm/mem.c
parent88cf11b4cca8ee0044d0a10ce100d8c0012b2c5e (diff)
powerpc: Add System RAM to /proc/iomem
We've resisted adding System RAM to /proc/iomem because it is the wrong place for it. Unfortunately we continue to find tools that rely on this behaviour so give up and add it in. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/mem.c')
-rw-r--r--arch/powerpc/mm/mem.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 16da595ff40..2dd6bdd31fe 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -34,6 +34,7 @@
#include <linux/suspend.h>
#include <linux/memblock.h>
#include <linux/hugetlb.h>
+#include <linux/slab.h>
#include <asm/pgalloc.h>
#include <asm/prom.h>
@@ -555,3 +556,32 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
book3e_hugetlb_preload(vma->vm_mm, address, *ptep);
#endif
}
+
+/*
+ * System memory should not be in /proc/iomem but various tools expect it
+ * (eg kdump).
+ */
+static int add_system_ram_resources(void)
+{
+ struct memblock_region *reg;
+
+ for_each_memblock(memory, reg) {
+ struct resource *res;
+ unsigned long base = reg->base;
+ unsigned long size = reg->size;
+
+ res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+ WARN_ON(!res);
+
+ if (res) {
+ res->name = "System RAM";
+ res->start = base;
+ res->end = base + size - 1;
+ res->flags = IORESOURCE_MEM;
+ WARN_ON(request_resource(&iomem_resource, res) < 0);
+ }
+ }
+
+ return 0;
+}
+subsys_initcall(add_system_ram_resources);