powerpc: Wire up /proc/vmallocinfo to our ioremap()

This adds the necessary bits and pieces to powerpc implementation of
ioremap to benefit from caller tracking in /proc/vmallocinfo, at least
for ioremap's done after mem init as the older ones aren't tracked.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 28 insertions, 11 deletions

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 58bcaeba728..0f8c4371dfa 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -129,7 +129,8 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 void __iomem *
 ioremap(phys_addr_t addr, unsigned long size)
 {
-	return __ioremap(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED);
+	return __ioremap_caller(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED,
+				__builtin_return_address(0));
 }
 EXPORT_SYMBOL(ioremap);
 
@@ -143,13 +144,20 @@ ioremap_flags(phys_addr_t addr, unsigned long size, unsigned long flags)
 	/* we don't want to let _PAGE_USER and _PAGE_EXEC leak out */
 	flags &= ~(_PAGE_USER | _PAGE_EXEC | _PAGE_HWEXEC);
 
-	return __ioremap(addr, size, flags);
+	return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
 }
 EXPORT_SYMBOL(ioremap_flags);
 
 void __iomem *
 __ioremap(phys_addr_t addr, unsigned long size, unsigned long flags)
 {
+	return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
+}
+
+void __iomem *
+__ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
+		 void *caller)
+{
 	unsigned long v, i;
 	phys_addr_t p;
 	int err;
@@ -212,7 +220,7 @@ __ioremap(phys_addr_t addr, unsigned long size, unsigned long flags)
 
 	if (mem_init_done) {
 		struct vm_struct *area;
-		area = get_vm_area(size, VM_IOREMAP);
+		area = get_vm_area_caller(size, VM_IOREMAP, caller);
 		if (area == 0)
 			return NULL;
 		v = (unsigned long) area->addr;
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 365e61ae5db..bfa7db6b2fd 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -144,8 +144,8 @@ void __iounmap_at(void *ea, unsigned long size)
 	unmap_kernel_range((unsigned long)ea, size);
 }
 
-void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
-			 unsigned long flags)
+void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
+				unsigned long flags, void *caller)
 {
 	phys_addr_t paligned;
 	void __iomem *ret;
@@ -168,8 +168,9 @@ void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
 	if (mem_init_done) {
 		struct vm_struct *area;
 
-		area = __get_vm_area(size, VM_IOREMAP,
-				     ioremap_bot, IOREMAP_END);
+		area = __get_vm_area_caller(size, VM_IOREMAP,
+					    ioremap_bot, IOREMAP_END,
+					    caller);
 		if (area == NULL)
 			return NULL;
 		ret = __ioremap_at(paligned, area->addr, size, flags);
@@ -186,19 +187,27 @@ void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
 	return ret;
 }
 
+void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
+			 unsigned long flags)
+{
+	return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
+}
 
 void __iomem * ioremap(phys_addr_t addr, unsigned long size)
 {
 	unsigned long flags = _PAGE_NO_CACHE | _PAGE_GUARDED;
+	void *caller = __builtin_return_address(0);
 
 	if (ppc_md.ioremap)
-		return ppc_md.ioremap(addr, size, flags);
-	return __ioremap(addr, size, flags);
+		return ppc_md.ioremap(addr, size, flags, caller);
+	return __ioremap_caller(addr, size, flags, caller);
 }
 
 void __iomem * ioremap_flags(phys_addr_t addr, unsigned long size,
 			     unsigned long flags)
 {
+	void *caller = __builtin_return_address(0);
+
 	/* writeable implies dirty for kernel addresses */
 	if (flags & _PAGE_RW)
 		flags |= _PAGE_DIRTY;
@@ -207,8 +216,8 @@ void __iomem * ioremap_flags(phys_addr_t addr, unsigned long size,
 	flags &= ~(_PAGE_USER | _PAGE_EXEC);
 
 	if (ppc_md.ioremap)
-		return ppc_md.ioremap(addr, size, flags);
-	return __ioremap(addr, size, flags);
+		return ppc_md.ioremap(addr, size, flags, caller);
+	return __ioremap_caller(addr, size, flags, caller);
 }