linux-kernel - [PATCH] vmalloc: Add __get_vm_area

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Message-Id: <20090211044854.969CEDDDA9@ozlabs.org>
Date:	Wed, 11 Feb 2009 15:48:26 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linux Memory Management <linux-mm@...ck.org>
CC:	<linuxppc-dev@...abs.org>, <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] vmalloc: Add __get_vm_area_caller()

We have get_vm_area_caller() and __get_vm_area() but not __get_vm_area_caller()

On powerpc, I use __get_vm_area() to separate the ranges of addresses given
to vmalloc vs. ioremap (various good reasons for that) so in order to be
able to implement the new caller tracking in /proc/vmallocinfo, I need
a "_caller" variant of it.

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

I want to put into powerpc-next patches relying into that, so if the
patch is ok with you guys, can I stick it in powerpc.git ?

 include/linux/vmalloc.h |    3 +++
 mm/vmalloc.c            |    8 ++++++++
 2 files changed, 11 insertions(+)

--- linux-work.orig/include/linux/vmalloc.h	2009-02-04 15:33:35.000000000 +1100
+++ linux-work/include/linux/vmalloc.h	2009-02-04 15:33:47.000000000 +1100
@@ -84,6 +84,9 @@ extern struct vm_struct *get_vm_area_cal
 					unsigned long flags, void *caller);
 extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
 					unsigned long start, unsigned long end);
+extern struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
+					      unsigned long start, unsigned long end,
+					      void *caller);
 extern struct vm_struct *get_vm_area_node(unsigned long size,
 					  unsigned long flags, int node,
 					  gfp_t gfp_mask);
Index: linux-work/mm/vmalloc.c
===================================================================
--- linux-work.orig/mm/vmalloc.c	2009-02-04 15:32:47.000000000 +1100
+++ linux-work/mm/vmalloc.c	2009-02-04 15:33:25.000000000 +1100
@@ -1106,6 +1106,14 @@ struct vm_struct *__get_vm_area(unsigned
 }
 EXPORT_SYMBOL_GPL(__get_vm_area);
 
+struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
+				       unsigned long start, unsigned long end,
+				       void *caller)
+{
+	return __get_vm_area_node(size, flags, start, end, -1, GFP_KERNEL,
+				  caller);
+}
+
 /**
  *	get_vm_area  -  reserve a contiguous kernel virtual area
  *	@size:		size of the area

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