linux-kernel - [PATCH] Export tiny shmem_file

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Message-ID: <Pine.LNX.4.64.0810202355590.11071@blonde.site>
Date:	Tue, 21 Oct 2008 00:04:04 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Airlie <airlied@...hat.com>,
	Keith Packard <keithp@...thp.com>,
	Eric Anholt <eric@...olt.net>, Nick Piggin <npiggin@...e.de>,
	Matt Mackall <mpm@...enic.com>,
	David Howells <dhowells@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Export tiny shmem_file_setup for DRM-GEM

We're trying to keep the !CONFIG_SHMEM tiny-shmem.c (using ramfs without
swap) in synch with CONFIG_SHMEM shmem.c (and mpm is preparing patches
to combine them).  I was glad to see EXPORT_SYMBOL_GPL(shmem_file_setup)
go into shmem.c, but why not support DRM-GEM when !CONFIG_SHMEM too?
But caution says still depend on MMU, since !CONFIG_MMU is.. different.

Signed-off-by: Hugh Dickins <hugh@...itas.com>
Acked-by: Matt Mackall <mpm@...enic.com>
Acked-by: Dave Airlie <airlied@...hat.com>
---

 drivers/gpu/drm/Kconfig |    2 +-
 mm/tiny-shmem.c         |    1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -6,7 +6,7 @@
 #
 menuconfig DRM
 	tristate "Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)"
-	depends on (AGP || AGP=n) && PCI && !EMULATED_CMPXCHG && SHMEM
+	depends on (AGP || AGP=n) && PCI && !EMULATED_CMPXCHG && MMU
 	help
 	  Kernel-level support for the Direct Rendering Infrastructure (DRI)
 	  introduced in XFree86 4.0. If you say Y here, you need to select
--- a/mm/tiny-shmem.c
+++ b/mm/tiny-shmem.c
@@ -95,6 +95,7 @@ put_dentry:
 put_memory:
 	return ERR_PTR(error);
 }
+EXPORT_SYMBOL_GPL(shmem_file_setup);
 
 /**
  * shmem_zero_setup - setup a shared anonymous mapping
--
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