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Subject[PATCH] move memory_read_from_buffer() from fs.h to string.h
On Fri, Jul 04, 2008 at 09:42:35AM -0500, James Bottomley wrote:
> For such a micro optimisation, this is a pretty big price to pay.
>
> Inclusion of linux/fs.h in a low level driver was always a danger signal
> usually it meant the driver was trying to access files or something at
> the very least it was a warning of a potential layering violation. Now
> you're trying to make it standard practice ... I really don't like that.
> Surely a function that does memory to memory copies belongs either in
> string.h with the rest of our memory copies ... or in another header
> that would be a usual include for the potential users.

OK, I'll move it to linux/string.h

From: Akinobu Mita <akinobu.mita@gmail.com>
Subject: [PATCH] move memory_read_from_buffer() from fs.h to string.h

James Bottomley warns that inclusion of linux/fs.h in a low level driver
was always a danger signal. This patch moves memory_read_from_buffer()
from fs.h to string.h and fixes includes in existing memory_read_from_buffer()
users.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Bob Moore <robert.moore@intel.com>
Cc: Thomas Renninger <trenn@suse.de>
Cc: Len Brown <lenb@kernel.org>
---
drivers/acpi/system.c | 1 +
drivers/zorro/zorro-sysfs.c | 1 -
include/linux/fs.h | 2 --
include/linux/string.h | 3 +++
4 files changed, 4 insertions(+), 3 deletions(-)

Index: 2.6-mm/include/linux/fs.h
===================================================================
--- 2.6-mm.orig/include/linux/fs.h
+++ 2.6-mm/include/linux/fs.h
@@ -2026,8 +2026,6 @@ extern void simple_release_fs(struct vfs

extern ssize_t simple_read_from_buffer(void __user *to, size_t count,
loff_t *ppos, const void *from, size_t available);
-extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
- const void *from, size_t available);

#ifdef CONFIG_MIGRATION
extern int buffer_migrate_page(struct address_space *,
Index: 2.6-mm/include/linux/string.h
===================================================================
--- 2.6-mm.orig/include/linux/string.h
+++ 2.6-mm/include/linux/string.h
@@ -111,5 +111,8 @@ extern void argv_free(char **argv);

extern bool sysfs_streq(const char *s1, const char *s2);

+extern ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
+ const void *from, size_t available);
+
#endif
#endif /* _LINUX_STRING_H_ */
Index: 2.6-mm/drivers/acpi/system.c
===================================================================
--- 2.6-mm.orig/drivers/acpi/system.c
+++ 2.6-mm/drivers/acpi/system.c
@@ -26,6 +26,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
+#include <linux/string.h>
#include <asm/uaccess.h>

#include <acpi/acpi_drivers.h>
Index: 2.6-mm/drivers/zorro/zorro-sysfs.c
===================================================================
--- 2.6-mm.orig/drivers/zorro/zorro-sysfs.c
+++ 2.6-mm/drivers/zorro/zorro-sysfs.c
@@ -15,7 +15,6 @@
#include <linux/zorro.h>
#include <linux/stat.h>
#include <linux/string.h>
-#include <linux/fs.h>

#include "zorro.h"


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