The patch titled
introduce memory_read_from_buffer()
has been removed from the -mm tree. Its filename was
introduce-memory_read_from_buffer.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: introduce memory_read_from_buffer()
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
This patch introduces memory_read_from_buffer().
The only difference between memory_read_from_buffer() and
simple_read_from_buffer() is which address space the function copies to.
simple_read_from_buffer copies to user space memory.
memory_read_from_buffer copies to normal memory.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Doug Warzecha <Douglas_Warzecha@xxxxxxxx>
Cc: Zhang Rui <rui.zhang@xxxxxxxxx>
Cc: Matt Domsch <Matt_Domsch@xxxxxxxx>
Cc: Abhay Salunke <Abhay_Salunke@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxx>
Cc: Markus Rechberger <markus.rechberger@xxxxxxx>
Cc: Kay Sievers <kay.sievers@xxxxxxxx>
Cc: Bob Moore <robert.moore@xxxxxxxxx>
Cc: Thomas Renninger <trenn@xxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: "Antonino A. Daplas" <adaplas@xxxxxxx>
Cc: Krzysztof Helt <krzysztof.h1@xxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Peter Oberparleiter <peter.oberparleiter@xxxxxxxxxx>
Cc: Michael Holzheu <holzheu@xxxxxxxxxx>
Cc: Brian King <brking@xxxxxxxxxx>
Cc: James E.J. Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Cc: Andrew Vasquez <linux-driver@xxxxxxxxxx>
Cc: Seokmann Ju <seokmann.ju@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/libfs.c | 18 ++++++++++++++++++
include/linux/fs.h | 5 ++++-
2 files changed, 22 insertions(+), 1 deletion(-)
diff -puN fs/libfs.c~introduce-memory_read_from_buffer fs/libfs.c
--- a/fs/libfs.c~introduce-memory_read_from_buffer
+++ a/fs/libfs.c
@@ -528,6 +528,23 @@ ssize_t simple_read_from_buffer(void __u
return count;
}
+ssize_t memory_read_from_buffer(void *to, size_t count, loff_t *ppos,
+ const void *from, size_t available)
+{
+ loff_t pos = *ppos;
+
+ if (pos < 0)
+ return -EINVAL;
+ if (pos >= available)
+ return 0;
+ if (count > available - pos)
+ count = available - pos;
+ memcpy(to, from + pos, count);
+ *ppos = pos + count;
+
+ return count;
+}
+
/*
* Transaction based IO.
* The file expects a single write which triggers the transaction, and then
@@ -800,6 +817,7 @@ EXPORT_SYMBOL(simple_statfs);
EXPORT_SYMBOL(simple_sync_file);
EXPORT_SYMBOL(simple_unlink);
EXPORT_SYMBOL(simple_read_from_buffer);
+EXPORT_SYMBOL(memory_read_from_buffer);
EXPORT_SYMBOL(simple_transaction_get);
EXPORT_SYMBOL(simple_transaction_read);
EXPORT_SYMBOL(simple_transaction_release);
diff -puN include/linux/fs.h~introduce-memory_read_from_buffer include/linux/fs.h
--- a/include/linux/fs.h~introduce-memory_read_from_buffer
+++ a/include/linux/fs.h
@@ -2000,7 +2000,10 @@ extern int simple_fill_super(struct supe
extern int simple_pin_fs(struct file_system_type *, struct vfsmount **mount, int *count);
extern void simple_release_fs(struct vfsmount **mount, int *count);
-extern ssize_t simple_read_from_buffer(void __user *, size_t, loff_t *, const void *, size_t);
+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 *,
_
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
origin.patch
acpi-use-memory_read_from_buffer.patch
ttusb-use-simple_read_from_buffer.patch
bluetooth-hci_bcspc-small-cleanups-api-users.patch
bluetooth-hci_bcspc-small-cleanups-api-users-fix.patch
isdn-use-simple_read_from_buffer.patch
ocfs2-use-simple_read_from_buffer.patch
s390-vmcp-use-simple_read_from_buffer.patch
s390-use-simple_read_from_buffer.patch
s390-cio-use-memory_read_from_buffer.patch
s390-use-memory_read_from_buffer.patch
ipr-use-memory_read_from_buffer.patch
qla2xxx-use-memory_read_from_buffer.patch
usbmon-use-simple_read_from_buffer.patch
airo-use-simple_read_from_buffer.patch
cris-use-simple_read_from_buffer.patch
binfmt_misc-use-simple_read_from_buffer.patch
aty-use-memory_read_from_buffer.patch
ipc-use-simple_read_from_buffer.patch
zorro-use-memory_read_from_buffer.patch
nwflash-use-simple_read_from_buffer.patch
firmware-use-memory_read_from_buffer.patch
dcdbas-use-memory_read_from_buffer.patch
dell_rbu-use-memory_read_from_buffer.patch
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