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Subject[PATCH 3/4] deinline dma_map_single_attrs()
Date
Reduces kernel size by 43259 bytes on allyesconfig build:

text data bss dec hex filename
82517277 22255384 20627456 125400117 7797435 vmlinux2
82474018 22255384 20627456 125356858 778cb3a vmlinux3

I did not find a suitable .c file to move this function to,
so I added a new one, kernel/dma-mapping-common.c

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: linux-kernel@vger.kernel.org
---
include/asm-generic/dma-mapping-common.h | 22 ++++-----------------
kernel/Makefile | 3 ++-
kernel/dma-mapping-common.c | 33 ++++++++++++++++++++++++++++++++
3 files changed, 39 insertions(+), 19 deletions(-)
create mode 100644 kernel/dma-mapping-common.c

diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h
index 3378dcf..688f86b 100644
--- a/include/asm-generic/dma-mapping-common.h
+++ b/include/asm-generic/dma-mapping-common.h
@@ -7,24 +7,10 @@
#include <linux/dma-debug.h>
#include <linux/dma-attrs.h>

-static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
- size_t size,
- enum dma_data_direction dir,
- struct dma_attrs *attrs)
-{
- struct dma_map_ops *ops = get_dma_ops(dev);
- dma_addr_t addr;
-
- kmemcheck_mark_initialized(ptr, size);
- BUG_ON(!valid_dma_direction(dir));
- addr = ops->map_page(dev, virt_to_page(ptr),
- (unsigned long)ptr & ~PAGE_MASK, size,
- dir, attrs);
- debug_dma_map_page(dev, virt_to_page(ptr),
- (unsigned long)ptr & ~PAGE_MASK, size,
- dir, addr, true);
- return addr;
-}
+dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
+ size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs);

static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
size_t size,
diff --git a/kernel/Makefile b/kernel/Makefile
index 1408b33..8c8b683 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -9,7 +9,8 @@ obj-y = fork.o exec_domain.o panic.o \
extable.o params.o \
kthread.o sys_ni.o nsproxy.o \
notifier.o ksysfs.o cred.o reboot.o \
- async.o range.o groups.o smpboot.o
+ async.o range.o groups.o smpboot.o \
+ dma-mapping-common.o

ifdef CONFIG_FUNCTION_TRACER
# Do not trace debug files and internal ftrace files
diff --git a/kernel/dma-mapping-common.c b/kernel/dma-mapping-common.c
new file mode 100644
index 0000000..17457a4
--- /dev/null
+++ b/kernel/dma-mapping-common.c
@@ -0,0 +1,33 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ */
+#include <linux/dma-mapping.h>
+#include <asm-generic/dma-mapping-common.h>
+
+dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
+ size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ dma_addr_t addr;
+
+ kmemcheck_mark_initialized(ptr, size);
+ BUG_ON(!valid_dma_direction(dir));
+ addr = ops->map_page(dev, virt_to_page(ptr),
+ (unsigned long)ptr & ~PAGE_MASK, size,
+ dir, attrs);
+ debug_dma_map_page(dev, virt_to_page(ptr),
+ (unsigned long)ptr & ~PAGE_MASK, size,
+ dir, addr, true);
+ return addr;
+}
+EXPORT_SYMBOL(dma_map_single_attrs);
--
1.8.1.4


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