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ARM: 7835/2: fix modular build of xor_blocks() with NEON enabled

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Commit 0195659 introduced a NEON accelerated version of the xor_blocks()
function, but it needs the changes in this patch to allow it to be built
as a module rather than statically into the kernel.

This patch creates a separate module xor-neon.ko which exports the NEON
inner xor_blocks() functions depended upon by the regular xor.ko if it
is built with CONFIG_KERNEL_MODE_NEON=y

Reported-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ard Biesheuvel 2013-09-09 15:08:38 +01:00 committed by Russell King
parent e5c832d555
commit 9319206d71
2 changed files with 5 additions and 1 deletions
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2
arch/arm/lib/Makefile
View File

@ -49,5 +49,5 @@ $(obj)/csumpartialcopyuser.o: $(obj)/csumpartialcopygeneric.S
ifeq ($(CONFIG_KERNEL_MODE_NEON),y)
NEON_FLAGS := -mfloat-abi=softfp -mfpu=neon
CFLAGS_xor-neon.o += $(NEON_FLAGS)
lib-$(CONFIG_XOR_BLOCKS) += xor-neon.o
obj-$(CONFIG_XOR_BLOCKS) += xor-neon.o
endif

4
arch/arm/lib/xor-neon.c
View File

@ -9,6 +9,9 @@
*/
#include <linux/raid/xor.h>
#include <linux/module.h>
MODULE_LICENSE("GPL");
#ifndef __ARM_NEON__
#error You should compile this file with '-mfloat-abi=softfp -mfpu=neon'
@ -40,3 +43,4 @@ struct xor_block_template const xor_block_neon_inner = {
.do_4 = xor_8regs_4,
.do_5 = xor_8regs_5,
};
EXPORT_SYMBOL(xor_block_neon_inner);