[PATCH 1/2] kexec: align initrd when no --image-size passed

[Wang Nan]

Before this patch, when no --image-size passed, initrd_base is caculated using
base + len * 4, which is unaligned, and unable to pass check in
add_segment_phys_virt():

	if (base & (pagesize -1)) {
		die("Base address: 0x%lx is not page aligned\n", base);
	}

This patch also uses getpagesize() instead of hard encoded 4096.

Signed-off-by: Wang Nan <wangnan0 at huawei.com>
Cc: Simon Horman <horms at verge.net.au>
Cc: Dave Young <dyoung at redhat.com>
Cc: Geng Hui <hui.geng at huawei.com>
---
 kexec/arch/arm/kexec-zImage-arm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kexec/arch/arm/kexec-zImage-arm.c b/kexec/arch/arm/kexec-zImage-arm.c
index 792187a..8a35018 100644
--- a/kexec/arch/arm/kexec-zImage-arm.c
+++ b/kexec/arch/arm/kexec-zImage-arm.c
@@ -347,11 +347,11 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
 		/* If the image size was passed as command line argument,
 		 * use that value for determining the address for initrd,
 		 * atags and dtb images. page-align the given length.*/
-		initrd_base = base + _ALIGN(kexec_arm_image_size, 4096);
+		initrd_base = base + _ALIGN(kexec_arm_image_size, getpagesize());
 	} else {
 		/* Otherwise, assume the maximum kernel compression ratio
 		 * is 4, and just to be safe, place ramdisk after that */
-		initrd_base = base + len * 4;
+		initrd_base = base + _ALIGN(len * 4, getpagesize());
 	}
 
 	if (use_atags) {
-- 
1.8.4