[PATCH 1/8] x86: Make get_ramdisk_{image|size}() global.

Tang Chen
2013-08-21T10:19:52Z

From: Yinghai Lu <yinghai@kernel.org>

This patch does two things:

1. Make get_ramdisk_image() and get_ramdisk_size() global so that we can use
them in the later patches.

2. In later patches, we are going to call them in head_32.S before paging is
enabled. In that case, we can only use physical address to access global
variable like boot_params. So make them take a boot_params pointer parameter
so that we can pass va or pa to them.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Tested-by: Thomas Renninger <trenn@suse.de>
Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>
Tested-by: Tang Chen <tangchen@cn.fujitsu.com>
---
arch/x86/include/asm/setup.h | 3 +++
arch/x86/kernel/setup.c | 28 ++++++++++++++--------------
2 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
index b7bf350..4f71d48 100644
--- a/arch/x86/include/asm/setup.h
+++ b/arch/x86/include/asm/setup.h
@@ -106,6 +106,9 @@ void *extend_brk(size_t size, size_t align);
RESERVE_BRK(name, sizeof(type) * entries)

extern void probe_roms(void);
+u64 get_ramdisk_image(struct boot_params *bp);
+u64 get_ramdisk_size(struct boot_params *bp);
+
#ifdef __i386__

void __init i386_start_kernel(void);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f8ec578..5bfd4c8 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -297,19 +297,19 @@ static void __init reserve_brk(void)

#ifdef CONFIG_BLK_DEV_INITRD

-static u64 __init get_ramdisk_image(void)
+u64 __init get_ramdisk_image(struct boot_params *bp)
{
- u64 ramdisk_image = boot_params.hdr.ramdisk_image;
+ u64 ramdisk_image = bp->hdr.ramdisk_image;

- ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32;
+ ramdisk_image |= (u64)bp->ext_ramdisk_image << 32;

return ramdisk_image;
}
-static u64 __init get_ramdisk_size(void)
+u64 __init get_ramdisk_size(struct boot_params *bp)
{
- u64 ramdisk_size = boot_params.hdr.ramdisk_size;
+ u64 ramdisk_size = bp->hdr.ramdisk_size;

- ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32;
+ ramdisk_size |= (u64)bp->ext_ramdisk_size << 32;

return ramdisk_size;
}
@@ -318,8 +318,8 @@ static u64 __init get_ramdisk_size(void)
static void __init relocate_initrd(void)
{
/* Assume only end is not page aligned */
- u64 ramdisk_image = get_ramdisk_image();
- u64 ramdisk_size = get_ramdisk_size();
+ u64 ramdisk_image = get_ramdisk_image(&boot_params);
+ u64 ramdisk_size = get_ramdisk_size(&boot_params);
u64 area_size = PAGE_ALIGN(ramdisk_size);
u64 ramdisk_here;
unsigned long slop, clen, mapaddr;
@@ -358,8 +358,8 @@ static void __init relocate_initrd(void)
ramdisk_size -= clen;
}

- ramdisk_image = get_ramdisk_image();
- ramdisk_size = get_ramdisk_size();
+ ramdisk_image = get_ramdisk_image(&boot_params);
+ ramdisk_size = get_ramdisk_size(&boot_params);
printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to"
" [mem %#010llx-%#010llx]\n",
ramdisk_image, ramdisk_image + ramdisk_size - 1,
@@ -369,8 +369,8 @@ static void __init relocate_initrd(void)
static void __init early_reserve_initrd(void)
{
/* Assume only end is not page aligned */
- u64 ramdisk_image = get_ramdisk_image();
- u64 ramdisk_size = get_ramdisk_size();
+ u64 ramdisk_image = get_ramdisk_image(&boot_params);
+ u64 ramdisk_size = get_ramdisk_size(&boot_params);
u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);

if (!boot_params.hdr.type_of_loader ||
@@ -382,8 +382,8 @@ static void __init early_reserve_initrd(void)
static void __init reserve_initrd(void)
{
/* Assume only end is not page aligned */
- u64 ramdisk_image = get_ramdisk_image();
- u64 ramdisk_size = get_ramdisk_size();
+ u64 ramdisk_image = get_ramdisk_image(&boot_params);
+ u64 ramdisk_size = get_ramdisk_size(&boot_params);
u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size);
u64 mapped_size;

--
1.7.1