LoongArch: Use unsigned long for _end and _text

[PATCH v1] LoongArch: Use unsigned long for _end and _text

Posted by Tiezhu Yang 6 days, 17 hours ago

It is better to use unsigned long rather than long for _end and _text
to calculate the kernel length.

Cc: stable@vger.kernel.org # v6.3+
Fixes: e5f02b51fa0c ("LoongArch: Add support for kernel address space layout randomization (KASLR)")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
 arch/loongarch/kernel/relocate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/loongarch/kernel/relocate.c b/arch/loongarch/kernel/relocate.c
index b5e2312a2fca..76abbb8d2931 100644
--- a/arch/loongarch/kernel/relocate.c
+++ b/arch/loongarch/kernel/relocate.c
@@ -183,7 +183,7 @@ static inline void __init *determine_relocation_address(void)
 	if (kaslr_disabled())
 		return destination;
 
-	kernel_length = (long)_end - (long)_text;
+	kernel_length = (unsigned long)_end - (unsigned long)_text;
 
 	random_offset = get_random_boot() << 16;
 	random_offset &= (CONFIG_RANDOMIZE_BASE_MAX_OFFSET - 1);
@@ -232,7 +232,7 @@ unsigned long __init relocate_kernel(void)
 	early_memunmap(cmdline, COMMAND_LINE_SIZE);
 
 	if (random_offset) {
-		kernel_length = (long)(_end) - (long)(_text);
+		kernel_length = (unsigned long)(_end) - (unsigned long)(_text);
 
 		/* Copy the kernel to it's new location */
 		memcpy(location_new, _text, kernel_length);
-- 
2.42.0

Re: [PATCH v1] LoongArch: Use unsigned long for _end and _text

Posted by Huacai Chen 4 days, 11 hours ago

Applied, thanks.

Huacai

On Tue, Nov 25, 2025 at 2:35 PM Tiezhu Yang <yangtiezhu@loongson.cn> wrote:
>
> It is better to use unsigned long rather than long for _end and _text
> to calculate the kernel length.
>
> Cc: stable@vger.kernel.org # v6.3+
> Fixes: e5f02b51fa0c ("LoongArch: Add support for kernel address space layout randomization (KASLR)")
> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
> ---
>  arch/loongarch/kernel/relocate.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/loongarch/kernel/relocate.c b/arch/loongarch/kernel/relocate.c
> index b5e2312a2fca..76abbb8d2931 100644
> --- a/arch/loongarch/kernel/relocate.c
> +++ b/arch/loongarch/kernel/relocate.c
> @@ -183,7 +183,7 @@ static inline void __init *determine_relocation_address(void)
>         if (kaslr_disabled())
>                 return destination;
>
> -       kernel_length = (long)_end - (long)_text;
> +       kernel_length = (unsigned long)_end - (unsigned long)_text;
>
>         random_offset = get_random_boot() << 16;
>         random_offset &= (CONFIG_RANDOMIZE_BASE_MAX_OFFSET - 1);
> @@ -232,7 +232,7 @@ unsigned long __init relocate_kernel(void)
>         early_memunmap(cmdline, COMMAND_LINE_SIZE);
>
>         if (random_offset) {
> -               kernel_length = (long)(_end) - (long)(_text);
> +               kernel_length = (unsigned long)(_end) - (unsigned long)(_text);
>
>                 /* Copy the kernel to it's new location */
>                 memcpy(location_new, _text, kernel_length);
> --
> 2.42.0
>
>