* [PATCH] x86/kexec: Simplify the logic of mem_region_callback()
@ 2023-12-12 15:05 Yuntao Wang
2023-12-13 2:47 ` Baoquan He
0 siblings, 1 reply; 2+ messages in thread
From: Yuntao Wang @ 2023-12-12 15:05 UTC (permalink / raw)
To: linux-kernel, x86
Cc: Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen,
H. Peter Anvin, Baoquan He, Bjorn Helgaas, Simon Horman,
Andrew Morton, Yuntao Wang
The expression `mstart + resource_size(res) - 1` is actually equivalent to
`res->end`, simplify the logic of this function to improve readability.
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
---
arch/x86/kernel/machine_kexec_64.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 1a3e2c05a8a5..6f8df998890e 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -42,12 +42,9 @@ struct init_pgtable_data {
static int mem_region_callback(struct resource *res, void *arg)
{
struct init_pgtable_data *data = arg;
- unsigned long mstart, mend;
-
- mstart = res->start;
- mend = mstart + resource_size(res) - 1;
- return kernel_ident_mapping_init(data->info, data->level4p, mstart, mend);
+ return kernel_ident_mapping_init(data->info, data->level4p,
+ res->start, res->end);
}
static int
--
2.43.0
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] x86/kexec: Simplify the logic of mem_region_callback()
2023-12-12 15:05 [PATCH] x86/kexec: Simplify the logic of mem_region_callback() Yuntao Wang
@ 2023-12-13 2:47 ` Baoquan He
0 siblings, 0 replies; 2+ messages in thread
From: Baoquan He @ 2023-12-13 2:47 UTC (permalink / raw)
To: Yuntao Wang
Cc: linux-kernel, x86, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
Dave Hansen, H. Peter Anvin, Bjorn Helgaas, Simon Horman,
Andrew Morton
On 12/12/23 at 11:05pm, Yuntao Wang wrote:
> The expression `mstart + resource_size(res) - 1` is actually equivalent to
> `res->end`, simplify the logic of this function to improve readability.
>
> Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
> ---
> arch/x86/kernel/machine_kexec_64.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
LGTM,
Acked-by: Baoquan He <bhe@redhat.com>
>
> diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
> index 1a3e2c05a8a5..6f8df998890e 100644
> --- a/arch/x86/kernel/machine_kexec_64.c
> +++ b/arch/x86/kernel/machine_kexec_64.c
> @@ -42,12 +42,9 @@ struct init_pgtable_data {
> static int mem_region_callback(struct resource *res, void *arg)
> {
> struct init_pgtable_data *data = arg;
> - unsigned long mstart, mend;
> -
> - mstart = res->start;
> - mend = mstart + resource_size(res) - 1;
>
> - return kernel_ident_mapping_init(data->info, data->level4p, mstart, mend);
> + return kernel_ident_mapping_init(data->info, data->level4p,
> + res->start, res->end);
> }
>
> static int
> --
> 2.43.0
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-12-12 15:05 [PATCH] x86/kexec: Simplify the logic of mem_region_callback() Yuntao Wang
2023-12-13 2:47 ` Baoquan He
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