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Subject[PATCH] x86/kexec: Simplify the logic of mem_region_callback()
Date
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
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