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x86/kexec: simplify the logic of mem_region_callback()

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The expression `mstart + resource_size(res) - 1` is actually equivalent to
`res->end`, simplify the logic of this function to improve readability.

Link: https://lkml.kernel.org/r/20231212150506.31711-1-ytcoode@gmail.com
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Simon Horman <horms@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Yuntao Wang 2023-12-12 23:05:06 +08:00 committed by Andrew Morton
parent db6b6fb701
commit 8474f82ade
1 changed files with 2 additions and 5 deletions
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7
arch/x86/kernel/machine_kexec_64.c
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@ -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