Re: [PATCH] kexec_file: remove unused arch_kexec_locate_mem_hole hook

On 28/08/26 07:40, Baoquan He wrote:
> On 08/27/26 at 08:14pm, Sourabh Jain wrote:
>> No architecture provides an implementation of
>> arch_kexec_locate_mem_hole(). Use kexec_locate_mem_hole() directly
>> and remove the unused fallback wrapper from the kexec header.
> Since below commit, the last user was gone:
> commit 6e5250eaa665f ("powerpc/crash: use generic APIs to locate memory hole for kdump")
>
> Acked-by: Baoquan He <[email protected]>

Thanks for the Ack, Baoquan.

- Sourabh Jain

>
>> This simplifies the kexec memory allocation path without changing
>> its behavior.
>>
>> Cc: Albert Ou <[email protected]>
>> Cc: Andrew Morton <[email protected]>
>> Cc: Baoquan He <[email protected]>
>> Cc: Mike Rapoport <[email protected]>
>> Cc: Palmer Dabbelt <[email protected]>
>> Cc: Pasha Tatashin <[email protected]>
>> Cc: Paul Walmsley <[email protected]>
>> Cc: Pratyush Yadav <[email protected]>
>> Cc: [email protected]
>> Cc: [email protected]
>> Signed-off-by: Sourabh Jain <[email protected]>
>> ---
>>   arch/riscv/kernel/kexec_elf.c |  2 +-
>>   include/linux/kexec.h         | 15 ---------------
>>   kernel/kexec_file.c           |  2 +-
>>   3 files changed, 2 insertions(+), 17 deletions(-)
>>
>> diff --git a/arch/riscv/kernel/kexec_elf.c b/arch/riscv/kernel/kexec_elf.c
>> index 3e9a32acb8f2..ca5abbad59e5 100644
>> --- a/arch/riscv/kernel/kexec_elf.c
>> +++ b/arch/riscv/kernel/kexec_elf.c
>> @@ -91,7 +91,7 @@ static int elf_find_pbase(struct kimage *image, unsigned long kernel_len,
>>   	kbuf.memsz = ALIGN(kernel_len, PAGE_SIZE);
>>   	kbuf.cma = NULL;
>>   	kbuf.top_down = false;
>> -	ret = arch_kexec_locate_mem_hole(&kbuf);
>> +	ret = kexec_locate_mem_hole(&kbuf);
>>   	if (!ret) {
>>   		*old_pbase = lowest_paddr;
>>   		*new_pbase = kbuf.mem;
>> diff --git a/include/linux/kexec.h b/include/linux/kexec.h
>> index 0af8ae4fdd08..e5f1cfc11fef 100644
>> --- a/include/linux/kexec.h
>> +++ b/include/linux/kexec.h
>> @@ -259,21 +259,6 @@ int kexec_kernel_verify_pe_sig(const char *kernel, unsigned long kernel_len);
>>   extern int kexec_add_buffer(struct kexec_buf *kbuf);
>>   int kexec_locate_mem_hole(struct kexec_buf *kbuf);
>>   
>> -#ifndef arch_kexec_locate_mem_hole
>> -/**
>> - * arch_kexec_locate_mem_hole - Find free memory to place the segments.
>> - * @kbuf:                       Parameters for the memory search.
>> - *
>> - * On success, kbuf->mem will have the start address of the memory region found.
>> - *
>> - * Return: 0 on success, negative errno on error.
>> - */
>> -static inline int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf)
>> -{
>> -	return kexec_locate_mem_hole(kbuf);
>> -}
>> -#endif
>> -
>>   #ifndef arch_kexec_apply_relocations_add
>>   /*
>>    * arch_kexec_apply_relocations_add - apply relocations of type RELA
>> diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
>> index 59fb9d71e9d8..9a981359addd 100644
>> --- a/kernel/kexec_file.c
>> +++ b/kernel/kexec_file.c
>> @@ -784,7 +784,7 @@ int kexec_add_buffer(struct kexec_buf *kbuf)
>>   	kbuf->cma = NULL;
>>   
>>   	/* Walk the RAM ranges and allocate a suitable range for the buffer */
>> -	ret = arch_kexec_locate_mem_hole(kbuf);
>> +	ret = kexec_locate_mem_hole(kbuf);
>>   	if (ret)
>>   		return ret;
>>   
>> -- 
>> 2.55.0
>>


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