Hari Bathini <hbathini at linux.vnet.ibm.com> writes:
> Hi Dave,
>
>
> Thanks for the review.
>
>
> On Thursday 01 December 2016 10:26 AM, Dave Young wrote:
>> Hi Hari
>>
>> Personally I like V1 more, but split the patch 2 is easier for ia64
>> people to reivew. I did basic x86 testing, it runs ok.
>>
>> On 11/25/16 at 05:24pm, Hari Bathini wrote:
>>> Get rid of multiple definitions of append_elf_note() & final_note()
>>> functions. Reuse these functions compiled under CONFIG_CRASH_CORE.
>>>
>>> Signed-off-by: Hari Bathini <hbathini at linux.vnet.ibm.com>
>>> ---
>>> arch/ia64/kernel/crash.c | 22 ----------------------
>>> include/linux/crash_core.h | 4 ++++
>>> kernel/crash_core.c | 6 +++---
>>> kernel/kexec_core.c | 28 ----------------------------
>>> 4 files changed, 7 insertions(+), 53 deletions(-)
>>>
>>> diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
>>> index 2955f35..75859a0 100644
>>> --- a/arch/ia64/kernel/crash.c
>>> +++ b/arch/ia64/kernel/crash.c
>>> @@ -27,28 +27,6 @@ static int kdump_freeze_monarch;
>>> static int kdump_on_init = 1;
>>> static int kdump_on_fatal_mca = 1;
>>> -static inline Elf64_Word
>>> -*append_elf_note(Elf64_Word *buf, char *name, unsigned type, void *data,
>>> - size_t data_len)
>>> -{
>>> - struct elf_note *note = (struct elf_note *)buf;
>>> - note->n_namesz = strlen(name) + 1;
>>> - note->n_descsz = data_len;
>>> - note->n_type = type;
>>> - buf += (sizeof(*note) + 3)/4;
>>> - memcpy(buf, name, note->n_namesz);
>>> - buf += (note->n_namesz + 3)/4;
>>> - memcpy(buf, data, data_len);
>>> - buf += (data_len + 3)/4;
>>> - return buf;
>>> -}
>>> -
>>> -static void
>>> -final_note(void *buf)
>>> -{
>>> - memset(buf, 0, sizeof(struct elf_note));
>>> -}
>>> -
>> The above IA64 version looks better than the functions in kexec_core.c
>> about the Elf64_Word type usage and the simpler final_note function.
>
> Hmmm.. Is void* better over Elf64_Word* to be agnostic of Elf32 or
> Elf64 type?
Both Elf64_Word and Elf32_Word result in a u32. So I expect the right
solution is to add a definition of Elf_Word to include/linux/elf.h
and to make the buffer "Elf_Word *buf".
That way we preserve the alignment knowledge, while making the code
depend on 32bit or 64bit.
Eric
