Re: [PATCH 2/3] 9pfs: Use g_new() & friends where that makes obvious sense

["Philippe Mathieu-Daudé" <philippe.mathieu.daude@gmail.com>]

Hi Christian,

On 14/3/22 17:42, Christian Schoenebeck wrote:
> On Montag, 14. März 2022 17:01:07 CET Markus Armbruster wrote:
>> g_new(T, n) is neater than g_malloc(sizeof(T) * n).  It's also safer,
>> for two reasons.  One, it catches multiplication overflowing size_t.
>> Two, it returns T * rather than void *, which lets the compiler catch
>> more type errors.
>>
>> This commit only touches allocations with size arguments of the form
>> sizeof(T).
>>
>> Patch created mechanically with:
>>
>>      $ spatch --in-place --sp-file scripts/coccinelle/use-g_new-etc.cocci \
>> 	     --macro-file scripts/cocci-macro-file.h FILES...
>>
>> Except this uncovers a typing error:
>>
>>      ../hw/9pfs/9p.c:855:13: warning: incompatible pointer types assigning to
>> 'QpfEntry *' from 'QppEntry *' [-Wincompatible-pointer-types] val =
>> g_new0(QppEntry, 1);
>> 		^ ~~~~~~~~~~~~~~~~~~~
>>      1 warning generated.
>>
>> Harmless, because QppEntry is larger than QpfEntry.  Fix to allocate a
>> QpfEntry instead.
>>
>> Cc: Greg Kurz <groug@kaod.org>
>> Cc: Christian Schoenebeck <qemu_oss@crudebyte.com>
>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>> ---
> 
> Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>

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