Messages in this thread | | | Date | Wed, 18 May 2022 15:55:00 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH -next] x86/events:Use struct_size() helper in kzalloc() |
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On Wed, May 18, 2022 at 08:49:20AM -0500, Gustavo A. R. Silva wrote:
> > Signed-off-by: Lin Yujun <linyujun809@huawei.com> > > --- > > arch/x86/events/rapl.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c > > index 77e3a47af5ad..c7e79f0ac04f 100644 > > --- a/arch/x86/events/rapl.c > > +++ b/arch/x86/events/rapl.c > > @@ -685,7 +685,7 @@ static int __init init_rapl_pmus(void) > > int maxdie = topology_max_packages() * topology_max_die_per_package(); > > size_t size; > > > > - size = sizeof(*rapl_pmus) + maxdie * sizeof(struct rapl_pmu *); > > + size = struct_size(rapl_pmus, pmus, maxdie); > > rapl_pmus = kzalloc(size, GFP_KERNEL); > > It seems that in this case, size could be entirely replaced by > struct_size().
Except every time I look at struct_size() I go: WTF does that do; while the code as-is is crystal clear, no de-obfucstaion required.
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