Messages in this thread Patch in this message | | | From | Michael Ellerman <> | Subject | Re: [PATCH] powerpc/cell/axon_msi: replace DEFINE_SIMPLE_ATTRIBUTE with DEFINE_DEBUGFS_ATTRIBUTE | Date | Wed, 22 Dec 2021 11:08:38 +1100 |
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cgel.zte@gmail.com writes: > From: Changcheng Deng <deng.changcheng@zte.com.cn> > > Fix the following coccicheck warning: > ./arch/powerpc/platforms/cell/axon_msi.c: 456: 0-23: WARNING: fops_msic > should be defined with DEFINE_DEBUGFS_ATTRIBUTE > > Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE for > debugfs files.
But it also says:
//# Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file() //# imposes some significant overhead as compared to //# DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().
Your patch doesn't change it to use debugfs_create_file_unsafe(), shouldn't it?
cheers
> diff --git a/arch/powerpc/platforms/cell/axon_msi.c b/arch/powerpc/platforms/cell/axon_msi.c > index 354a58c1e6f2..47bb0ae8d6c9 100644 > --- a/arch/powerpc/platforms/cell/axon_msi.c > +++ b/arch/powerpc/platforms/cell/axon_msi.c > @@ -453,7 +453,7 @@ static int msic_get(void *data, u64 *val) > return 0; > } > > -DEFINE_SIMPLE_ATTRIBUTE(fops_msic, msic_get, msic_set, "%llu\n"); > +DEFINE_DEBUGFS_ATTRIBUTE(fops_msic, msic_get, msic_set, "%llu\n"); > > void axon_msi_debug_setup(struct device_node *dn, struct axon_msic *msic) > { > -- > 2.25.1
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