| Message ID | 20230606223130.6132-3-dakr@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | DRM GPUVA Manager & Nouveau VM_BIND UAPI | expand |
* Danilo Krummrich <dakr@redhat.com> [230606 18:31]: > Split up the MA_STATE() macro such that components using the maple tree > can easily inherit from struct ma_state and build custom tree walk > macros to hide their internals from users. > > Example: > > struct sample_iterator { > struct ma_state mas; > struct sample_mgr *mgr; > }; > > \#define SAMPLE_ITERATOR(name, __mgr, start) \ > struct sample_iterator name = { \ > .mas = MA_STATE_INIT(&(__mgr)->mt, start, 0), \ > .mgr = __mgr, \ > } > > \#define sample_iter_for_each_range(it__, entry__, end__) \ > mas_for_each(&(it__).mas, entry__, end__) > > -- > > struct sample *sample; > SAMPLE_ITERATOR(si, min); > > sample_iter_for_each_range(&si, sample, max) { > frob(mgr, sample); > } > > Signed-off-by: Danilo Krummrich <dakr@redhat.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> > --- > include/linux/maple_tree.h | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h > index 1fadb5f5978b..87d55334f1c2 100644 > --- a/include/linux/maple_tree.h > +++ b/include/linux/maple_tree.h > @@ -423,8 +423,8 @@ struct ma_wr_state { > #define MA_ERROR(err) \ > ((struct maple_enode *)(((unsigned long)err << 2) | 2UL)) > > -#define MA_STATE(name, mt, first, end) \ > - struct ma_state name = { \ > +#define MA_STATE_INIT(mt, first, end) \ > + { \ > .tree = mt, \ > .index = first, \ > .last = end, \ > @@ -435,6 +435,9 @@ struct ma_wr_state { > .mas_flags = 0, \ > } > > +#define MA_STATE(name, mt, first, end) \ > + struct ma_state name = MA_STATE_INIT(mt, first, end) > + > #define MA_WR_STATE(name, ma_state, wr_entry) \ > struct ma_wr_state name = { \ > .mas = ma_state, \ > -- > 2.40.1 > >
diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h index 1fadb5f5978b..87d55334f1c2 100644 --- a/include/linux/maple_tree.h +++ b/include/linux/maple_tree.h @@ -423,8 +423,8 @@ struct ma_wr_state { #define MA_ERROR(err) \ ((struct maple_enode *)(((unsigned long)err << 2) | 2UL)) -#define MA_STATE(name, mt, first, end) \ - struct ma_state name = { \ +#define MA_STATE_INIT(mt, first, end) \ + { \ .tree = mt, \ .index = first, \ .last = end, \ @@ -435,6 +435,9 @@ struct ma_wr_state { .mas_flags = 0, \ } +#define MA_STATE(name, mt, first, end) \ + struct ma_state name = MA_STATE_INIT(mt, first, end) + #define MA_WR_STATE(name, ma_state, wr_entry) \ struct ma_wr_state name = { \ .mas = ma_state, \
Split up the MA_STATE() macro such that components using the maple tree can easily inherit from struct ma_state and build custom tree walk macros to hide their internals from users. Example: struct sample_iterator { struct ma_state mas; struct sample_mgr *mgr; }; \#define SAMPLE_ITERATOR(name, __mgr, start) \ struct sample_iterator name = { \ .mas = MA_STATE_INIT(&(__mgr)->mt, start, 0), \ .mgr = __mgr, \ } \#define sample_iter_for_each_range(it__, entry__, end__) \ mas_for_each(&(it__).mas, entry__, end__) -- struct sample *sample; SAMPLE_ITERATOR(si, min); sample_iter_for_each_range(&si, sample, max) { frob(mgr, sample); } Signed-off-by: Danilo Krummrich <dakr@redhat.com> --- include/linux/maple_tree.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)