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Howlett" To: Wei Yang Cc: akpm@linux-foundation.org, maple-tree@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH 1/3] maple_tree: use ma_data_end() in mas_data_end() Message-ID: Mail-Followup-To: "Liam R. 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 XJThQY+N 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: * Wei Yang [240830 20:11]: > These two function share almost the same code and do the same thing. Please stop trying to optimise code like this. I don't have time to verify you are not making things worse and you haven't done any of the testing required. I went through with perf to optimise dereferences and static inline functions, so unless you are prepared to look at the generated code and actually benchmark, please stop sending patches that I need to verify like this myself. > > Let's just call ma_data_end() in mas_data_end() to reduce duplicate > code. > > Signed-off-by: Wei Yang > --- > lib/maple_tree.c | 22 ++++------------------ > 1 file changed, 4 insertions(+), 18 deletions(-) > > diff --git a/lib/maple_tree.c b/lib/maple_tree.c > index b7d747a7938e..85668246f944 100644 > --- a/lib/maple_tree.c > +++ b/lib/maple_tree.c > @@ -1435,28 +1435,14 @@ static __always_inline unsigned char ma_data_end(struct maple_node *node, > */ > static inline unsigned char mas_data_end(struct ma_state *mas) > { > - enum maple_type type; > - struct maple_node *node; > - unsigned char offset; > - unsigned long *pivots; > - > - type = mte_node_type(mas->node); > - node = mas_mn(mas); > - if (type == maple_arange_64) > - return ma_meta_end(node, type); > + enum maple_type type = mte_node_type(mas->node); > + struct maple_node *node = mas_mn(mas); > + unsigned long *pivots = ma_pivots(node, type); > > - pivots = ma_pivots(node, type); > if (unlikely(ma_dead_node(node))) > return 0; > > - offset = mt_pivots[type] - 1; > - if (likely(!pivots[offset])) > - return ma_meta_end(node, type); > - > - if (likely(pivots[offset] == mas->max)) > - return offset; > - > - return mt_pivots[type]; > + return ma_data_end(node, type, pivots, mas->max); > } > > /* > -- > 2.34.1 > >