From: Yury Norov <yury.norov@gmail.com>
To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Brian Cain <bcain@codeaurora.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Jonas Bonn <jonas@southpole.se>,
Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
"James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Heiko Carstens <hca@linux.ibm.com>, Rich Felker <dalias@libc.org>,
David Hildenbrand <david@redhat.com>,
Jaegeuk Kim <jaegeuk@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Andrew Morton <akpm@linux-foundation.org>,
Alexander Lobakin <alobakin@pm.me>,
Samuel Mendoza-Jonas <sam@mendozajonas.com>,
Jakub Kicinski <kuba@kernel.org>,
Daniel Bristot de Oliveira <bristot@redhat.com>,
Alexey Klimov <aklimov@redhat.com>,
Ingo Molnar <mingo@redhat.com>
Cc: Yury Norov <yury.norov@gmail.com>
Subject: [PATCH 6/8] cpumask: use find_first_and_bit()
Date: Sat, 12 Jun 2021 05:36:37 -0700 [thread overview]
Message-ID: <20210612123639.329047-7-yury.norov@gmail.com> (raw)
In-Reply-To: <20210612123639.329047-1-yury.norov@gmail.com>
Now we have an efficient implementation for find_first_and_bit(),
so switch cpumask to use it where appropriate.
Signed-off-by: Yury Norov <yury.norov@gmail.com>
---
include/linux/cpumask.h | 30 ++++++++++++++++++++----------
1 file changed, 20 insertions(+), 10 deletions(-)
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index bfc4690de4f4..6bee58600946 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -123,6 +123,12 @@ static inline unsigned int cpumask_first(const struct cpumask *srcp)
return 0;
}
+static inline unsigned int cpumask_first_and(const struct cpumask *srcp1,
+ const struct cpumask *srcp2)
+{
+ return 0;
+}
+
static inline unsigned int cpumask_last(const struct cpumask *srcp)
{
return 0;
@@ -167,7 +173,7 @@ static inline unsigned int cpumask_local_spread(unsigned int i, int node)
static inline int cpumask_any_and_distribute(const struct cpumask *src1p,
const struct cpumask *src2p) {
- return cpumask_next_and(-1, src1p, src2p);
+ return cpumask_first_and(src1p, src2p);
}
static inline int cpumask_any_distribute(const struct cpumask *srcp)
@@ -195,6 +201,19 @@ static inline unsigned int cpumask_first(const struct cpumask *srcp)
return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits);
}
+/**
+ * cpumask_first_and - return the first cpu from *srcp1 & *srcp2
+ * @src1p: the first input
+ * @src2p: the second input
+ *
+ * Returns >= nr_cpu_ids if no cpus set in both. See also cpumask_next_and().
+ */
+static inline
+unsigned int cpumask_first_and(const struct cpumask *srcp1, const struct cpumask *srcp2)
+{
+ return find_first_and_bit(cpumask_bits(srcp1), cpumask_bits(srcp2), nr_cpumask_bits);
+}
+
/**
* cpumask_last - get the last CPU in a cpumask
* @srcp: - the cpumask pointer
@@ -585,15 +604,6 @@ static inline void cpumask_copy(struct cpumask *dstp,
*/
#define cpumask_any(srcp) cpumask_first(srcp)
-/**
- * cpumask_first_and - return the first cpu from *srcp1 & *srcp2
- * @src1p: the first input
- * @src2p: the second input
- *
- * Returns >= nr_cpu_ids if no cpus set in both. See also cpumask_next_and().
- */
-#define cpumask_first_and(src1p, src2p) cpumask_next_and(-1, (src1p), (src2p))
-
/**
* cpumask_any_and - pick a "random" cpu from *mask1 & *mask2
* @mask1: the first input cpumask
--
2.30.2
next prev parent reply other threads:[~2021-06-12 12:38 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-12 12:36 [PATCH 0/8] all: use find_next_*_bit() instead of find_first_*_bit() where possible Yury Norov
2021-06-12 12:36 ` [PATCH 1/8] bitops: protect find_first_{,zero}_bit properly Yury Norov
2021-06-12 21:38 ` Andy Shevchenko
2021-06-29 1:29 ` Yury Norov
2021-06-12 12:36 ` [PATCH 2/8] bitops: move find_bit_*_le functions from le.h to find.h Yury Norov
2021-06-12 12:36 ` [PATCH 3/8] include: move find.h from asm_generic to linux Yury Norov
2021-06-12 12:36 ` [PATCH RESEND 4/8] arch: remove GENERIC_FIND_FIRST_BIT entirely Yury Norov
2021-06-12 12:36 ` [PATCH 5/8] lib: add find_first_and_bit() Yury Norov
2021-06-14 15:45 ` Alexey Klimov
2021-06-12 12:36 ` Yury Norov [this message]
2021-06-12 12:36 ` [PATCH 7/8] all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate Yury Norov
2021-06-12 21:47 ` Andy Shevchenko
2021-06-13 0:32 ` Yury Norov
[not found] ` <CAHp75VeXJcPai=w3Fbx11TPf_CZTusD6U_E2R+XSaCcebV7uBw@mail.gmail.com>
2021-06-15 1:07 ` Andrew Morton
2021-06-12 12:36 ` [PATCH 8/8] tools: sync tools/bitmap with mother linux Yury Norov
2021-06-13 23:16 ` [PATCH] cpumask: replace cpumask_next_* with cpumask_first_* where appropriate Yury Norov
2021-06-29 1:48 ` [PATCH 0/8] all: use find_next_*_bit() instead of find_first_*_bit() where possible Yury Norov
2021-06-29 16:18 ` Andy Shevchenko
2021-07-28 15:00 ` Yury Norov
2021-07-28 15:13 ` Joe Perches
2021-07-28 15:55 ` Yury Norov
2021-07-28 16:06 ` Joe Perches
2021-07-28 16:28 ` Yury Norov
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