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Message-Id: <20211218212014.1315894-2-yury.norov@gmail.com>
Date: Sat, 18 Dec 2021 13:19:57 -0800
From: Yury Norov <yury.norov@...il.com>
To: linux-kernel@...r.kernel.org, Yury Norov <yury.norov@...il.com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Michał Mirosław <mirq-linux@...e.qmqm.pl>,
"Paul E. McKenney" <paulmck@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alexey Klimov <aklimov@...hat.com>,
Amitkumar Karwar <amitkarwar@...il.com>,
Andi Kleen <ak@...ux.intel.com>, Andrew Lunn <andrew@...n.ch>,
Andrew Morton <akpm@...ux-foundation.org>,
Andy Gross <agross@...nel.org>,
Andy Lutomirski <luto@...nel.org>,
Andy Shevchenko <andy@...radead.org>,
Anup Patel <anup.patel@....com>,
Ard Biesheuvel <ardb@...nel.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
Catalin Marinas <catalin.marinas@....com>,
Christoph Hellwig <hch@....de>,
Christoph Lameter <cl@...ux.com>,
Daniel Vetter <daniel@...ll.ch>,
Dave Hansen <dave.hansen@...ux.intel.com>,
David Airlie <airlied@...ux.ie>,
David Laight <David.Laight@...LAB.COM>,
Dennis Zhou <dennis@...nel.org>,
Emil Renner Berthing <kernel@...il.dk>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Geetha sowjanya <gakula@...vell.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Guo Ren <guoren@...nel.org>,
Hans de Goede <hdegoede@...hat.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Ian Rogers <irogers@...gle.com>,
Ingo Molnar <mingo@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
Jason Wessel <jason.wessel@...driver.com>,
Jens Axboe <axboe@...com>, Jiri Olsa <jolsa@...hat.com>,
Joe Perches <joe@...ches.com>,
Jonathan Cameron <jic23@...nel.org>,
Juri Lelli <juri.lelli@...hat.com>,
Kees Cook <keescook@...omium.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
Lee Jones <lee.jones@...aro.org>,
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Mel Gorman <mgorman@...e.de>,
Michael Ellerman <mpe@...erman.id.au>,
Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
Nicholas Piggin <npiggin@...il.com>,
Palmer Dabbelt <palmer@...belt.com>,
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Randy Dunlap <rdunlap@...radead.org>,
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Thomas Gleixner <tglx@...utronix.de>,
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Will Deacon <will@...nel.org>,
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Subject: [PATCH 01/17] all: don't use bitmap_weight() where possible
Don't call bitmap_weight() if the following code can get by
without it.
Signed-off-by: Yury Norov <yury.norov@...il.com>
---
drivers/net/dsa/b53/b53_common.c | 6 +-----
drivers/net/ethernet/broadcom/bcmsysport.c | 6 +-----
drivers/thermal/intel/intel_powerclamp.c | 9 +++------
3 files changed, 5 insertions(+), 16 deletions(-)
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 3867f3d4545f..9a10d80125d9 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1620,12 +1620,8 @@ static int b53_arl_read(struct b53_device *dev, u64 mac,
return 0;
}
- if (bitmap_weight(free_bins, dev->num_arl_bins) == 0)
- return -ENOSPC;
-
*idx = find_first_bit(free_bins, dev->num_arl_bins);
-
- return -ENOENT;
+ return *idx >= dev->num_arl_bins ? -ENOSPC : -ENOENT;
}
static int b53_arl_op(struct b53_device *dev, int op, int port,
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 40933bf5a710..241696fdc6c7 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2177,13 +2177,9 @@ static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv,
if (nfc->fs.ring_cookie != RX_CLS_FLOW_WAKE)
return -EOPNOTSUPP;
- /* All filters are already in use, we cannot match more rules */
- if (bitmap_weight(priv->filters, RXCHK_BRCM_TAG_MAX) ==
- RXCHK_BRCM_TAG_MAX)
- return -ENOSPC;
-
index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX);
if (index >= RXCHK_BRCM_TAG_MAX)
+ /* All filters are already in use, we cannot match more rules */
return -ENOSPC;
/* Location is the classification ID, and index is the position
diff --git a/drivers/thermal/intel/intel_powerclamp.c b/drivers/thermal/intel/intel_powerclamp.c
index 14256421d98c..c841ab37e7c6 100644
--- a/drivers/thermal/intel/intel_powerclamp.c
+++ b/drivers/thermal/intel/intel_powerclamp.c
@@ -556,12 +556,9 @@ static void end_power_clamp(void)
* stop faster.
*/
clamping = false;
- if (bitmap_weight(cpu_clamping_mask, num_possible_cpus())) {
- for_each_set_bit(i, cpu_clamping_mask, num_possible_cpus()) {
- pr_debug("clamping worker for cpu %d alive, destroy\n",
- i);
- stop_power_clamp_worker(i);
- }
+ for_each_set_bit(i, cpu_clamping_mask, num_possible_cpus()) {
+ pr_debug("clamping worker for cpu %d alive, destroy\n", i);
+ stop_power_clamp_worker(i);
}
}
--
2.30.2
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