From: Arnd Bergmann <arnd@arndb.de>
To: Christian Benvenuti <benve@cisco.com>,
Govindarajulu Varadarajan <_govind@gmx.com>,
Parvi Kaustubhi <pkaustub@cisco.com>,
"David S. Miller" <davem@davemloft.net>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
Nathan Chancellor <natechancellor@gmail.com>,
Arnd Bergmann <arnd@arndb.de>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] [v2] enic: fix build warning without CONFIG_CPUMASK_OFFSTACK
Date: Thu, 7 Mar 2019 16:52:24 +0100 [thread overview]
Message-ID: <20190307155230.2923527-1-arnd@arndb.de> (raw)
The enic driver relies on the CONFIG_CPUMASK_OFFSTACK feature to
dynamically allocate a struct member, but this is normally intended for
local variables.
Building with clang, I get a warning for a few locations that check the
address of the cpumask_var_t:
drivers/net/ethernet/cisco/enic/enic_main.c:122:22: error: address of array 'enic->msix[i].affinity_mask' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]
As far as I can tell, the code is still correct, as the truth value of
the pointer is what we need in this configuration. To get rid of
the warning, use cpumask_available() instead of checking the
pointer directly.
Fixes: 322cf7e3a4e8 ("enic: assign affinity hint to interrupts")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
v2: use cpumask_available() instead of open-coding a copy
---
drivers/net/ethernet/cisco/enic/enic_main.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 9a7f70db20c7..733d9172425b 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -119,7 +119,7 @@ static void enic_init_affinity_hint(struct enic *enic)
for (i = 0; i < enic->intr_count; i++) {
if (enic_is_err_intr(enic, i) || enic_is_notify_intr(enic, i) ||
- (enic->msix[i].affinity_mask &&
+ (cpumask_available(enic->msix[i].affinity_mask) &&
!cpumask_empty(enic->msix[i].affinity_mask)))
continue;
if (zalloc_cpumask_var(&enic->msix[i].affinity_mask,
@@ -148,7 +148,7 @@ static void enic_set_affinity_hint(struct enic *enic)
for (i = 0; i < enic->intr_count; i++) {
if (enic_is_err_intr(enic, i) ||
enic_is_notify_intr(enic, i) ||
- !enic->msix[i].affinity_mask ||
+ !cpumask_available(enic->msix[i].affinity_mask) ||
cpumask_empty(enic->msix[i].affinity_mask))
continue;
err = irq_set_affinity_hint(enic->msix_entry[i].vector,
@@ -161,7 +161,7 @@ static void enic_set_affinity_hint(struct enic *enic)
for (i = 0; i < enic->wq_count; i++) {
int wq_intr = enic_msix_wq_intr(enic, i);
- if (enic->msix[wq_intr].affinity_mask &&
+ if (cpumask_available(enic->msix[wq_intr].affinity_mask) &&
!cpumask_empty(enic->msix[wq_intr].affinity_mask))
netif_set_xps_queue(enic->netdev,
enic->msix[wq_intr].affinity_mask,
--
2.20.0
next reply other threads:[~2019-03-07 15:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-07 15:52 Arnd Bergmann [this message]
2019-03-07 15:59 ` [PATCH] [v2] enic: fix build warning without CONFIG_CPUMASK_OFFSTACK Nathan Chancellor
2019-03-07 17:42 ` David Miller
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