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From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Jan Beulich" <JBeulich@suse.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>, "Wei Liu" <wl@xen.org>
Subject: [PATCH 4/7] x86/irq: Make create_irq() compile at -Og
Date: Mon, 19 Apr 2021 15:01:29 +0100	[thread overview]
Message-ID: <20210419140132.16909-5-andrew.cooper3@citrix.com> (raw)
In-Reply-To: <20210419140132.16909-1-andrew.cooper3@citrix.com>

When compiling at -Og:

  irq.c: In function ‘create_irq’:
  irq.c:310:38: error: ‘desc’ may be used uninitialized in this function[-Werror=maybe-uninitialized]
               desc->arch.creator_domid = currd->domain_id;
               ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~

This diagnostic is bogus, because desc is already read on earlier paths.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Wei Liu <wl@xen.org>
---
 xen/arch/x86/irq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index a1693f92dd..72b86c6155 100644
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -264,7 +264,7 @@ void __init clear_irq_vector(int irq)
 int create_irq(nodeid_t node, bool grant_access)
 {
     int irq, ret;
-    struct irq_desc *desc;
+    struct irq_desc *desc = NULL;
 
     for (irq = nr_irqs_gsi; irq < nr_irqs; irq++)
     {
-- 
2.11.0



  parent reply	other threads:[~2021-04-19 14:02 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-19 14:01 [PATCH 0/7] xen: Switch to using -Og for debug builds Andrew Cooper
2021-04-19 14:01 ` [PATCH 1/7] xen/arm: Make make_cpus_node() compile at -Og Andrew Cooper
2021-04-22 18:20   ` Julien Grall
2021-04-19 14:01 ` [PATCH 2/7] x86/shim: Fix compilation " Andrew Cooper
2021-04-19 14:01 ` [PATCH 3/7] x86/sysctl: Make arch_do_sysctl() compile " Andrew Cooper
2021-04-19 14:01 ` Andrew Cooper [this message]
2021-04-19 14:01 ` [PATCH 5/7] xen/efi: Make efi_start() " Andrew Cooper
2021-04-19 14:01 ` [PATCH 6/7] x86/shadow: Make _shadow_prealloc() " Andrew Cooper
2021-04-22  7:52   ` Tim Deegan
2021-04-19 14:01 ` [PATCH 7/7] xen: Use -Og for debug builds when available Andrew Cooper
2021-04-19 15:45 ` [PATCH 0/7] xen: Switch to using -Og for debug builds Jan Beulich
2021-04-21  9:31   ` Andrew Cooper
2021-04-21  9:51     ` Jan Beulich

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