linux-kernel - Re: linux-next: voyager tree build failure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1244560718.4137.26.camel@mulgrave.site>
Date:	Tue, 09 Jun 2009 10:18:38 -0500
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: voyager tree build failure

On Tue, 2009-06-09 at 19:40 +1000, Stephen Rothwell wrote:
> Hi James,
> 
> Today's linux-next build (x86_64 allmodconfig) failed like this:
> 
> arch/x86/xen/smp.c:478: error: 'apic_safe_smp_processor_id' undeclared here (not in a function)
> arch/x86/kernel/smp.c:219: error: 'apic_safe_smp_processor_id' undeclared here (not in a function)
> 
> Caused by commit 6a6df48477c1959b1baa78ecabba72548d362f60 ("[VOYAGER]
> x86: add {safe,hard}_smp_processor_id to smp_ops").
> 
> I have dropped the voyager tree for today.

Thanks for finding this.  The fix looks to be a dummy definition of this
function for x86_64.  The final fix (which has been under discussion)
will be the elimination of safe_smp_processor_id() altogether.

I've merged this into the

[VOYAGER] x86: add {safe,hard}_smp_processor_id to smp_ops

patch and respun the tree (and built it with an x86-64 cross compiler),
so it should be safe to include next time around

Thanks,

James

---

diff -u b/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
--- b/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -177,6 +177,15 @@
 	ti->cpu;							\
 })
 #define safe_smp_processor_id()		smp_processor_id()
+/*
+ * dummy function for smp_ops.safe_smp_processor_id() which is unused
+ * on x86_64.  This will also break the build if the definition leaks
+ * outside of the guards in kernel/apic/ipi.c on x86_64
+ */
+static inline int apic_safe_smp_processor_id(void)
+{
+	return 0;
+}
 
 #endif
 


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/