linux-hardening - [PATCH 4.19 v2 07/15] ia64: make IA64_MCA

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Message-Id: <20230203002717.49198-8-ebiggers@kernel.org>
Date:   Thu,  2 Feb 2023 16:27:09 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     stable@...r.kernel.org
Cc:     Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>,
        Kees Cook <keescook@...omium.org>,
        SeongJae Park <sj@...nel.org>,
        Seth Jenkins <sethjenkins@...gle.com>,
        Jann Horn <jannh@...gle.com>,
        "Eric W . Biederman" <ebiederm@...ssion.com>,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tony Luck <tony.luck@...el.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Christoph Hellwig <hch@...radead.org>,
        Christoph Hellwig <hch@....de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 4.19 v2 07/15] ia64: make IA64_MCA_RECOVERY bool instead of tristate

From: Randy Dunlap <rdunlap@...radead.org>

commit dbecf9b8b8ce580f4e11afed9d61e8aa294cddd2 upstream.

In linux-next, IA64_MCA_RECOVERY uses the (new) function
make_task_dead(), which is not exported for use by modules.  Instead of
exporting it for one user, convert IA64_MCA_RECOVERY to be a bool
Kconfig symbol.

In a config file from "kernel test robot <lkp@...el.com>" for a
different problem, this linker error was exposed when
CONFIG_IA64_MCA_RECOVERY=m.

Fixes this build error:

  ERROR: modpost: "make_task_dead" [arch/ia64/kernel/mca_recovery.ko] undefined!

Link: https://lkml.kernel.org/r/20220124213129.29306-1-rdunlap@infradead.org
Fixes: 0e25498f8cd4 ("exit: Add and use make_task_dead.")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Suggested-by: Christoph Hellwig <hch@...radead.org>
Reviewed-by: Christoph Hellwig <hch@....de>
Reviewed-by: "Eric W. Biederman" <ebiederm@...ssion.com>
Cc: Tony Luck <tony.luck@...el.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 arch/ia64/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 8b4a0c1748c03..0d56b19b7511a 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -445,7 +445,7 @@ config ARCH_PROC_KCORE_TEXT
 	depends on PROC_KCORE
 
 config IA64_MCA_RECOVERY
-	tristate "MCA recovery from errors other than TLB."
+	bool "MCA recovery from errors other than TLB."
 
 config PERFMON
 	bool "Performance monitor support"
-- 
2.39.1