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From: Jessica Yu <jeyu@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	open list <linux-kernel@vger.kernel.org>,
	live-patching@vger.kernel.org
Subject: Re: [PATCH 2/7] modules: mark find_symbol static
Date: Wed, 29 Jul 2020 18:13:18 +0200
Message-ID: <20200729161318.GA30898@linux-8ccs> (raw)
In-Reply-To: <20200729062711.13016-3-hch@lst.de>

+++ Christoph Hellwig [29/07/20 08:27 +0200]:
>find_symbol is only used in module.c.
>
>Signed-off-by: Christoph Hellwig <hch@lst.de>

CCing the livepatching ML, as this may or may not impact its users.

AFAIK, the out-of-tree kpatch module had used find_symbol() in the
past, I am not sure what its current status is. I suspect all of its
functionality has been migrated to upstream livepatch already.

>---
> include/linux/module.h | 11 -----------
> kernel/module.c        |  3 +--
> 2 files changed, 1 insertion(+), 13 deletions(-)
>
>diff --git a/include/linux/module.h b/include/linux/module.h
>index f1fdbeef2153a8..90bdc362be3681 100644
>--- a/include/linux/module.h
>+++ b/include/linux/module.h
>@@ -590,17 +590,6 @@ struct symsearch {
> 	bool unused;
> };
>
>-/*
>- * Search for an exported symbol by name.
>- *
>- * Must be called with module_mutex held or preemption disabled.
>- */
>-const struct kernel_symbol *find_symbol(const char *name,
>-					struct module **owner,
>-					const s32 **crc,
>-					bool gplok,
>-					bool warn);
>-
> /*
>  * Walk the exported symbol table
>  *
>diff --git a/kernel/module.c b/kernel/module.c
>index 17d64dae756c80..84da96a6d8241c 100644
>--- a/kernel/module.c
>+++ b/kernel/module.c
>@@ -585,7 +585,7 @@ static bool find_exported_symbol_in_section(const struct symsearch *syms,
>
> /* Find an exported symbol and return it, along with, (optional) crc and
>  * (optional) module which owns it.  Needs preempt disabled or module_mutex. */
>-const struct kernel_symbol *find_symbol(const char *name,
>+static const struct kernel_symbol *find_symbol(const char *name,
> 					struct module **owner,
> 					const s32 **crc,
> 					bool gplok,
>@@ -608,7 +608,6 @@ const struct kernel_symbol *find_symbol(const char *name,
> 	pr_debug("Failed to find symbol %s\n", name);
> 	return NULL;
> }
>-EXPORT_SYMBOL_GPL(find_symbol);
>
> /*
>  * Search for module by name: must hold module_mutex (or preempt disabled
>-- 
>2.27.0
>

       reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200729062711.13016-1-hch@lst.de>
     [not found] ` <20200729062711.13016-3-hch@lst.de>
2020-07-29 16:13   ` Jessica Yu [this message]
2020-07-29 16:24     ` Greg Kroah-Hartman
2020-07-29 17:06       ` Christoph Hellwig
2020-07-29 17:25       ` Joe Lawrence

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