linux-kernel - Re: linux-next: build failure after merge of the ext4 tree

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Message-Id: <20120106080603.b4f9e591cf61204c94e84fed@canb.auug.org.au>
Date:	Fri, 6 Jan 2012 08:06:03 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Theodore Tso <tytso@....EDU>
Cc:	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yongqiang Yang <xiaoqiangnk@...il.com>, Jan Kara <jack@...e.cz>
Subject: Re: linux-next: build failure after merge of the ext4 tree

HI Ted,

On Tue, 3 Jan 2012 11:35:33 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> After merging the ext4 tree, today's linux-next build (powerpc
> ppc64_defconfig) failed like this:
> 
> fs/jbd2/built-in.o: In function `journal_clear_buffer_revoked_flags':
> (.opd+0x5b8): multiple definition of `journal_clear_buffer_revoked_flags'
> fs/jbd/built-in.o:(.opd+0x570): first defined here
> fs/jbd2/built-in.o: In function `.journal_clear_buffer_revoked_flags':
> (.text+0x7e80): multiple definition of `.journal_clear_buffer_revoked_flags'
> fs/jbd/built-in.o:(.text+0x7970): first defined here
> 
> Caused by commit 7834c98154f1 ("jbd2: clear revoked flag on buffers
> before a new transaction started") interacting with commit 8c111b3f5633
> ("jbd: clear revoked flag on buffers before a new transaction started")
> form the ext3 tree.
> 
> I applied this merge fix patch:
> 
> From: Stephen Rothwell <sfr@...b.auug.org.au>
> Date: Tue, 3 Jan 2012 11:31:37 +1100
> Subject: [PATCH] jbd2: sanitize a new global symbol
>  (journal_clear_buffer_revoked_flags)
> 
> Fixes these build errors (when combined with the ext3 tree):
> 
> fs/jbd2/built-in.o: In function `journal_clear_buffer_revoked_flags':
> (.opd+0x5b8): multiple definition of `journal_clear_buffer_revoked_flags'
> fs/jbd/built-in.o:(.opd+0x570): first defined here
> 
> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
> ---
>  fs/jbd2/commit.c     |    2 +-
>  fs/jbd2/revoke.c     |    2 +-
>  include/linux/jbd2.h |    2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
> index 7f99e17..3f5c545 100644
> --- a/fs/jbd2/commit.c
> +++ b/fs/jbd2/commit.c
> @@ -433,7 +433,7 @@ void jbd2_journal_commit_transaction(journal_t *journal)
>  	 * Clear revoked flag to reflect there is no revoked buffers
>  	 * in the next transaction which is going to be started.
>  	 */
> -	journal_clear_buffer_revoked_flags(journal);
> +	jbd2_journal_clear_buffer_revoked_flags(journal);
>  
>  	/*
>  	 * Switch to a new revoke table.
> diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
> index 1c36138..c99d839 100644
> --- a/fs/jbd2/revoke.c
> +++ b/fs/jbd2/revoke.c
> @@ -487,7 +487,7 @@ int jbd2_journal_cancel_revoke(handle_t *handle, struct journal_head *jh)
>   * revoke table to reflect there is no revoked buffers in the next
>   * transaction which is going to be started.
>   */
> -void journal_clear_buffer_revoked_flags(journal_t *journal)
> +void jbd2_journal_clear_buffer_revoked_flags(journal_t *journal)
>  {
>  	struct jbd2_revoke_table_s *revoke = journal->j_revoke;
>  	int i = 0;
> diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
> index 17bf089..44b8072 100644
> --- a/include/linux/jbd2.h
> +++ b/include/linux/jbd2.h
> @@ -1151,7 +1151,7 @@ extern int	jbd2_journal_set_revoke(journal_t *, unsigned long long, tid_t);
>  extern int	jbd2_journal_test_revoke(journal_t *, unsigned long long, tid_t);
>  extern void	jbd2_journal_clear_revoke(journal_t *);
>  extern void	jbd2_journal_switch_revoke_table(journal_t *journal);
> -extern void	journal_clear_buffer_revoked_flags(journal_t *journal);
> +extern void	jbd2_journal_clear_buffer_revoked_flags(journal_t *journal);
>  
>  /*
>   * The log thread user interface:

Ping?

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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