linux-kernel - Re: [PATCH 1/2] btrfs: avoid passing int param to start

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Message-ID: <pan.2015.09.13.14.53.14@googlemail.com>
Date:	Sun, 13 Sep 2015 14:53:14 +0000 (UTC)
From:	Holger Hoffstätte 
	<holger.hoffstaette@...glemail.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-btrfs@...r.kernel.org
Subject: Re: [PATCH 1/2] btrfs: avoid passing int param to start_transaction
 which takes u64

On Sun, 13 Sep 2015 14:29:41 +0000, Alexandru Moise wrote:

> Signed-off-by: Alexandru Moise <00moses.alexander00@...il.com>
> ---
>  fs/btrfs/transaction.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
> index 8f259b3..8a83acd 100644
> --- a/fs/btrfs/transaction.c
> +++ b/fs/btrfs/transaction.c
> @@ -570,7 +570,7 @@ reserve_fail:
>  }
>  
>  struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
> -						   int num_items)
> +						   u64 num_items)
>  {
>  	return start_transaction(root, num_items, TRANS_START,
>  				 BTRFS_RESERVE_FLUSH_ALL);

So I tried to build this..you won't believe what happened next:

  CC [M]  fs/btrfs/transaction.o
fs/btrfs/transaction.c:570:28: error: conflicting types for 'btrfs_start_transaction'
 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
                            ^
In file included from fs/btrfs/transaction.c:28:0:
fs/btrfs/transaction.h:186:28: note: previous declaration of 'btrfs_start_transaction' was here
 struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
                            ^
scripts/Makefile.build:258: recipe for target 'fs/btrfs/transaction.o' failed

You need to update transaction.h as well.

-h

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