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Date: Thu, 17 Jul 2014 20:37:34 +0200 (CEST) From: Fabian Frederick <fabf@...net.be> To: Zach Brown <zab@...bo.net> Cc: Josef Bacik <jbacik@...com>, linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org, Chris Mason <clm@...com> Subject: Re: [PATCH 1/1] Btrfs: fix sparse warning > On 16 July 2014 at 19:20 Zach Brown <zab@...bo.net> wrote: > > > On Tue, Jul 15, 2014 at 09:17:17PM +0200, Fabian Frederick wrote: > > Fix the following sparse warning: > > fs/btrfs/send.c:518:51: warning: incorrect type in argument 2 (different > > address spaces) > > fs/btrfs/send.c:518:51: expected char const [noderef] * > > fs/btrfs/send.c:518:51: got char * > > > > We can safely use (const char __user *) with set_fs(KERNEL_DS) > > Yeah, that cast is correct. > > Reviewed-by: Zach Brown <zab@...bo.net> > > > @@ -515,7 +515,8 @@ static int write_buf(struct file *filp, const void *buf, > > u32 len, loff_t *off) > > Though this probably wants to be rewritten in terms of kernel_write(). > That'd give an opportunity to get rid of the sctx->send_off and have it > use f_pos in the filp. Do you mean directly call kernel_write from send_cmd/send_header ? I guess that loop around vfs_write in write_buf is there for something ... Fabian > > - z -- 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/
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