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To: Anton Blanchard <anton@samba.org>, benh@kernel.crashing.org,
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 Rashmica <rashmicy@gmail.com>
From: Michael Ellerman <mpe@ellerman.id.au>
Subject: Re: [v2] powerpc: Call restore_sprs() before _switch()
Message-Id: <20151214094750.1E3C5140323@ozlabs.org>
Date: Mon, 14 Dec 2015 20:47:50 +1100 (AEDT)
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On Thu, 2015-10-12 at 09:44:39 UTC, Anton Blanchard wrote:
> commit 152d523e6307 ("powerpc: Create context switch helpers save_sprs()
> and restore_sprs()") moved the restore of SPRs after the call to _switch().
> 
> There is an issue with this approach - new tasks do not return through
> _switch(), they are set up by copy_thread() to directly return through
> ret_from_fork() or ret_from_kernel_thread(). This means restore_sprs() is
> not getting called for new tasks.
> 
> Fix this by moving restore_sprs() before _switch().
> 
> Signed-off-by: Anton Blanchard <anton@samba.org>
> Fixes: 152d523e6307 ("powerpc: Create context switch helpers save_sprs() and restore_sprs()")

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/20dbe67062062c2a790832f0

cheers