On Tue, Nov 25, 2014 at 12:43:25PM +0100, David Hildenbrand wrote:
> Whenever we have pagefaults disabled, we have to use the atomic variants of
> (set|get)_user and copy_(from|to)_user.
>
> Signed-off-by: David Hildenbrand <d...@linux.vnet.ibm.com>
> ---
> arch/powerpc/sysdev/fsl_pci.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
> index 65d2ed4..c0af4ef 100644
> --- a/arch/powerpc/sysdev/fsl_pci.c
> +++ b/arch/powerpc/sysdev/fsl_pci.c
> @@ -1025,7 +1025,7 @@ int fsl_pci_mcheck_exception(struct pt_regs *regs)
> if (is_in_pci_mem_space(addr)) {
> if (user_mode(regs)) {
> pagefault_disable();
> - ret = get_user(regs->nip, &inst);
> + ret = __get_user_inatomic(regs->nip, &inst);
> pagefault_enable();
> } else {
> ret = probe_kernel_address(regs->nip, inst);
Please post a non-RFC version if you're ready for this to be merged.
-Scott
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