Re: [PATCH] staging: lustre: include linux/highmem.h when needed

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On Wed, May 30 2018, Arnd Bergmann wrote:

> Something in recent linux-next kernels caused linux/highmem.h to
> no longer be included implicitly from o2iblnd_cb.c, causing a build
> failure:
>
> drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c: In function 'kiblnd_kvaddr_to_page':
> drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c:549:15: error: 'PKMAP_BASE' undeclared (first use in this function); did you mean 'RTM_BASE'?
>   if (vaddr >= PKMAP_BASE &&
>                ^~~~~~~~~~
>                RTM_BASE
> drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c:549:15: note: each undeclared identifier is reported only once for each function it appears in
> drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c:550:28: error: 'LAST_PKMAP' undeclared (first use in this function); did you mean 'AT_HWCAP'?
>       vaddr < (PKMAP_BASE + LAST_PKMAP * PAGE_SIZE)) {
>                             ^~~~~~~~~~
>                             AT_HWCAP
>
> This adds back an explicit include for the header.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Thanks for finding and fixing this.  I did recently reduce the number
of include files that were automatically included everywhere.  Clearly
some config combinations didn't get tested properly.

Reviewed-by: NeilBrown <neilb@xxxxxxxx>

Thanks,
NeilBrown


> ---
>  drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c
> index 47eb8b4c28db..65b7a62943ad 100644
> --- a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c
> +++ b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd_cb.c
> @@ -35,6 +35,7 @@
>   * Author: Eric Barton <eric@xxxxxxxxxxxxxxxxxx>
>   */
>  
> +#include <linux/highmem.h>
>  #include "o2iblnd.h"
>  
>  #define MAX_CONN_RACES_BEFORE_ABORT 20
> -- 
> 2.9.0

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