Re: [PATCH] c/r: fix broken compilation for architectures that don't support c/r

["Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

Quoting Oren Laadan (orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org):
> The include file <linux/checkpoint_hdr.h> itself includes the header
> <asm/checkpoint_hdr.h>, which exists only for supported architectures.
> 
> Therefore, non c/r specific code must not include it unconditionally,
> but only when CONFIG_CHECKPOINT is defined.
> 
> Instead, either use include <linux/checkpoint.h>, which take the
> necessary precautions (preferred), or explicit test CONFIG_CHECKPOINT.
> 
> This patch fixes this in eventfd.c and eventpoll.c, to allow a kernel
> with the c/r patches to compile on other architectures.
> 
> (Reported by: Christoffer Dall)
> 
> Signed-off-by: Oren Laadan <orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org>
> ---
>  fs/eventfd.c   |    1 -
>  fs/eventpoll.c |    5 -----
>  2 files changed, 0 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/eventfd.c b/fs/eventfd.c
> index 5259d6e..3277534 100644
> --- a/fs/eventfd.c
> +++ b/fs/eventfd.c
> @@ -19,7 +19,6 @@
>  #include <linux/kref.h>
>  #include <linux/eventfd.h>
>  #include <linux/checkpoint.h>
> -#include <linux/checkpoint_hdr.h>
> 
>  struct eventfd_ctx {
>  	struct kref kref;
> diff --git a/fs/eventpoll.c b/fs/eventpoll.c
> index cb286c7..aedaf87 100644
> --- a/fs/eventpoll.c
> +++ b/fs/eventpoll.c
> @@ -38,12 +38,7 @@
>  #include <asm/io.h>
>  #include <asm/mman.h>
>  #include <asm/atomic.h>
> -
> -#ifdef CONFIG_CHECKPOINT
>  #include <linux/checkpoint.h>
> -#include <linux/checkpoint_hdr.h>
> -#include <linux/deferqueue.h>

Where does deferqueue.h get included from, though?

Kind of looks like checkpoint_types.h should include that anyway,
then we can remove the explicit include from
checkpoint{checkpoint,files,restart,sys}.c

> -#endif
> 
>  /*
>   * LOCKING:
> -- 
> 1.6.3.3
> 
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