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From: Tim Deegan <tim@xen.org>
To: Costin Lupu <costin.lupu@cs.pub.ro>
Cc: xen-devel@lists.xenproject.org, Ian Jackson <iwj@xenproject.org>,
	Wei Liu <wl@xen.org>
Subject: Re: [PATCH 1/5] tools/debugger: Fix PAGE_SIZE redefinition error
Date: Thu, 29 Apr 2021 20:58:31 +0100	[thread overview]
Message-ID: <YIsP5z1ejJbUhmPc@deinos.phlegethon.org> (raw)
In-Reply-To: <0cd234096c9bfa8d29eac9906553af79d378733e.1619524463.git.costin.lupu@cs.pub.ro>

Hi,

At 15:05 +0300 on 27 Apr (1619535916), Costin Lupu wrote:
> If PAGE_SIZE is already defined in the system (e.g. in
> /usr/include/limits.h header) then gcc will trigger a redefinition error
> because of -Werror. This commit also protects PAGE_SHIFT definitions for
> keeping consistency.

Thanks for looking into this!  I think properly speaking we should fix
this by defining KDD_PAGE_SHIFT and KDD_PAGE_SIZE in kdd.h and using
those everywhere we currently use PAGE_SIZE/PAGE_SHIFT. in kdd.c and
kdd-xen.c.  If for some reason we ever ended up with a system-defined
PAGE_SIZE that wasn't 4096u then we would not want to use it here
because it would break our guest operations.

Cheers,

Tim


  reply	other threads:[~2021-04-29 19:59 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-27 12:05 [PATCH 0/5] Fix redefinition errors for toolstack libs Costin Lupu
2021-04-27 12:05 ` [PATCH 1/5] tools/debugger: Fix PAGE_SIZE redefinition error Costin Lupu
2021-04-29 19:58   ` Tim Deegan [this message]
2021-04-30 11:36     ` Costin Lupu
2021-04-30 18:45       ` Tim Deegan
2021-04-30 19:33         ` Costin Lupu
2021-04-27 12:05 ` [PATCH 2/5] tools/libfsimage: Fix PATH_MAX " Costin Lupu
2021-04-28  9:04   ` Julien Grall
2021-04-28 18:35     ` Costin Lupu
2021-04-29 11:39       ` Julien Grall
2021-04-27 12:05 ` [PATCH 3/5] tools/libs/foreignmemory: Fix PAGE_SIZE " Costin Lupu
2021-04-28  9:03   ` Julien Grall
2021-04-28 18:27     ` Costin Lupu
2021-04-29 11:29       ` Julien Grall
2021-04-27 12:05 ` [PATCH 4/5] tools/libs/gnttab: " Costin Lupu
2021-04-27 12:05 ` [PATCH 5/5] tools/ocaml: Fix redefinition errors Costin Lupu
2021-04-28 12:34 ` [PATCH 0/5] Fix redefinition errors for toolstack libs Christian Lindig
2021-04-28 18:37   ` Costin Lupu

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