From: Mikko Rapeli <mikko.rapeli@iki.fi> To: David Vrabel <david.vrabel@citrix.com> Cc: linux-kernel@vger.kernel.org, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Russell King <linux@arm.linux.org.uk>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, xen-devel@lists.xenproject.org, linux-arm-kernel@lists.infradead.org, linux-api@vger.kernel.org Subject: Re: [PATCH v4 75/79] include/uapi/xen/privcmd.h: fix compilation in userspace Date: Thu, 15 Oct 2015 14:18:01 +0300 [thread overview] Message-ID: <20151015111801.GW6104@lakka.kapsi.fi> (raw) In-Reply-To: <561F7FF8.9030703@citrix.com> On Thu, Oct 15, 2015 at 11:29:12AM +0100, David Vrabel wrote: > On 15/10/15 06:56, Mikko Rapeli wrote: > > xen/interface/xen.h is not exported from kernel headers so remove the > > dependency and provide needed defines for domid_t and xen_pfn_t if they > > are not already defined by some other e.g. Xen specific headers. > > > > Suggested by Andrew Cooper <andrew.cooper3@citrix.com> on lkml message > > <5569F9C9.8000607@citrix.com>. > > > > The ifdef for ARM is ugly but did not find better solutions for it. > > > > Fixes userspace compilation error: > > > > xen/privcmd.h:38:31: fatal error: xen/interface/xen.h: No such file or directory > [...] > > --- a/include/uapi/xen/privcmd.h > > +++ b/include/uapi/xen/privcmd.h > > @@ -35,7 +35,19 @@ > > > > #include <linux/types.h> > > #include <linux/compiler.h> > > -#include <xen/interface/xen.h> > > + > > +/* Might be defined by Xen specific headers, but if not */ > > +#ifndef domid_t > > +typedef __u16 domid_t; > > +#endif /* domid_t */ > > As the kbuild bot points out, this does not work since the existence of > a typedef cannot be checked with #ifdef. Yeah, this hack doesn't cut it. Sorry. Tried to implement these changes: http://www.spinics.net/lists/linux-api/msg11048.html > I'm not really sure what problem you're trying to solve. A user space > program making use of this interface gets the domid_t and xen_pfn_t etc > typedefs from the headers provided as part of the libxenctrl library. I'm trying to make sure that kernel headers in userspace compile with minimal dependencies which are gcc and libc. For me it is clear by now that many Linux API's and ABI's like Xen parts do not live in the uapi header files and instead there's a separate userspace library with needed headers and defines which have embedded copies of the needed API and ABI definitions, like header files. So how could this file be changed so that it compiles in userspace without definitions from libxenctrl? I guess I could copy the needed definitions for domid_t and xen_pfn_t from xen/interface/xen.h of libxenctrl. That I should have done to begin with instead of trying to hack something on my own. -Mikko
WARNING: multiple messages have this Message-ID (diff)
From: mikko.rapeli@iki.fi (Mikko Rapeli) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 75/79] include/uapi/xen/privcmd.h: fix compilation in userspace Date: Thu, 15 Oct 2015 14:18:01 +0300 [thread overview] Message-ID: <20151015111801.GW6104@lakka.kapsi.fi> (raw) In-Reply-To: <561F7FF8.9030703@citrix.com> On Thu, Oct 15, 2015 at 11:29:12AM +0100, David Vrabel wrote: > On 15/10/15 06:56, Mikko Rapeli wrote: > > xen/interface/xen.h is not exported from kernel headers so remove the > > dependency and provide needed defines for domid_t and xen_pfn_t if they > > are not already defined by some other e.g. Xen specific headers. > > > > Suggested by Andrew Cooper <andrew.cooper3@citrix.com> on lkml message > > <5569F9C9.8000607@citrix.com>. > > > > The ifdef for ARM is ugly but did not find better solutions for it. > > > > Fixes userspace compilation error: > > > > xen/privcmd.h:38:31: fatal error: xen/interface/xen.h: No such file or directory > [...] > > --- a/include/uapi/xen/privcmd.h > > +++ b/include/uapi/xen/privcmd.h > > @@ -35,7 +35,19 @@ > > > > #include <linux/types.h> > > #include <linux/compiler.h> > > -#include <xen/interface/xen.h> > > + > > +/* Might be defined by Xen specific headers, but if not */ > > +#ifndef domid_t > > +typedef __u16 domid_t; > > +#endif /* domid_t */ > > As the kbuild bot points out, this does not work since the existence of > a typedef cannot be checked with #ifdef. Yeah, this hack doesn't cut it. Sorry. Tried to implement these changes: http://www.spinics.net/lists/linux-api/msg11048.html > I'm not really sure what problem you're trying to solve. A user space > program making use of this interface gets the domid_t and xen_pfn_t etc > typedefs from the headers provided as part of the libxenctrl library. I'm trying to make sure that kernel headers in userspace compile with minimal dependencies which are gcc and libc. For me it is clear by now that many Linux API's and ABI's like Xen parts do not live in the uapi header files and instead there's a separate userspace library with needed headers and defines which have embedded copies of the needed API and ABI definitions, like header files. So how could this file be changed so that it compiles in userspace without definitions from libxenctrl? I guess I could copy the needed definitions for domid_t and xen_pfn_t from xen/interface/xen.h of libxenctrl. That I should have done to begin with instead of trying to hack something on my own. -Mikko
next prev parent reply other threads:[~2015-10-15 11:18 UTC|newest] Thread overview: 206+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-10-15 5:55 [PATCH v4 00/79] Userspace compile test and fixes for exported uapi header files Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 01/79] headers_install.sh: enhance error handling Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 02/79] scripts/headers_compile_test.sh: compile test script for exported headers Mikko Rapeli 2015-10-15 7:17 ` Alexander Stein 2015-10-15 7:29 ` Mikko Rapeli 2015-11-10 15:03 ` Gabriel Laskar 2015-10-15 5:55 ` [PATCH v4 03/79] drm.h: use __kernel_size_t instead of size_t Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 04/79] drm_mode.h: use __u32 and __u64 from linux/types.h Mikko Rapeli 2015-10-15 13:32 ` Alex Deucher 2015-10-15 13:32 ` Alex Deucher 2015-10-15 13:48 ` Mikko Rapeli 2015-10-15 13:48 ` Mikko Rapeli 2015-10-21 15:09 ` Emil Velikov 2015-10-21 15:09 ` Emil Velikov 2015-10-21 15:18 ` Alex Deucher 2015-10-21 15:18 ` Alex Deucher 2015-10-21 16:21 ` Emil Velikov 2015-10-21 16:21 ` Emil Velikov 2015-10-21 16:27 ` Alex Deucher 2015-10-21 16:27 ` Alex Deucher 2015-10-21 17:42 ` Emil Velikov 2015-10-21 17:42 ` Emil Velikov 2015-10-15 5:55 ` [PATCH v4 05/79] exynos_drm.h: use " Mikko Rapeli 2015-10-15 5:55 ` Mikko Rapeli 2015-10-15 5:55 ` Mikko Rapeli 2015-10-15 16:17 ` Gustavo Padovan 2015-10-15 16:17 ` Gustavo Padovan 2015-10-15 16:17 ` Gustavo Padovan 2015-10-15 5:55 ` [PATCH v4 06/79] nouveau_drm.h: use __u32 and " Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 07/79] radeon_drm.h: " Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 08/79] r128_drm.h: include drm/drm.h Mikko Rapeli 2015-10-15 7:43 ` Daniel Vetter 2015-10-15 7:43 ` Daniel Vetter 2015-10-15 5:55 ` [PATCH v4 09/79] via_drm.h: don't include non-existing via_drmclient.h Mikko Rapeli 2015-10-21 15:01 ` Emil Velikov 2015-10-21 15:01 ` Emil Velikov 2015-10-15 5:55 ` [PATCH v4 10/79] via_drm.h: move struct via_file_private definition to drivers/gpu/drm/via/via_drv.h Mikko Rapeli 2015-10-21 14:36 ` Emil Velikov 2015-10-21 14:36 ` Emil Velikov 2015-10-21 15:33 ` Daniel Vetter 2015-10-21 15:33 ` Daniel Vetter 2015-10-21 16:25 ` Emil Velikov 2015-10-21 16:25 ` Emil Velikov 2015-10-15 5:55 ` [PATCH v4 11/79] savage_drm.h: include <drm/drm.h> Mikko Rapeli 2015-10-15 5:55 ` Mikko Rapeli 2015-10-15 6:44 ` Daniel Vetter 2015-10-15 6:44 ` Daniel Vetter 2015-10-15 5:55 ` [PATCH v4 12/79] include/uapi/drm/sis_drm.h: move sis_file_private to drivers/gpu/drm/sis/sis_drv.h Mikko Rapeli 2015-10-21 14:39 ` Emil Velikov 2015-10-21 15:34 ` Daniel Vetter 2015-10-21 15:34 ` Daniel Vetter 2015-10-15 5:55 ` [PATCH v4 13/79] drm/i810_drm.h: include drm/drm.h Mikko Rapeli 2015-10-15 7:44 ` Daniel Vetter 2015-10-15 7:44 ` Daniel Vetter 2015-10-15 5:55 ` [PATCH v4 14/79] include/uapi/drm/vmwgfx_drm.h: use __s32, __u32 and __u64 from linux/types.h Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 15/79] include/uapi/drm/qxl_drm.h: " Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 16/79] include/uapi/linux/agpgart.h: include stdlib.h in userspace Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 17/79] include/uapi/sound/emu10k1.h: added EMU10K1 version of DECLARE_BITMAP macro Mikko Rapeli 2015-10-15 5:55 ` Mikko Rapeli 2015-10-15 8:04 ` Takashi Iwai 2015-10-15 8:04 ` Takashi Iwai 2015-10-15 5:55 ` [PATCH v4 18/79] dm-log-userspace.h: use __u32, __s32 and __u64 from linux/types.h Mikko Rapeli 2015-10-15 8:09 ` Mike Snitzer 2015-10-15 8:09 ` Mike Snitzer 2015-10-15 17:53 ` Mikko Rapeli 2015-10-15 17:53 ` Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 19/79] hsi_char.h: use __u32 " Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 20/79] include/uapi/linux/hsi/cs-protocol.h: include linux/time.h Mikko Rapeli 2015-10-15 5:55 ` [PATCH v4 21/79] ebtables.h: use __u64 from linux/types.h Mikko Rapeli 2015-10-15 5:55 ` Mikko Rapeli 2015-11-23 16:55 ` Pablo Neira Ayuso 2015-10-15 5:56 ` [PATCH v4 22/79] cld.h: use __u8, __u16, __s16, __u32 and __s64 " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 23/79] rds.h: " Mikko Rapeli 2015-10-15 11:06 ` Sowmini Varadhan 2015-10-15 11:06 ` Sowmini Varadhan 2015-10-15 22:00 ` Mikko Rapeli 2015-10-15 22:00 ` Mikko Rapeli 2015-10-15 22:21 ` Sowmini Varadhan 2015-10-15 22:39 ` Mikko Rapeli 2015-10-15 22:39 ` Mikko Rapeli 2015-10-15 23:03 ` Sowmini Varadhan 2015-10-15 23:03 ` Sowmini Varadhan 2015-10-15 5:56 ` [PATCH v4 24/79] sctp.h: use __u8 and __u32 " Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 25/79] scsi_bsg_fc.h: use __u8, __u32 and __u64 " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 26/79] scsi_netlink.h: use __u8, __u16 " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 27/79] scsi_netlink_fc.h: use __u16, __u32 " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 28/79] hdspm.h: use __u8, __u32 and __u64 from linux/types.h instead of stdint.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 8:04 ` Takashi Iwai 2015-10-15 8:04 ` Takashi Iwai 2015-10-15 5:56 ` [PATCH v4 29/79] gntalloc.h: use __u16, __u32 and __u64 from linux/types.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 10:55 ` David Vrabel 2015-10-15 10:55 ` [Xen-devel] " David Vrabel 2015-10-15 10:55 ` David Vrabel 2015-10-15 5:56 ` [PATCH v4 30/79] gntdev.h: use " Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 10:56 ` David Vrabel 2015-10-15 10:56 ` [Xen-devel] " David Vrabel 2015-10-15 10:56 ` David Vrabel 2015-10-15 5:56 ` [PATCH v4 31/79] include/uapi/linux/sysctl.h: use __kernel_size_t instead of size_t Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 32/79] include/uapi/asm-generic/ipcbuf.h: include linux/posix_types.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 33/79] include/uapi/asm-generic/msgbuf.h: include asm/ipcbuf.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 34/79] include/uapi/asm-generic/shmbuf.h: include fixes Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 35/79] asm-generic/sembuf.h: include asm/posix_types.h and asm/ipcbuf.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 36/79] include/uapi/asm-generic/signal.h: use __kernel_size_t instead of size_t Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 37/79] include/uapi/linux/socket.h: include sys/socket.h in userspace Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 38/79] include/uapi/linux/rds.h: include linux/socket.h and linux/types.h Mikko Rapeli 2015-10-15 11:10 ` Sowmini Varadhan 2015-10-15 11:10 ` Sowmini Varadhan 2015-10-15 5:56 ` [PATCH v4 39/79] include/uapi/linux/if_pppox.h: include linux/if.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 40/79] include/uapi/linux/if_tunnel.h: include linux/if.h, linux/ip.h and linux/in6.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 41/79] include/uapi/linux/ipv6_route.h: include linux/in6.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 42/79] " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 43/79] include/uapi/linux/if_pppol2tp.h: include linux/in.h and linux/in6.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 44/79] include/uapi/linux/if_pppox.h: " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 45/79] linux/if.h linux/hdlc/ioctl.h: move IFNAMSIZ definition to hdlc/ioctl.h Mikko Rapeli 2015-10-15 8:49 ` Frans Klaver 2015-10-15 8:49 ` Frans Klaver 2015-10-15 18:08 ` Mikko Rapeli 2015-10-15 18:08 ` Mikko Rapeli 2015-10-15 18:11 ` [PATCH] " Mikko Rapeli 2015-10-15 18:11 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 46/79] include/uapi/linux/packet_diag.h: include linux/netdevice.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 47/79] include/uapi/linux/llc.h: include linux/if.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 48/79] include/uapi/linux/mqueue.h: include linux/types.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 49/79] include/uapi/linux/mroute.h: include linux/in.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 50/79] include/uapi/linux/dlm_netlink.h: include linux/dlmconstants.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 51/79] include/uapi/linux/ip6_tunnel.h: include linux/if.h and linux/in6.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 52/79] include/uapi/netfilter/*.h: fix include files for compilation Mikko Rapeli 2015-11-23 16:55 ` Pablo Neira Ayuso 2015-10-15 5:56 ` [PATCH v4 53/79] include/uapi/linux/errqueue.h: include linux/time.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 54/79] include/uapi/asm-generic/ucontext.h: include asm/signal.h and asm/sigcontext.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 55/79] arch/x86/include/uapi/asm/signal.h: use __kernel_size_t instead of size_t Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 56/79] include/uapi/linux/auto_fs.h: include linux/limits.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 57/79] include/uapi/linux/openvswitch.h: use __u32 from linux/types.h Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 58/79] include/uapi/linux/target_core_user.h: use __u8, __u16, __u32 and __u64 " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 59/79] include/uapi/linux/omapfb.h: use __kernel_size_t instead of size_t Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 60/79] include/uapi/linux/atm_zatm.h: include linux/time.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 61/79] include/uapi/linux/scc.h: include linux/sockios.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 62/79] include/uapi/linux/btrfs.h: define NULL Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 63/79] include/uapi/linux/kexec.h: use __kernel_size_t instead of size_t Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 64/79] include/uapi/linux/reiserfs_xattr.h: " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 65/79] include/uapi/linux/patchkey.h: change #error to #warning if file included directly Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 66/79] include/uapi/linux/coda.h: use __kernel_pid_t and add u_short etc definitions for userspace Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 67/79] include/uapi/linux/android/binder.h: use __kernel_pid_t and __kernel_uid_t Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 68/79] arch/x86/include/uapi/asm/sembuf.h: include linux/types.h and linux/ipc.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 69/79] include/uapi/linux/dvb/video.h: remove stdint.h include Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 70/79] include/uapi/mtd/mtd-user.h: " Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 71/79] include/uapi/linux/fuse.h: use linux/types.h also in userspace Mikko Rapeli 2015-10-15 15:20 ` Miklos Szeredi 2015-10-15 15:20 ` Miklos Szeredi 2015-10-15 17:41 ` Mikko Rapeli 2015-10-15 17:41 ` Mikko Rapeli 2015-10-15 18:32 ` Miklos Szeredi 2015-10-15 18:32 ` Miklos Szeredi 2015-10-15 18:59 ` Arnd Bergmann 2015-10-15 18:59 ` Arnd Bergmann 2015-10-15 19:25 ` Miklos Szeredi 2015-10-15 21:03 ` Mikko Rapeli 2015-10-15 21:03 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 72/79] include/linux/ipmi-fru.h: use linux/types.h instead of stdint.h Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 73/79] include/linux/sdb.h: use linux/types.h types " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 74/79] include/linux/xz.h: " Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 75/79] include/uapi/xen/privcmd.h: fix compilation in userspace Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 10:07 ` kbuild test robot 2015-10-15 10:07 ` kbuild test robot 2015-10-15 10:07 ` kbuild test robot 2015-10-15 10:07 ` kbuild test robot 2015-10-15 10:29 ` David Vrabel 2015-10-15 10:29 ` David Vrabel 2015-10-15 10:29 ` David Vrabel 2015-10-15 11:18 ` Mikko Rapeli 2015-10-15 11:18 ` Mikko Rapeli [this message] 2015-10-15 11:18 ` Mikko Rapeli 2015-10-15 11:24 ` David Vrabel 2015-10-15 11:24 ` David Vrabel 2015-10-15 11:24 ` David Vrabel 2015-10-15 11:24 ` David Vrabel 2015-10-15 11:35 ` Mikko Rapeli 2015-10-15 11:35 ` Mikko Rapeli 2015-10-15 11:35 ` Mikko Rapeli 2015-10-15 11:35 ` Mikko Rapeli 2015-10-15 10:29 ` David Vrabel 2015-10-15 5:56 ` [PATCH v4 76/79] coda_psdev.h: move upc_req definition from uapi to kernel side headers Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 77/79] include/uapi/linux/elfcore.h: remove non-compiling userspace parts Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 78/79] include/uapi/linux/errqueue.h: include time.h in userspace Mikko Rapeli 2015-10-15 5:56 ` [PATCH v4 79/79] arch/arm/include/uapi/asm/signal.h: use __kernel_size_t instead of size_t Mikko Rapeli 2015-10-15 5:56 ` Mikko Rapeli
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