xenctrl.h defines struct e820entry as:
if defined(__i386__) || defined(__x86_64__)
...
#define E820_RAM 1
...
struct e820entry {
uint64_t addr;
uint64_t size;
uint32_t type;
} __attribute__((packed));
...
#endif
$ dpkg-query -S /usr/include/xenctrl.h
libxen-dev:amd64: /usr/include/xenctrl.h
$ dpkg-query -W libxen-dev:amd64
libxen-dev:amd64 4.8.5+shim4.10.2+xsa282-1+deb9u11
./include/x86/x86-linux.h defines struct e820entry as:
#ifndef E820_RAM
struct e820entry {
uint64_t addr; /* start of memory segment */
uint64_t size; /* size of memory segment */
uint32_t type; /* type of memory segment */
#define E820_RAM 1
...
} __attribute__((packed));
#endif
Since cedeee0a3007 ("x86: Introduce helpers for getting RSDP address")
./kexec/arch/i386/kexec-x86-common.c includes
+#include "x86-linux-setup.h"
#include "../../kexec-xen.h"
When xenctrl.h is present the above results in:
$ gcc
...
In file included from kexec/arch/i386/../../kexec-xen.h:5:0,
from kexec/arch/i386/kexec-x86-common.c:43:
/usr/include/xenctrl.h:1271:8: error: redefinition of 'struct e820entry'
struct e820entry {
^~~~~~~~~
In file included from kexec/arch/i386/x86-linux-setup.h:3:0,
from kexec/arch/i386/kexec-x86-common.c:42:
./include/x86/x86-linux.h:16:8: note: originally defined here
struct e820entry {
^~~~~~~~~
...
$ gcc --version | head -1
gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
To militate this this problem re-order the includes so that
x86-linux.h is included after xenctrl.h and thus
struct e820entry will only be defined once due to it
being devined conditionally in x86-linux.h.
In practice the definitions are the same so it should
not matter which is chosen.
It also seems rather unpleasent to me to need to play
with include ordering. Perhaps a better solution in the longer
term would be to rename the local definition of struct e820entry.
Fixes: cedeee0a3007 ("x86: Introduce helpers for getting RSDP address")
Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
kexec/arch/i386/kexec-x86-common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kexec/arch/i386/kexec-x86-common.c b/kexec/arch/i386/kexec-x86-common.c
index 5c55ec8a2cd3..61ea19380ab2 100644
--- a/kexec/arch/i386/kexec-x86-common.c
+++ b/kexec/arch/i386/kexec-x86-common.c
@@ -38,9 +38,9 @@
#include "../../kexec-syscall.h"
#include "../../firmware_memmap.h"
#include "../../crashdump.h"
+#include "../../kexec-xen.h"
#include "kexec-x86.h"
#include "x86-linux-setup.h"
-#include "../../kexec-xen.h"
/* Used below but not present in (older?) xenctrl.h */
#ifndef E820_PMEM
--
2.11.0
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