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cxl: Use fixed width predefined types in data structure. 

This patch fixes a regression introduced by commit b810253bd9 ("cxl:
Add mechanism for delivering AFU driver specific events").

It changes the type u8 to __u8 in the uapi header cxl.h, because the
former is a kernel internal type, and may not be defined in userland
build environments, in particular when cross-compiling libcxl on x86_64
linux machines (RHEL6.7 and Ubuntu 16.04).

This patch also changes the size of the field data_size, and makes it
constant, to support 32-bit userland applications running on big-endian
ppc64 kernels transparently.

mpe: This is an ABI change, however the ABI was only added during the
4.8 merge window so has never been part of a released kernel - therefore
we give ourselves permission to change it.

Fixes: b810253bd9 ("cxl: Add mechanism for delivering AFU driver specific events")
Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Philippe Bergheaud 2016-08-05 14:02:00 +02:00 committed by Michael Ellerman
parent 546c4402c5
commit cbd74e1bc8
1 changed files with 2 additions and 2 deletions
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4
include/uapi/misc/cxl.h
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@ -136,8 +136,8 @@ struct cxl_event_afu_driver_reserved {
*
* Of course the contents will be ABI, but that's up the AFU driver.
*/
size_t data_size;
u8 data[];
__u32 data_size;
__u8 data[];
};
struct cxl_event {