Hi Jan,
I found where my problem comes from, it is a strange alignment in the
tdma_config structure.
In user mode the offsets in the struct are :
id : 16
offset :
20
period :
28
phasing :
32
size : 36
In kernel mode the offsets are :
id : 16
offset :
24
period :
32
phasing :
36
size : 40
All the field lengths are multiple of 4 bytes, and should not have alignment
problems...
Anyway, changing the struct to :
struct {
__s32 id;
__u64 offset;
__u32 period;
__u32 phasing;
__u32 size;
__s32 joint_slot;
__u32 cal_timeout;
__u64 *cal_results;
} __attribute__((packed)) set_slot;
or moving id to the end solves the problem. Any idea ?
Regards,
WALLOIS Cyril
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