And while retrying a compilation, I noticed this :
WARNING: "memcpy" [sound/core/snd-rawmidi.ko] has no CRC! WARNING: "__aeabi_uidiv" [sound/core/snd-pcm-dmaengine.ko] has no CRC! WARNING: "_set_bit" [sound/core/snd-pcm-dmaengine.ko] has no CRC! WARNING: "__get_user_4" [sound/core/snd-hwdep.ko] has no CRC! WARNING: "arm_copy_from_user" [sound/core/snd-hwdep.ko] has no CRC! WARNING: "arm_copy_to_user" [sound/core/snd-hwdep.ko] has no CRC! WARNING: "__memzero" [sound/core/snd-hwdep.ko] has no CRC! WARNING: "__put_user_4" [sound/core/snd-hwdep.ko] has no CRC! WARNING: "__aeabi_uidiv" [sound/core/snd-hrtimer.ko] has no CRC! WARNING: "__aeabi_uidivmod" [sound/core/seq/snd-seq.ko] has no CRC! WARNING: "_test_and_clear_bit" [sound/core/seq/snd-seq.ko] has no CRC! WARNING: "arm_copy_from_user" [sound/core/seq/snd-seq.ko] has no CRC! WARNING: "arm_copy_to_user" [sound/core/seq/snd-seq.ko] has no CRC! WARNING: "__aeabi_uidiv" [sound/core/seq/snd-seq.ko] has no CRC!
Compiling an older kernel is ok.