[riot-notifications] [RIOT-OS/RIOT] cpu/arm7_common: Make irq_*() compiler barriers (#11440)

Kaspar Schleiser notifications at github.com
Fri May 24 11:04:11 CEST 2019

> -mserialize-volatile

Didn't know about that, thanks for the hint!
It seems it is default anyways: (from "man gcc")
           When this option is enabled, GCC inserts "MEMW" instructions before "volatile" memory references to guarantee sequential
           consistency.  The default is -mserialize-volatile.  Use -mno-serialize-volatile to omit the "MEMW" instructions.

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