path: root/arch/s390/Makefile
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authorHeiko Carstens <heiko.carstens@de.ibm.com>2015-11-24 12:33:07 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-12-18 14:59:19 +0100
commit76cdd44c2e56ffabc297494c090c6babc8985998 (patch)
treeb737f0cbfa3fcbf1abf96d4e087f38194bddd8d1 /arch/s390/Makefile
parents390/facilities: use stfl mnemonic instead of insn magic (diff)
s390/facilities: always use lowcore's stfle field for storing facility bits
head.s contains an stfle instruction which stores it result at the storage location that is assigned to the stfl instruction. This is currently no problem, since we only care about one double word. However if the number of double words in the ALS bitfield grows the current code is not very stable. E.g. before issuing the stfle command the memory to which it stores must be cleared, since the instruction may or may not clear memory contents where no bits are set. In order to simplify the code a bit always use the storage location that we reserved for the stfle result. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Makefile')
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