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authorHeiko Carstens <heiko.carstens@de.ibm.com>2013-09-09 07:44:43 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2013-09-09 08:57:32 +0200
commit9e75c6274a7365ad493fc3e75c8dd35f0185b7ca (patch)
tree4229e4b0f1295df570a5bad2de0af285753836b5 /arch/s390/oprofile
parent2ec7f4aec4d459ef443151ecc875bfbb3a2788f8 (diff)
downloadlinux-linaro-stable-9e75c6274a7365ad493fc3e75c8dd35f0185b7ca.tar.gz
s390/irq: reduce size of external interrupt handler hash array
Change the hash algorithm a bit so it produces only values in the range of 0..31. This allows to reduce the size of the external interrupt handler hash array even further while making sure that each of the known interrupt sources keeps its unique hash with the slightly modified algorithm: 0x1004 --> 12 0x1201 --> 10 0x1202 --> 11 0x1406 --> 16 0x1407 --> 17 0x2401 --> 19 0x2603 --> 22 0x4000 --> 0 This also means that the entire array now fits into exactly one cache line; so add a proper align statement as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
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