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f4329f2ecb
Exception handlers are aligned to 128 bytes (L1 cache) on 64s, which is overkill. It can reduce the icache footprint of any individual exception path. However taken as a whole, the expansion in icache footprint seems likely to be counter-productive and cause more total misses. Create IFETCH_ALIGN_SHIFT/BYTES, which should give optimal ifetch alignment with much more reasonable alignment. This saves 1792 bytes from head_64.o text with an allmodconfig build. Other subarchitectures should define appropriate IFETCH_ALIGN_SHIFT values if this becomes more widely used. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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| crypto | ||
| include | ||
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| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| perf | ||
| platforms | ||
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| sysdev | ||
| xmon | ||
| Kconfig | ||
| Kconfig.debug | ||
| Makefile | ||
| relocs_check.sh | ||