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(parent: 12325f0) | patch
s390/bpf,jit: fix prolog oddity
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Fri, 4 Oct 2013 09:12:16 +0000 (11:12 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 24 Oct 2013 15:16:59 +0000 (17:16 +0200)
commit6cef30034c32ebe448c844089c4168c411feeb63
tree618a8ed3f69e1c3298d0c50342782e2c7f0387fatree | snapshot (tar.gz zip)
parent12325f097898c120c6cd89797aae97836783b5efcommit | diff
s390/bpf,jit: fix prolog oddity

The prolog of functions generated by the bpf jit compiler uses an
instruction sequence with an "ahi" instruction to create stack space
instead of using an "aghi" instruction. Using the 32-bit "ahi" is not
wrong as the stack we are operating on is an order-4 allocation which
is always aligned to 16KB. But it is more consistent to use an "aghi"
as the stack pointer is a 64-bit value.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/net/bpf_jit_comp.c diff | blob | blame | history