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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-02-08 17:27:21 +0300
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-02-10 06:39:08 +0300
commit5b11abfdb572bf9284e596dd198ac2aaf95b6616 (patch)
tree1d7852201544d29c6757cd27f131bb31d29d74ed /arch/powerpc/include/asm/elf.h
parentd87bf76679bd37593ae4a3133f5da9395a4963ac (diff)
downloadlinux-5b11abfdb572bf9284e596dd198ac2aaf95b6616.tar.xz
powerpc/pci: mmap anonymous memory when legacy_mem doesn't exist
The new legacy_mem file in sysfs is causing problems with X on machines that don't support legacy memory access. The way I initially implemented it, we would fail with -ENXIO when trying to mmap it, thus exposing to X that we do support the API but there is no legacy memory. Unfortunately, X poor error handling is causing it to fail to start when it gets this error. This implements a workaround hack that instead maps anonymous memory instead (using shmem if VM_SHARED is set, just like /dev/zero does). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/elf.h')
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