path: root/init/main.c
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authorH. Peter Anvin <hpa@linux.intel.com>2010-07-21 14:23:10 -0700
committerH. Peter Anvin <hpa@linux.intel.com>2010-07-21 15:33:54 -0700
commit1cff92d8fdb27684308864d9cdb324bee43b40ab (patch)
tree65a6060dab843f5f2e32a8e0fce0200eeb9d44ef /init/main.c
parentx86, xsave: Add __init attribute to setup_xstate_features() (diff)
x86, xsave: Make xstate_enable_boot_cpu() __init, protect on CPU 0
xstate_enable_boot_cpu() is, as the name implies, only used on the boot CPU; furthermore, it invokes alloc_bootmem(), which is __init; hence it needs to be tagged __init rather than __cpuinit. Furthermore, it is *not* safe in the long run to rely on CPU 0 only coming online during the early boot -- at some point we're going to support offlining (and re-onlining) the boot CPU, and at that point we must not call xstate_enable_boot_cpu() again. The code is a fair bit more obscure than one would like, because the __ref overrides aren't quite powerful enough. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Robert Richter <robert.richter@amd.com> LKML-Reference: <4C476236.1020302@zytor.com>
Diffstat (limited to 'init/main.c')
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