forked from luck/tmp_suning_uos_patched
e7f8567db9
Allocate space from the top of a region first, then work downward,
if an architecture desires this.
When we allocate space from a resource, we look for gaps between children
of the resource. Previously, we always looked at gaps from the bottom up.
For example, given this:
[mem 0xbff00000-0xf7ffffff] PCI Bus 0000:00
[mem 0xbff00000-0xbfffffff] gap -- available
[mem 0xc0000000-0xdfffffff] PCI Bus 0000:02
[mem 0xe0000000-0xf7ffffff] gap -- available
we attempted to allocate from the [mem 0xbff00000-0xbfffffff] gap first,
then the [mem 0xe0000000-0xf7ffffff] gap.
With this patch an architecture can choose to allocate from the top gap
[mem 0xe0000000-0xf7ffffff] first.
We can't do this across the board because iomem_resource.end is initialized
to 0xffffffff_ffffffff on 64-bit architectures, and most machines can't
address the entire 64-bit physical address space. Therefore, we only
allocate top-down if the arch requests it by clearing
"resource_alloc_from_bottom".
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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| debug | ||
| gcov | ||
| irq | ||
| power | ||
| time | ||
| trace | ||
| .gitignore | ||
| acct.c | ||
| async.c | ||
| audit_tree.c | ||
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| audit.c | ||
| audit.h | ||
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| cgroup_freezer.c | ||
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| cpu.c | ||
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| cred.c | ||
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| extable.c | ||
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| Kconfig.freezer | ||
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| Kconfig.locks | ||
| Kconfig.preempt | ||
| kexec.c | ||
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| kmod.c | ||
| kprobes.c | ||
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| lockdep_internals.h | ||
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| lockdep.c | ||
| Makefile | ||
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| mutex-debug.c | ||
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| mutex.c | ||
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| perf_event.c | ||
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| rcutree.h | ||
| relay.c | ||
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| resource.c | ||
| rtmutex_common.h | ||
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| rtmutex-debug.h | ||
| rtmutex-tester.c | ||
| rtmutex.c | ||
| rtmutex.h | ||
| rwsem.c | ||
| sched_clock.c | ||
| sched_cpupri.c | ||
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| sched_debug.c | ||
| sched_fair.c | ||
| sched_features.h | ||
| sched_idletask.c | ||
| sched_rt.c | ||
| sched_stats.h | ||
| sched.c | ||
| seccomp.c | ||
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| signal.c | ||
| smp.c | ||
| softirq.c | ||
| spinlock.c | ||
| srcu.c | ||
| stacktrace.c | ||
| stop_machine.c | ||
| sys_ni.c | ||
| sys.c | ||
| sysctl_binary.c | ||
| sysctl_check.c | ||
| sysctl.c | ||
| taskstats.c | ||
| test_kprobes.c | ||
| time.c | ||
| timeconst.pl | ||
| timer.c | ||
| tracepoint.c | ||
| tsacct.c | ||
| uid16.c | ||
| up.c | ||
| user_namespace.c | ||
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| user.c | ||
| utsname_sysctl.c | ||
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| wait.c | ||
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| workqueue_sched.h | ||
| workqueue.c | ||