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Kernel: Ignore MADV_SET_NONVOLATILE if already non-volatile

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Just return 0 right away without changing any region flags.
This commit is contained in:
Andreas Kling 2019-12-18 20:48:58 +01:00
parent 487f9b373b
commit 72ec2fae6e
1 changed files with 2 additions and 0 deletions
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2
Kernel/Process.cpp
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@ -358,6 +358,8 @@ int Process::sys$madvise(void* address, size_t size, int advice)
if (!region->vmobject().is_purgeable()) if (!region->vmobject().is_purgeable())
return -EPERM; return -EPERM;
auto& vmobject = static_cast<PurgeableVMObject&>(region->vmobject()); auto& vmobject = static_cast<PurgeableVMObject&>(region->vmobject());
if (!vmobject.is_volatile())
return 0;
vmobject.set_volatile(false); vmobject.set_volatile(false);
bool was_purged = vmobject.was_purged(); bool was_purged = vmobject.was_purged();
vmobject.set_was_purged(false); vmobject.set_was_purged(false);