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由 Richard Weinberger 提交于
futex_atomic_cmpxchg_inatomic() does not work on UML because it triggers a copy_from_user() in kernel context. On UML copy_from_user() can only be used if the kernel was called by a real user space process such that UML can use ptrace() to fetch the value. Reported-by: NMiklos Szeredi <miklos@szeredi.hu> Suggested-by: NGeert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: NRichard Weinberger <richard@nod.at> Tested-by: NDaniel Walter <d.walter@0x90.at>
f911d731