| Message ID | 1422877869-25265-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common index 6915d28cf118..85a70c14d70f 100644 --- a/arch/um/Kconfig.common +++ b/arch/um/Kconfig.common @@ -3,6 +3,7 @@ config UML default y select HAVE_ARCH_AUDITSYSCALL select HAVE_UID16 + select HAVE_FUTEX_CMPXCHG if FUTEX select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES select GENERIC_IO
This is a note to let you know that I have just added a patch titled um: Skip futex_atomic_cmpxchg_inatomic() test to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt6. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 2ae5571fd4ea42e8f72e0b7096014047783c2daa Mon Sep 17 00:00:00 2001 From: Richard Weinberger <richard@nod.at> Date: Wed, 10 Dec 2014 13:53:51 +0100 Subject: um: Skip futex_atomic_cmpxchg_inatomic() test commit f911d731054ab3d82ee72a16b889e17ca3a2332a upstream. 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: Miklos Szeredi <miklos@szeredi.hu> Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Richard Weinberger <richard@nod.at> Tested-by: Daniel Walter <d.walter@0x90.at> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- arch/um/Kconfig.common | 1 + 1 file changed, 1 insertion(+) -- 2.1.4