The patch titled um: disable CONFIG_CMPXCHG_LOCAL has been removed from the -mm tree. Its filename was um-disable-config_cmpxchg_local.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: um: disable CONFIG_CMPXCHG_LOCAL From: Richard Weinberger <richard@xxxxxx> Commit 8a5ec0ba "Lockless (and preemptless) fastpaths for slub" makes use of this_cpu_cmpxchg_double() which needs this_cpu_cmpxchg16b_emu() on x86_64. Implementing cmpxchg16b emulation for UML would introduce too much complexity. So just disable it. Signed-off-by: Richard Weinberger <richard@xxxxxx> Reported-by: Sergei Trofimovich <slyich@xxxxxxxxx> Acked-by: Pekka Enberg <penberg@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/um/Kconfig.x86 | 4 ++++ 1 file changed, 4 insertions(+) diff -puN arch/um/Kconfig.x86~um-disable-config_cmpxchg_local arch/um/Kconfig.x86 --- a/arch/um/Kconfig.x86~um-disable-config_cmpxchg_local +++ a/arch/um/Kconfig.x86 @@ -4,6 +4,10 @@ menu "UML-specific options" menu "Host processor type and features" +config CMPXCHG_LOCAL + bool + default n + source "arch/x86/Kconfig.cpu" endmenu _ Patches currently in -mm which might be from richard@xxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html