From: Jeff Dike avoid-overflows-in-kernel-timec.patch makes CONFIG_HZ necessary for a successful build. UML lacks a definition, so this patch adds one. It also changes the hard-wired definition of HZ to CONFIG_HZ. Note: this patch is a good idea even in the absence of hpa's time fixes. Cc: "H. Peter Anvin" Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton --- arch/um/Kconfig | 4 ++++ include/asm-um/param.h | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) diff -puN arch/um/Kconfig~uml-add-back-config_hz arch/um/Kconfig --- a/arch/um/Kconfig~uml-add-back-config_hz +++ a/arch/um/Kconfig @@ -68,6 +68,10 @@ config IRQ_RELEASE_METHOD bool default y +config HZ + int + default 100 + menu "UML-specific options" config STATIC_LINK diff -puN include/asm-um/param.h~uml-add-back-config_hz include/asm-um/param.h --- a/include/asm-um/param.h~uml-add-back-config_hz +++ a/include/asm-um/param.h @@ -10,7 +10,7 @@ #define MAXHOSTNAMELEN 64 /* max length of hostname */ #ifdef __KERNEL__ -#define HZ 100 +#define HZ CONFIG_HZ #define USER_HZ 100 /* .. some user interfaces are in "ticks" */ #define CLOCKS_PER_SEC (USER_HZ) /* frequency at which times() counts */ #endif _