From: Thomas Schlichter the bk-acpi.patch leads to following warning: In file included from include/asm/fixmap.h:18, from arch/i386/kernel/time_hpet.c:17: include/asm/acpi.h: In function `__acpi_acquire_global_lock': include/asm/acpi.h:72: Warnung: implicit declaration of function `cmpxchg' The attached patch fixes it by including . --- 25-akpm/include/asm-i386/acpi.h | 2 ++ 1 files changed, 2 insertions(+) diff -puN include/asm-i386/acpi.h~bk-acpi-warning-fix include/asm-i386/acpi.h --- 25/include/asm-i386/acpi.h~bk-acpi-warning-fix Mon Mar 8 13:54:54 2004 +++ 25-akpm/include/asm-i386/acpi.h Mon Mar 8 13:54:54 2004 @@ -28,6 +28,8 @@ #ifdef __KERNEL__ +#include + #define COMPILER_DEPENDENT_INT64 long long #define COMPILER_DEPENDENT_UINT64 unsigned long long _