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SubjectRe: [ACPI] Re: Linux 2.4.26-rc1 (cmpxchg vs 80386 build)
From
Date
Okay, simplicity wins;-)

Build for 80386 -- get a build-time warning -- that should do.

thanks,
-Len

ps. earliest ACPI implementation is said to in the late Pentium (1) era.


===== arch/i386/kernel/acpi/boot.c 1.56 vs edited =====
--- 1.56/arch/i386/kernel/acpi/boot.c Fri Mar 26 17:50:48 2004
+++ edited/arch/i386/kernel/acpi/boot.c Tue Mar 30 16:23:39 2004
@@ -67,6 +67,10 @@
static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
#endif

+#ifndef __HAVE_ARCH_CMPXCHG
+#warning ACPI uses CMPXCHG, i486 and later hardware
+#endif
+
/*
--------------------------------------------------------------------------
Boot-time Configuration
-------------------------------------------------------------------------- */
===== include/asm-i386/system.h 1.30 vs edited =====
--- 1.30/include/asm-i386/system.h Fri Nov 21 01:24:00 2003
+++ edited/include/asm-i386/system.h Tue Mar 30 16:05:30 2004
@@ -241,6 +241,7 @@

#ifdef CONFIG_X86_CMPXCHG
#define __HAVE_ARCH_CMPXCHG 1
+#endif

static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long
old,
unsigned long new, int size)
@@ -273,10 +274,6 @@
((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),\
(unsigned long)(n),sizeof(*(ptr))))

-#else
-/* Compiling for a 386 proper. Is it worth implementing via cli/sti?
*/
-#endif
-
#ifdef __KERNEL__
struct alt_instr {
__u8 *instr; /* original instruction */


-
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