[PATCH] mmio-debug

From: J . A . Magallon (jamagallon@able.es)
Date: Thu Feb 22 2001 - 20:32:50 EST

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Hi,

This is a patch that makes the __io_virt_debug use conditional. It is mainly
the patch submitted by Jeff Garzik but without the extra configs and a short
text in Configure.help.
(plz check help for my english...)

============= patch-mmio-debug

diff -ruN linux-2.4.2-ac1/Documentation/Configure.help
linux-2.4.2-ac1-mmio/Documentation/Configure.help
--- linux-2.4.2-ac1/Documentation/Configure.help Thu Feb 22 23:35:34 2001
+++ linux-2.4.2-ac1-mmio/Documentation/Configure.help Fri Feb 23 01:57:52
2001
@@ -15032,6 +15032,14 @@
   better 32 MB RAM to avoid excessive linking time. This is only
   useful for kernel hackers. If unsure, say N.

+Memory mapped I/O debug support
+CONFIG_DEBUG_IOVIRT
+ If you say Y here, all the memory mapped input and output on
+ devices will go through a check to catch access to unmapped
+ ISA addresses, that can still be used by old drivers.
+ If you say N, I/O will be faster and kernel will be a bit smaller,
+ but no check will be done.
+
Magic System Request Key support
CONFIG_MAGIC_SYSRQ
   If you say Y here, you will have some control over the system even
diff -ruN linux-2.4.2-ac1/arch/i386/config.in
linux-2.4.2-ac1-mmio/arch/i386/config.in
--- linux-2.4.2-ac1/arch/i386/config.in Thu Feb 22 23:35:34 2001
+++ linux-2.4.2-ac1-mmio/arch/i386/config.in Fri Feb 23 00:58:52 2001
@@ -370,5 +370,6 @@
comment 'Kernel hacking'

#bool 'Debug kmalloc/kfree' CONFIG_DEBUG_MALLOC
+bool 'Memory mapped I/O debugging' CONFIG_DEBUG_IOVIRT
bool 'Magic SysRq key' CONFIG_MAGIC_SYSRQ
endmenu
diff -ruN linux-2.4.2-ac1/arch/i386/defconfig
linux-2.4.2-ac1-mmio/arch/i386/defconfig
--- linux-2.4.2-ac1/arch/i386/defconfig Thu Feb 22 11:29:09 2001
+++ linux-2.4.2-ac1-mmio/arch/i386/defconfig Fri Feb 23 00:49:32 2001
@@ -721,4 +721,5 @@
#
# Kernel hacking
#
+CONFIG_DEBUG_IOVIRT=y
# CONFIG_MAGIC_SYSRQ is not set
diff -ruN linux-2.4.2-ac1/arch/i386/kernel/i386_ksyms.c
linux-2.4.2-ac1-mmio/arch/i386/kernel/i386_ksyms.c
--- linux-2.4.2-ac1/arch/i386/kernel/i386_ksyms.c Thu Feb 22 23:35:34
2001
+++ linux-2.4.2-ac1-mmio/arch/i386/kernel/i386_ksyms.c Fri Feb 23
01:02:44 2001
@@ -60,7 +60,9 @@
EXPORT_SYMBOL(dump_extended_fpu);
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(iounmap);
+#ifdef CONFIG_DEBUG_IOVIRT
EXPORT_SYMBOL(__io_virt_debug);
+#endif
EXPORT_SYMBOL(enable_irq);
EXPORT_SYMBOL(disable_irq);
EXPORT_SYMBOL(disable_irq_nosync);
diff -ruN linux-2.4.2-ac1/arch/i386/lib/Makefile
linux-2.4.2-ac1-mmio/arch/i386/lib/Makefile
--- linux-2.4.2-ac1/arch/i386/lib/Makefile Thu Feb 22 23:35:34 2001
+++ linux-2.4.2-ac1-mmio/arch/i386/lib/Makefile Fri Feb 23 01:03:43 2001
@@ -8,10 +8,11 @@
L_TARGET = lib.a

obj-y = checksum.o old-checksum.o delay.o \
- usercopy.o getuser.o putuser.o iodebug.o \
+ usercopy.o getuser.o putuser.o \
         memcpy.o strstr.o

obj-$(CONFIG_X86_USE_3DNOW) += mmx.o
obj-$(CONFIG_HAVE_DEC_LOCK) += dec_and_lock.o
+obj-$(CONFIG_DEBUG_IOVIRT) += iodebug.o

include $(TOPDIR)/Rules.make
diff -ruN linux-2.4.2-ac1/include/asm-i386/io.h
linux-2.4.2-ac1-mmio/include/asm-i386/io.h
--- linux-2.4.2-ac1/include/asm-i386/io.h Tue Jan 30 00:48:52 2001
+++ linux-2.4.2-ac1-mmio/include/asm-i386/io.h Fri Feb 23 02:12:31 2001
@@ -1,6 +1,8 @@
#ifndef _ASM_IO_H
#define _ASM_IO_H

+#include <linux/config.h>
+
/*
  * This file contains the definitions for the x86 IO instructions
  * inb/inw/inl/outb/outw/outl and the "string versions" of the same
@@ -111,7 +113,7 @@
  * Temporary debugging check to catch old code using
  * unmapped ISA addresses. Will be removed in 2.4.
  */
-#if 1
+#if CONFIG_DEBUG_IOVIRT
   extern void *__io_virt_debug(unsigned long x, const char *file, int line);
   extern unsigned long __io_phys_debug(unsigned long x, const char *file, int
line);
   #define __io_virt(x) __io_virt_debug((unsigned long)(x), __FILE__, __LINE__)

-- J.A. Magallon $> cd pub mailto:jamagallon@able.es $> more beer

Linux werewolf 2.4.2 #1 SMP Thu Feb 22 11:40:37 CET 2001 i686

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