diff -rupN linux-2.4.32/Makefile linux-2.4.32.gcc4-fixes-v12/Makefile
--- linux-2.4.32/Makefile	2005-11-17 13:27:30.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/Makefile	2005-11-17 13:32:13.000000000 +0100
@@ -93,11 +93,17 @@ CPPFLAGS := -D__KERNEL__ -I$(HPATH)
 
 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
 	  -fno-strict-aliasing -fno-common
+CFLAGS += -fno-builtin-sprintf
 ifndef CONFIG_FRAME_POINTER
 CFLAGS += -fomit-frame-pointer
 endif
 AFLAGS := -D__ASSEMBLY__ $(CPPFLAGS)
 
+check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
+
+# disable pointer signedness warnings in gcc 4.0
+CFLAGS += $(call check_gcc,-Wno-pointer-sign,)
+
 #
 # ROOT_DEV specifies the default root-device when making the image.
 # This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case
diff -rupN linux-2.4.32/arch/i386/Makefile linux-2.4.32.gcc4-fixes-v12/arch/i386/Makefile
--- linux-2.4.32/arch/i386/Makefile	2004-11-17 18:36:41.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/arch/i386/Makefile	2005-11-17 13:32:13.000000000 +0100
@@ -23,8 +23,6 @@ LINKFLAGS =-T $(TOPDIR)/arch/i386/vmlinu
 
 CFLAGS += -pipe
 
-check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
-
 # prevent gcc from keeping the stack 16 byte aligned
 CFLAGS += $(call check_gcc,-mpreferred-stack-boundary=2,)
 
diff -rupN linux-2.4.32/arch/mips/Makefile linux-2.4.32.gcc4-fixes-v12/arch/mips/Makefile
--- linux-2.4.32/arch/mips/Makefile	2005-01-19 18:00:52.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/arch/mips/Makefile	2005-11-17 13:32:13.000000000 +0100
@@ -30,8 +30,6 @@ endif
 
 MAKEBOOT = $(MAKE) -C arch/$(ARCH)/boot
 
-check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
-
 #
 #
 # GCC uses -G 0 -mabicalls -fpic as default.  We don't want PIC in the kernel
diff -rupN linux-2.4.32/arch/mips64/Makefile linux-2.4.32.gcc4-fixes-v12/arch/mips64/Makefile
--- linux-2.4.32/arch/mips64/Makefile	2005-01-19 18:00:52.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/arch/mips64/Makefile	2005-11-17 13:32:13.000000000 +0100
@@ -26,7 +26,6 @@ ifdef CONFIG_CROSSCOMPILE
 CROSS_COMPILE	= $(tool-prefix)
 endif
 
-check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
 check_gas = $(shell if $(CC) $(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi)
 
 #
diff -rupN linux-2.4.32/arch/ppc/kernel/open_pic_defs.h linux-2.4.32.gcc4-fixes-v12/arch/ppc/kernel/open_pic_defs.h
--- linux-2.4.32/arch/ppc/kernel/open_pic_defs.h	2003-06-14 13:30:19.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/arch/ppc/kernel/open_pic_defs.h	2005-11-17 13:32:13.000000000 +0100
@@ -172,9 +172,6 @@ struct OpenPIC {
     OpenPIC_Processor Processor[OPENPIC_MAX_PROCESSORS];
 };
 
-extern volatile struct OpenPIC *OpenPIC;
-
-
     /*
      *  Current Task Priority Register
      */
diff -rupN linux-2.4.32/arch/x86_64/Makefile linux-2.4.32.gcc4-fixes-v12/arch/x86_64/Makefile
--- linux-2.4.32/arch/x86_64/Makefile	2004-04-14 20:22:20.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/arch/x86_64/Makefile	2005-11-17 13:32:13.000000000 +0100
@@ -38,8 +38,6 @@ OBJCOPY=$(CROSS_COMPILE)objcopy -O binar
 LDFLAGS=-e stext
 LINKFLAGS =-T $(TOPDIR)/arch/x86_64/vmlinux.lds $(LDFLAGS)
 
-check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1 ; then echo "$(1)"; else echo "$(2)"; fi)
-
 CFLAGS += -mno-red-zone
 CFLAGS += -mcmodel=kernel
 CFLAGS += -pipe
diff -rupN linux-2.4.32/arch/x86_64/ia32/ia32entry.S linux-2.4.32.gcc4-fixes-v12/arch/x86_64/ia32/ia32entry.S
--- linux-2.4.32/arch/x86_64/ia32/ia32entry.S	2005-01-19 18:00:53.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/arch/x86_64/ia32/ia32entry.S	2005-11-17 13:32:13.000000000 +0100
@@ -113,9 +113,18 @@ quiet_ni_syscall:
 	PTREGSCALL stub32_fork, sys32_fork
 	PTREGSCALL stub32_clone, sys32_clone
 	PTREGSCALL stub32_vfork, sys32_vfork
-	PTREGSCALL stub32_iopl, sys_iopl
 	PTREGSCALL stub32_rt_sigsuspend, sys_rt_sigsuspend
 
+	.macro PTREGSCALL3 label, func, arg
+	.globl \label
+\label:
+	leaq \func(%rip),%rax
+	leaq -ARGOFFSET+8(%rsp),\arg	/* 8 for return address */
+	jmp  ia32_ptregs_common	
+	.endm
+
+	PTREGSCALL3 stub32_iopl, sys_iopl, %rsi
+
 ENTRY(ia32_ptregs_common)
 	popq %r11
 	SAVE_REST
diff -rupN linux-2.4.32/arch/x86_64/kernel/entry.S linux-2.4.32.gcc4-fixes-v12/arch/x86_64/kernel/entry.S
--- linux-2.4.32/arch/x86_64/kernel/entry.S	2003-11-29 00:28:11.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/arch/x86_64/kernel/entry.S	2005-11-17 13:32:13.000000000 +0100
@@ -249,7 +249,16 @@ intret_signal_test:		
 	PTREGSCALL stub_vfork, sys_vfork
 	PTREGSCALL stub_rt_sigsuspend, sys_rt_sigsuspend
 	PTREGSCALL stub_sigaltstack, sys_sigaltstack
-	PTREGSCALL stub_iopl, sys_iopl
+
+	.macro PTREGSCALL3 label,func,arg
+	.globl \label
+\label:
+	leaq	\func(%rip),%rax
+	leaq    -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
+	jmp	ptregscall_common
+	.endm
+
+	PTREGSCALL3 stub_iopl, sys_iopl, %rsi
 
 ENTRY(ptregscall_common)
 	popq %r11
diff -rupN linux-2.4.32/arch/x86_64/kernel/ioport.c linux-2.4.32.gcc4-fixes-v12/arch/x86_64/kernel/ioport.c
--- linux-2.4.32/arch/x86_64/kernel/ioport.c	2003-11-29 00:28:11.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/arch/x86_64/kernel/ioport.c	2005-11-17 13:32:13.000000000 +0100
@@ -81,9 +81,9 @@ asmlinkage long sys_ioperm(unsigned long
  * code.
  */
 
-asmlinkage long sys_iopl(unsigned int level, struct pt_regs regs)
+asmlinkage long sys_iopl(unsigned int level, struct pt_regs *regs)
 {
-	unsigned int old = (regs.eflags >> 12) & 3;
+	unsigned int old = (regs->eflags >> 12) & 3;
 
 	if (level > 3)
 		return -EINVAL;
@@ -92,6 +92,6 @@ asmlinkage long sys_iopl(unsigned int le
 		if (!capable(CAP_SYS_RAWIO))
 			return -EPERM;
 	}
-	regs.eflags = (regs.eflags & 0xffffffffffffcfff) | (level << 12);
+	regs->eflags = (regs->eflags &~ 0x3000UL) | (level << 12);
 	return 0;
 }
diff -rupN linux-2.4.32/drivers/acpi/bus.c linux-2.4.32.gcc4-fixes-v12/drivers/acpi/bus.c
--- linux-2.4.32/drivers/acpi/bus.c	2005-01-19 18:00:53.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/drivers/acpi/bus.c	2005-11-17 13:32:13.000000000 +0100
@@ -623,7 +623,7 @@ acpi_bus_generate_event (
 	int			data)
 {
 	struct acpi_bus_event	*event = NULL;
-	u32			flags = 0;
+	unsigned long		flags = 0;
 
 	ACPI_FUNCTION_TRACE("acpi_bus_generate_event");
 
@@ -656,7 +656,7 @@ int
 acpi_bus_receive_event (
 	struct acpi_bus_event	*event)
 {
-	u32			flags = 0;
+	unsigned long		flags = 0;
 	struct acpi_bus_event	*entry = NULL;
 
 	DECLARE_WAITQUEUE(wait, current);
diff -rupN linux-2.4.32/drivers/sound/sound_firmware.c linux-2.4.32.gcc4-fixes-v12/drivers/sound/sound_firmware.c
--- linux-2.4.32/drivers/sound/sound_firmware.c	2001-02-22 15:23:46.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/drivers/sound/sound_firmware.c	2005-11-17 13:32:13.000000000 +0100
@@ -4,10 +4,11 @@
 #include <linux/fs.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
-#include <linux/unistd.h>
+static int my_errno;
+#define errno my_errno
+#include <asm/unistd.h>
 #include <asm/uaccess.h>
 
-static int errno;
 static int do_mod_firmware_load(const char *fn, char **fp)
 {
 	int fd;
diff -rupN linux-2.4.32/drivers/usb/host/ehci-q.c linux-2.4.32.gcc4-fixes-v12/drivers/usb/host/ehci-q.c
--- linux-2.4.32/drivers/usb/host/ehci-q.c	2005-01-19 18:00:53.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/drivers/usb/host/ehci-q.c	2005-11-17 13:32:13.000000000 +0100
@@ -199,8 +199,6 @@ ehci_urb_done (struct ehci_hcd *ehci, st
 #ifdef	INTR_AUTOMAGIC
 	struct urb		*resubmit = 0;
 	struct usb_device	*dev = 0;
-
-	static int ehci_urb_enqueue (struct usb_hcd *, struct urb *, int);
 #endif
 
 	if (likely (urb->hcpriv != 0)) {
diff -rupN linux-2.4.32/drivers/usb/inode.c linux-2.4.32.gcc4-fixes-v12/drivers/usb/inode.c
--- linux-2.4.32/drivers/usb/inode.c	2004-02-18 15:16:23.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/drivers/usb/inode.c	2005-11-17 13:32:13.000000000 +0100
@@ -41,6 +41,9 @@
 #include <linux/usbdevice_fs.h>
 #include <asm/uaccess.h>
 
+static struct inode_operations usbdevfs_bus_inode_operations;
+static struct file_operations usbdevfs_bus_file_operations;
+
 /* --------------------------------------------------------------------- */
 
 /*
diff -rupN linux-2.4.32/fs/hfs/trans.c linux-2.4.32.gcc4-fixes-v12/fs/hfs/trans.c
--- linux-2.4.32/fs/hfs/trans.c	2001-02-22 15:23:47.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/fs/hfs/trans.c	2005-11-17 13:32:13.000000000 +0100
@@ -33,6 +33,7 @@
 #include <linux/hfs_fs_sb.h>
 #include <linux/hfs_fs_i.h>
 #include <linux/hfs_fs.h>
+#include <linux/compiler.h>
 
 /*================ File-local variables ================*/
 
@@ -78,7 +79,7 @@ static unsigned char mac2latin_map[128] 
  *
  * Given a hexadecimal digit in ASCII, return the integer representation.
  */
-static inline const unsigned char dehex(char c) {
+static inline __attribute_const__ unsigned char dehex(char c) {
 	if ((c>='0')&&(c<='9')) {
 		return c-'0';
 	}
diff -rupN linux-2.4.32/include/asm-i386/byteorder.h linux-2.4.32.gcc4-fixes-v12/include/asm-i386/byteorder.h
--- linux-2.4.32/include/asm-i386/byteorder.h	2003-06-14 13:30:27.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-i386/byteorder.h	2005-11-17 13:32:13.000000000 +0100
@@ -2,6 +2,7 @@
 #define _I386_BYTEORDER_H
 
 #include <asm/types.h>
+#include <linux/compiler.h>
 
 #ifdef __GNUC__
 
@@ -10,7 +11,7 @@
 #include <linux/config.h>
 #endif
 
-static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
+static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
 {
 #ifdef CONFIG_X86_BSWAP
 	__asm__("bswap %0" : "=r" (x) : "0" (x));
@@ -26,7 +27,7 @@ static __inline__ __const__ __u32 ___arc
 
 /* gcc should generate this for open coded C now too. May be worth switching to 
    it because inline assembly cannot be scheduled. -AK */
-static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
+static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
 {
 	__asm__("xchgb %b0,%h0"		/* swap bytes		*/
 		: "=q" (x)
diff -rupN linux-2.4.32/include/asm-i386/processor.h linux-2.4.32.gcc4-fixes-v12/include/asm-i386/processor.h
--- linux-2.4.32/include/asm-i386/processor.h	2004-02-18 15:16:24.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-i386/processor.h	2005-11-17 13:32:13.000000000 +0100
@@ -72,7 +72,6 @@ struct cpuinfo_x86 {
  */
 
 extern struct cpuinfo_x86 boot_cpu_data;
-extern struct tss_struct init_tss[NR_CPUS];
 
 #ifdef CONFIG_SMP
 extern struct cpuinfo_x86 cpu_data[];
@@ -357,6 +356,8 @@ struct tss_struct {
 	unsigned long __cacheline_filler[5];
 };
 
+extern struct tss_struct init_tss[NR_CPUS];
+
 struct thread_struct {
 	unsigned long	esp0;
 	unsigned long	eip;
diff -rupN linux-2.4.32/include/asm-i386/string.h linux-2.4.32.gcc4-fixes-v12/include/asm-i386/string.h
--- linux-2.4.32/include/asm-i386/string.h	2001-08-12 11:35:53.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-i386/string.h	2005-11-17 13:32:13.000000000 +0100
@@ -337,7 +337,7 @@ extern void __struct_cpy_bug (void);
 #define struct_cpy(x,y) 			\
 ({						\
 	if (sizeof(*(x)) != sizeof(*(y))) 	\
-		__struct_cpy_bug;		\
+		__struct_cpy_bug();		\
 	memcpy(x, y, sizeof(*(x)));		\
 })
 
diff -rupN linux-2.4.32/include/asm-m68k/setup.h linux-2.4.32.gcc4-fixes-v12/include/asm-m68k/setup.h
--- linux-2.4.32/include/asm-m68k/setup.h	2000-01-29 13:07:40.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-m68k/setup.h	2005-11-17 13:32:13.000000000 +0100
@@ -361,12 +361,13 @@ extern int m68k_is040or060;
 #ifndef __ASSEMBLY__
 extern int m68k_num_memory;		/* # of memory blocks found (and used) */
 extern int m68k_realnum_memory;		/* real # of memory blocks found */
-extern struct mem_info m68k_memory[NUM_MEMINFO];/* memory description */
 
 struct mem_info {
 	unsigned long addr;		/* physical address of memory chunk */
 	unsigned long size;		/* length of memory chunk (in bytes) */
 };
+
+extern struct mem_info m68k_memory[NUM_MEMINFO];/* memory description */
 #endif
 
 #endif /* __KERNEL__ */
diff -rupN linux-2.4.32/include/asm-ppc/byteorder.h linux-2.4.32.gcc4-fixes-v12/include/asm-ppc/byteorder.h
--- linux-2.4.32/include/asm-ppc/byteorder.h	2003-06-14 13:30:28.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-ppc/byteorder.h	2005-11-17 13:32:13.000000000 +0100
@@ -2,6 +2,7 @@
 #define _PPC_BYTEORDER_H
 
 #include <asm/types.h>
+#include <linux/compiler.h>
 
 #ifdef __GNUC__
 #ifdef __KERNEL__
@@ -50,7 +51,7 @@ extern __inline__ void st_le64(volatile 
 	__asm__ __volatile__ ("stwbrx  %1,0,%2" : "=m" (*addr) : "r" (val), "r" (taddr+4));
 }
 
-static __inline__ __const__ __u16 ___arch__swab16(__u16 value)
+static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 value)
 {
 	__u16 result;
 
@@ -58,7 +59,7 @@ static __inline__ __const__ __u16 ___arc
 	return result;
 }
 
-static __inline__ __const__ __u32 ___arch__swab32(__u32 value)
+static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 value)
 {
 	__u32 result;
 
diff -rupN linux-2.4.32/include/asm-ppc/time.h linux-2.4.32.gcc4-fixes-v12/include/asm-ppc/time.h
--- linux-2.4.32/include/asm-ppc/time.h	2003-08-25 20:07:49.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-ppc/time.h	2005-11-17 13:32:13.000000000 +0100
@@ -12,6 +12,7 @@
 #include <linux/config.h>
 #include <linux/mc146818rtc.h>
 #include <linux/threads.h>
+#include <linux/compiler.h>
 
 #include <asm/processor.h>
 
@@ -57,7 +58,7 @@ static __inline__ void set_dec(unsigned 
 /* Accessor functions for the timebase (RTC on 601) registers. */
 /* If one day CONFIG_POWER is added just define __USE_RTC as 1 */
 #ifdef CONFIG_6xx
-extern __inline__ int const __USE_RTC(void) {
+extern __inline__ int __attribute_const__ __USE_RTC(void) {
 	return (mfspr(SPRN_PVR)>>16) == 1;
 }
 #else
diff -rupN linux-2.4.32/include/asm-x86_64/byteorder.h linux-2.4.32.gcc4-fixes-v12/include/asm-x86_64/byteorder.h
--- linux-2.4.32/include/asm-x86_64/byteorder.h	2002-11-30 17:12:31.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-x86_64/byteorder.h	2005-11-17 13:32:13.000000000 +0100
@@ -2,16 +2,17 @@
 #define _X86_64_BYTEORDER_H
 
 #include <asm/types.h>
+#include <linux/compiler.h>
 
 #ifdef __GNUC__
 
-static __inline__ __const__ __u64 ___arch__swab64(__u64 x)
+static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
 {
 	__asm__("bswapq %0" : "=r" (x) : "0" (x));
 	return x;
 }
 
-static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
+static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
 {
 	__asm__("bswapl %0" : "=r" (x) : "0" (x));
 	return x;
diff -rupN linux-2.4.32/include/asm-x86_64/processor.h linux-2.4.32.gcc4-fixes-v12/include/asm-x86_64/processor.h
--- linux-2.4.32/include/asm-x86_64/processor.h	2005-11-17 13:27:30.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/asm-x86_64/processor.h	2005-11-17 13:32:13.000000000 +0100
@@ -68,7 +68,6 @@ struct cpuinfo_x86 {
 #define X86_VENDOR_UNKNOWN 0xff
 
 extern struct cpuinfo_x86 boot_cpu_data;
-extern struct tss_struct init_tss[NR_CPUS];
 
 #ifdef CONFIG_SMP
 extern struct cpuinfo_x86 cpu_data[];
@@ -300,6 +299,8 @@ struct tss_struct {
 	u32 io_bitmap[IO_BITMAP_SIZE];
 } __attribute__((packed)) ____cacheline_aligned;
 
+extern struct tss_struct init_tss[NR_CPUS];
+
 struct thread_struct {
 	unsigned long	rsp0;
 	unsigned long	rip;
diff -rupN linux-2.4.32/include/linux/byteorder/swab.h linux-2.4.32.gcc4-fixes-v12/include/linux/byteorder/swab.h
--- linux-2.4.32/include/linux/byteorder/swab.h	2002-11-30 17:12:31.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/linux/byteorder/swab.h	2005-11-17 13:32:13.000000000 +0100
@@ -15,6 +15,8 @@
  *
  */
 
+#include <linux/compiler.h>
+
 /* casts are necessary for constants, because we never know how for sure
  * how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
  */
@@ -156,7 +158,7 @@
 #endif /* OPTIMIZE */
 
 
-static __inline__ __const__ __u16 __fswab16(__u16 x)
+static __inline__ __attribute_const__ __u16 __fswab16(__u16 x)
 {
 	return __arch__swab16(x);
 }
@@ -169,7 +171,7 @@ static __inline__ void __swab16s(__u16 *
 	__arch__swab16s(addr);
 }
 
-static __inline__ __const__ __u32 __fswab24(__u32 x)
+static __inline__ __attribute_const__ __u32 __fswab24(__u32 x)
 {
 	return __arch__swab24(x);
 }
@@ -182,7 +184,7 @@ static __inline__ void __swab24s(__u32 *
 	__arch__swab24s(addr);
 }
 
-static __inline__ __const__ __u32 __fswab32(__u32 x)
+static __inline__ __attribute_const__ __u32 __fswab32(__u32 x)
 {
 	return __arch__swab32(x);
 }
@@ -196,7 +198,7 @@ static __inline__ void __swab32s(__u32 *
 }
 
 #ifdef __BYTEORDER_HAS_U64__
-static __inline__ __const__ __u64 __fswab64(__u64 x)
+static __inline__ __attribute_const__ __u64 __fswab64(__u64 x)
 {
 #  ifdef __SWAB_64_THRU_32__
 	__u32 h = x >> 32;
diff -rupN linux-2.4.32/include/linux/compiler.h linux-2.4.32.gcc4-fixes-v12/include/linux/compiler.h
--- linux-2.4.32/include/linux/compiler.h	2004-11-17 18:36:42.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/linux/compiler.h	2005-11-17 13:32:13.000000000 +0100
@@ -27,6 +27,12 @@
 #define __attribute_used__	/* not implemented */
 #endif /* __GNUC__ */
 
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+#define __attribute_const__	__attribute__((__const__))
+#else
+#define __attribute_const__	/* unimplemented */
+#endif
+
 #if __GNUC__ == 3
 #if __GNUC_MINOR__ >= 1
 # define inline         __inline__ __attribute__((always_inline))
diff -rupN linux-2.4.32/include/linux/fs.h linux-2.4.32.gcc4-fixes-v12/include/linux/fs.h
--- linux-2.4.32/include/linux/fs.h	2005-04-04 19:56:05.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/include/linux/fs.h	2005-11-17 13:32:13.000000000 +0100
@@ -1559,7 +1559,6 @@ static inline int is_mounted(kdev_t dev)
 unsigned long generate_cluster(kdev_t, int b[], int);
 unsigned long generate_cluster_swab32(kdev_t, int b[], int);
 extern kdev_t ROOT_DEV;
-extern char root_device_name[];
 
 
 extern void show_buffers(void);
diff -rupN linux-2.4.32/include/linux/ufs_fs.h linux-2.4.32.gcc4-fixes-v12/include/linux/ufs_fs.h
--- linux-2.4.32/include/linux/ufs_fs.h	2001-11-23 22:40:15.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/linux/ufs_fs.h	2005-11-17 13:32:13.000000000 +0100
@@ -555,7 +555,6 @@ extern struct buffer_head * ufs_bread (s
 extern struct file_operations ufs_dir_operations;
         
 /* super.c */
-extern struct file_system_type ufs_fs_type;
 extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
diff -rupN linux-2.4.32/include/linux/usbdevice_fs.h linux-2.4.32.gcc4-fixes-v12/include/linux/usbdevice_fs.h
--- linux-2.4.32/include/linux/usbdevice_fs.h	2003-11-29 00:28:14.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/linux/usbdevice_fs.h	2005-11-17 13:32:13.000000000 +0100
@@ -185,8 +185,6 @@ extern struct file_operations usbdevfs_d
 extern struct file_operations usbdevfs_devices_fops;
 extern struct file_operations usbdevfs_device_file_operations;
 extern struct inode_operations usbdevfs_device_inode_operations;
-extern struct inode_operations usbdevfs_bus_inode_operations;
-extern struct file_operations usbdevfs_bus_file_operations;
 extern void usbdevfs_conn_disc_event(void);
 
 #endif /* __KERNEL__ */
diff -rupN linux-2.4.32/include/net/icmp.h linux-2.4.32.gcc4-fixes-v12/include/net/icmp.h
--- linux-2.4.32/include/net/icmp.h	2001-04-28 12:35:26.000000000 +0200
+++ linux-2.4.32.gcc4-fixes-v12/include/net/icmp.h	2005-11-17 13:32:13.000000000 +0100
@@ -23,6 +23,7 @@
 
 #include <net/sock.h>
 #include <net/protocol.h>
+#include <net/snmp.h>
 
 struct icmp_err {
   int		errno;
diff -rupN linux-2.4.32/include/net/ipv6.h linux-2.4.32.gcc4-fixes-v12/include/net/ipv6.h
--- linux-2.4.32/include/net/ipv6.h	2004-11-17 18:36:43.000000000 +0100
+++ linux-2.4.32.gcc4-fixes-v12/include/net/ipv6.h	2005-11-17 13:32:13.000000000 +0100
@@ -101,6 +101,7 @@ struct frag_hdr {
 #ifdef __KERNEL__
 
 #include <net/sock.h>
+#include <net/snmp.h>
 
 /* sysctls */
 extern int sysctl_ipv6_bindv6only;
