r1935 - / trunk/patches

jim at linuxfromscratch.org jim at linuxfromscratch.org
Sat Jul 8 17:57:57 PDT 2006


Author: jim
Date: 2006-07-08 18:57:57 -0600 (Sat, 08 Jul 2006)
New Revision: 1935

Added:
   trunk/patches/linux-2.6.17.4-mips_fixes-2.patch
Removed:
   trunk/patches/linux-2.6.17.4-mips_fixes-1.patch
Modified:
   /
Log:
 r4411 at server (orig r2032):  jim | 2006-07-08 17:52:42 -0700
 Updated Linux MIPS Fixes patch



Property changes on: 
___________________________________________________________________
Name: svk:merge
   - b6734a72-470d-0410-b049-f317dca95413:/:2031
   + b6734a72-470d-0410-b049-f317dca95413:/:2032

Deleted: trunk/patches/linux-2.6.17.4-mips_fixes-1.patch
===================================================================
--- trunk/patches/linux-2.6.17.4-mips_fixes-1.patch	2006-07-08 19:46:03 UTC (rev 1934)
+++ trunk/patches/linux-2.6.17.4-mips_fixes-1.patch	2006-07-09 00:57:57 UTC (rev 1935)
@@ -1,230 +0,0 @@
-Submitted By: Jim Gifford (patches at jg555 dot com)
-Date: 2006-07-08
-Initial Package Version: 2.6.17.4
-Origin: Linux-MIPS Mailing List
-Upstream Status: Not Applied
-Description: These are patches that have not been accepted by
-	     Linux-MIPS.
-
-	1 - iomap for MIPS - iomap.c io.h
-	2 - Cobalt ide fixes
-
-diff -Naur linux-2.6.17.4/arch/mips/lib/iomap.c linux-2.6.17.4.kernel/arch/mips/lib/iomap.c
---- linux-2.6.17.4/arch/mips/lib/iomap.c	1969-12-31 16:00:00.000000000 -0800
-+++ linux-2.6.17.4.kernel/arch/mips/lib/iomap.c	2006-06-30 10:37:38.000000000 -0700
-@@ -0,0 +1,78 @@
-+/*
-+ *  iomap.c, Memory Mapped I/O routines for MIPS architecture.
-+ *
-+ *  This code is based on lib/iomap.c, by Linus Torvalds.
-+ *
-+ *  Copyright (C) 2004-2005  Yoichi Yuasa <yoichi_yuasa at tripeaks.co.jp>
-+ *
-+ *  This program is free software; you can redistribute it and/or modify
-+ *  it under the terms of the GNU General Public License as published by
-+ *  the Free Software Foundation; either version 2 of the License, or
-+ *  (at your option) any later version.
-+ *
-+ *  This program is distributed in the hope that it will be useful,
-+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-+ *  GNU General Public License for more details.
-+ *
-+ *  You should have received a copy of the GNU General Public License
-+ *  along with this program; if not, write to the Free Software
-+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-+ */
-+#include <linux/ioport.h>
-+#include <linux/module.h>
-+#include <linux/pci.h>
-+
-+#include <asm/io.h>
-+
-+void __iomem *ioport_map(unsigned long port, unsigned int nr)
-+{
-+	unsigned long end;
-+
-+	end = port + nr - 1UL;
-+	if (ioport_resource.start > port ||
-+	    ioport_resource.end < end || port > end)
-+		return NULL;
-+
-+	return (void __iomem *)(mips_io_port_base + port);
-+}
-+
-+void ioport_unmap(void __iomem *addr)
-+{
-+}
-+EXPORT_SYMBOL(ioport_map);
-+EXPORT_SYMBOL(ioport_unmap);
-+
-+void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
-+{
-+	unsigned long start, len, flags;
-+
-+	if (dev == NULL)
-+		return NULL;
-+
-+	start = pci_resource_start(dev, bar);
-+	len = pci_resource_len(dev, bar);
-+	if (!start || !len)
-+		return NULL;
-+
-+	if (maxlen != 0 && len > maxlen)
-+		len = maxlen;
-+
-+	flags = pci_resource_flags(dev, bar);
-+	if (flags & IORESOURCE_IO)
-+		return ioport_map(start, len);
-+	if (flags & IORESOURCE_MEM) {
-+		if (flags & IORESOURCE_CACHEABLE)
-+			return ioremap_cachable(start, len);
-+		return ioremap_nocache(start, len);
-+	}
-+
-+	return NULL;
-+}
-+
-+void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
-+{
-+	iounmap(addr);
-+}
-+EXPORT_SYMBOL(pci_iomap);
-+EXPORT_SYMBOL(pci_iounmap);
-diff -Naur linux-2.6.17.4/arch/mips/lib/Makefile linux-2.6.17.4.kernel/arch/mips/lib/Makefile
---- linux-2.6.17.4/arch/mips/lib/Makefile	2006-07-02 01:53:19.000000000 -0700
-+++ linux-2.6.17.4.kernel/arch/mips/lib/Makefile	2006-07-07 12:40:23.000000000 -0700
-@@ -5,6 +5,8 @@
- lib-y	+= csum_partial_copy.o memcpy.o promlib.o strlen_user.o strncpy_user.o \
- 	   strnlen_user.o uncached.o
- 
-+obj-y	+= iomap.o
-+
- # libgcc-style stuff needed in the kernel
- lib-y += ashldi3.o ashrdi3.o lshrdi3.o
- 
-diff -Naur linux-2.6.17.4/include/asm-mips/io.h linux-2.6.17.4.kernel/include/asm-mips/io.h
---- linux-2.6.17.4/include/asm-mips/io.h	2006-07-02 01:53:19.000000000 -0700
-+++ linux-2.6.17.4.kernel/include/asm-mips/io.h	2006-07-07 12:44:03.000000000 -0700
-@@ -519,6 +519,34 @@
- }
- 
- /*
-+ * Memory Mapped I/O
-+ */
-+#define ioread8(addr)		readb(addr)
-+#define ioread16(addr)		readw(addr)
-+#define ioread32(addr)		readl(addr)
-+
-+#define iowrite8(b,addr)	writeb(b,addr)
-+#define iowrite16(w,addr)	writew(w,addr)
-+#define iowrite32(l,addr)	writel(l,addr)
-+
-+#define ioread8_rep(a,b,c)	readsb(a,b,c)
-+#define ioread16_rep(a,b,c)	readsw(a,b,c)
-+#define ioread32_rep(a,b,c)	readsl(a,b,c)
-+
-+#define iowrite8_rep(a,b,c)	writesb(a,b,c)
-+#define iowrite16_rep(a,b,c)	writesw(a,b,c)
-+#define iowrite32_rep(a,b,c)	writesl(a,b,c)
-+
-+/* Create a virtual mapping cookie for an IO port range */
-+extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
-+extern void ioport_unmap(void __iomem *);
-+
-+/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
-+struct pci_dev;
-+extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
-+extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
-+
-+/*
-  * ISA space is 'always mapped' on currently supported MIPS systems, no need
-  * to explicitly ioremap() it. The fact that the ISA IO space is mapped
-  * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
-diff -Naur linux-2.6.17.4/include/asm-mips/mach-cobalt/ide.h linux-2.6.17.4.kernel/include/asm-mips/mach-cobalt/ide.h
---- linux-2.6.17.4/include/asm-mips/mach-cobalt/ide.h	1969-12-31 16:00:00.000000000 -0800
-+++ linux-2.6.17.4.kernel/include/asm-mips/mach-cobalt/ide.h	2006-07-07 12:40:46.000000000 -0700
-@@ -0,0 +1,83 @@
-+
-+/*
-+ * PIO "in" transfers can cause D-cache lines to be allocated
-+ * to the data being read. If the target is the page cache then
-+ * the kernel can create a user space mapping of the same page
-+ * without flushing it from the D-cache. This has large potential
-+ * to create cache aliases. The Cobalts seem to trigger this
-+ * problem easily.
-+ *
-+ * MIPs doesn't have a flush_dcache_range() so we roll
-+ * our own.
-+ *
-+ * -- pdh
-+ */
-+
-+#define MAX_HWIFS			2
-+
-+#include <asm/r4kcache.h>
-+
-+static inline void __flush_dcache(void)
-+{
-+	unsigned long dc_size, dc_line, addr, end;
-+
-+	dc_size = current_cpu_data.dcache.ways << current_cpu_data.dcache.waybit;
-+	dc_line = current_cpu_data.dcache.linesz;
-+
-+	addr = CKSEG0;
-+	end = addr + dc_size;
-+
-+	for (; addr < end; addr += dc_line)
-+		flush_dcache_line_indexed(addr);
-+}
-+
-+static inline void __flush_dcache_range(unsigned long start, unsigned long end)
-+{
-+	unsigned long dc_size, dc_line, addr;
-+
-+	dc_size = current_cpu_data.dcache.ways << current_cpu_data.dcache.waybit;
-+	dc_line = current_cpu_data.dcache.linesz;
-+
-+	addr = start & ~(dc_line - 1);
-+	end += dc_line - 1;
-+
-+	if (end - addr < dc_size)
-+		for (; addr < end; addr += dc_line)
-+			flush_dcache_line(addr);
-+	else
-+		__flush_dcache();
-+}
-+
-+static inline void __ide_insw(unsigned long port, void *addr, unsigned int count)
-+{
-+	insw(port, addr, count);
-+
-+	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 2);
-+}
-+
-+static inline void __ide_insl(unsigned long port, void *addr, unsigned int count)
-+{
-+	insl(port, addr, count);
-+
-+	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 4);
-+}
-+
-+static inline void __ide_mm_insw(volatile void __iomem *port, void *addr, unsigned int count)
-+{
-+	readsw(port, addr, count);
-+
-+	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 2);
-+}
-+
-+static inline void __ide_mm_insl(volatile void __iomem *port, void *addr, unsigned int count)
-+{
-+	readsl(port, addr, count);
-+
-+	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 4);
-+}
-+
-+#define insw			__ide_insw
-+#define insl			__ide_insl
-+
-+#define __ide_mm_outsw		writesw
-+#define __ide_mm_outsl		writesl

Added: trunk/patches/linux-2.6.17.4-mips_fixes-2.patch
===================================================================
--- trunk/patches/linux-2.6.17.4-mips_fixes-2.patch	                        (rev 0)
+++ trunk/patches/linux-2.6.17.4-mips_fixes-2.patch	2006-07-09 00:57:57 UTC (rev 1935)
@@ -0,0 +1,361 @@
+Submitted By: Jim Gifford (patches at jg555 dot com)
+Date: 2006-07-08
+Initial Package Version: 2.6.17.4
+Origin: Linux-MIPS Mailing List
+Upstream Status: Not Applied
+Description: These are patches that have not been accepted by
+	     Linux-MIPS.
+
+	1 - iomap for MIPS - iomap.c io.h
+	2 - Cobalt ide fixes
+
+diff -Naur linux-2.6.17.4/arch/mips/lib/iomap.c linux-2.6.17.4.kernel/arch/mips/lib/iomap.c
+--- linux-2.6.17.4/arch/mips/lib/iomap.c	1969-12-31 16:00:00.000000000 -0800
++++ linux-2.6.17.4.kernel/arch/mips/lib/iomap.c	2006-06-30 10:37:38.000000000 -0700
+@@ -0,0 +1,78 @@
++/*
++ *  iomap.c, Memory Mapped I/O routines for MIPS architecture.
++ *
++ *  This code is based on lib/iomap.c, by Linus Torvalds.
++ *
++ *  Copyright (C) 2004-2005  Yoichi Yuasa <yoichi_yuasa at tripeaks.co.jp>
++ *
++ *  This program is free software; you can redistribute it and/or modify
++ *  it under the terms of the GNU General Public License as published by
++ *  the Free Software Foundation; either version 2 of the License, or
++ *  (at your option) any later version.
++ *
++ *  This program is distributed in the hope that it will be useful,
++ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ *  GNU General Public License for more details.
++ *
++ *  You should have received a copy of the GNU General Public License
++ *  along with this program; if not, write to the Free Software
++ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
++ */
++#include <linux/ioport.h>
++#include <linux/module.h>
++#include <linux/pci.h>
++
++#include <asm/io.h>
++
++void __iomem *ioport_map(unsigned long port, unsigned int nr)
++{
++	unsigned long end;
++
++	end = port + nr - 1UL;
++	if (ioport_resource.start > port ||
++	    ioport_resource.end < end || port > end)
++		return NULL;
++
++	return (void __iomem *)(mips_io_port_base + port);
++}
++
++void ioport_unmap(void __iomem *addr)
++{
++}
++EXPORT_SYMBOL(ioport_map);
++EXPORT_SYMBOL(ioport_unmap);
++
++void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
++{
++	unsigned long start, len, flags;
++
++	if (dev == NULL)
++		return NULL;
++
++	start = pci_resource_start(dev, bar);
++	len = pci_resource_len(dev, bar);
++	if (!start || !len)
++		return NULL;
++
++	if (maxlen != 0 && len > maxlen)
++		len = maxlen;
++
++	flags = pci_resource_flags(dev, bar);
++	if (flags & IORESOURCE_IO)
++		return ioport_map(start, len);
++	if (flags & IORESOURCE_MEM) {
++		if (flags & IORESOURCE_CACHEABLE)
++			return ioremap_cachable(start, len);
++		return ioremap_nocache(start, len);
++	}
++
++	return NULL;
++}
++
++void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
++{
++	iounmap(addr);
++}
++EXPORT_SYMBOL(pci_iomap);
++EXPORT_SYMBOL(pci_iounmap);
+diff -Naur linux-2.6.17.4/arch/mips/lib/Makefile linux-2.6.17.4.kernel/arch/mips/lib/Makefile
+--- linux-2.6.17.4/arch/mips/lib/Makefile	2006-07-02 01:53:19.000000000 -0700
++++ linux-2.6.17.4.kernel/arch/mips/lib/Makefile	2006-07-07 12:40:23.000000000 -0700
+@@ -5,6 +5,8 @@
+ lib-y	+= csum_partial_copy.o memcpy.o promlib.o strlen_user.o strncpy_user.o \
+ 	   strnlen_user.o uncached.o
+ 
++obj-y	+= iomap.o
++
+ # libgcc-style stuff needed in the kernel
+ lib-y += ashldi3.o ashrdi3.o lshrdi3.o
+ 
+diff -Naur linux-2.6.17.4/include/asm-mips/io.h linux-2.6.17.4.kernel/include/asm-mips/io.h
+--- linux-2.6.17.4/include/asm-mips/io.h	2006-07-02 01:53:19.000000000 -0700
++++ linux-2.6.17.4.kernel/include/asm-mips/io.h	2006-07-07 12:44:03.000000000 -0700
+@@ -519,6 +519,34 @@
+ }
+ 
+ /*
++ * Memory Mapped I/O
++ */
++#define ioread8(addr)		readb(addr)
++#define ioread16(addr)		readw(addr)
++#define ioread32(addr)		readl(addr)
++
++#define iowrite8(b,addr)	writeb(b,addr)
++#define iowrite16(w,addr)	writew(w,addr)
++#define iowrite32(l,addr)	writel(l,addr)
++
++#define ioread8_rep(a,b,c)	readsb(a,b,c)
++#define ioread16_rep(a,b,c)	readsw(a,b,c)
++#define ioread32_rep(a,b,c)	readsl(a,b,c)
++
++#define iowrite8_rep(a,b,c)	writesb(a,b,c)
++#define iowrite16_rep(a,b,c)	writesw(a,b,c)
++#define iowrite32_rep(a,b,c)	writesl(a,b,c)
++
++/* Create a virtual mapping cookie for an IO port range */
++extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
++extern void ioport_unmap(void __iomem *);
++
++/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
++struct pci_dev;
++extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
++extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
++
++/*
+  * ISA space is 'always mapped' on currently supported MIPS systems, no need
+  * to explicitly ioremap() it. The fact that the ISA IO space is mapped
+  * to PAGE_OFFSET is pure coincidence - it does not mean ISA values
+diff -Naur linux-2.6.17.4/include/asm-mips/mach-cobalt/ide.h linux-2.6.17.4.kernel/include/asm-mips/mach-cobalt/ide.h
+--- linux-2.6.17.4/include/asm-mips/mach-cobalt/ide.h	1969-12-31 16:00:00.000000000 -0800
++++ linux-2.6.17.4.kernel/include/asm-mips/mach-cobalt/ide.h	2006-07-07 12:40:46.000000000 -0700
+@@ -0,0 +1,83 @@
++
++/*
++ * PIO "in" transfers can cause D-cache lines to be allocated
++ * to the data being read. If the target is the page cache then
++ * the kernel can create a user space mapping of the same page
++ * without flushing it from the D-cache. This has large potential
++ * to create cache aliases. The Cobalts seem to trigger this
++ * problem easily.
++ *
++ * MIPs doesn't have a flush_dcache_range() so we roll
++ * our own.
++ *
++ * -- pdh
++ */
++
++#define MAX_HWIFS			2
++
++#include <asm/r4kcache.h>
++
++static inline void __flush_dcache(void)
++{
++	unsigned long dc_size, dc_line, addr, end;
++
++	dc_size = current_cpu_data.dcache.ways << current_cpu_data.dcache.waybit;
++	dc_line = current_cpu_data.dcache.linesz;
++
++	addr = CKSEG0;
++	end = addr + dc_size;
++
++	for (; addr < end; addr += dc_line)
++		flush_dcache_line_indexed(addr);
++}
++
++static inline void __flush_dcache_range(unsigned long start, unsigned long end)
++{
++	unsigned long dc_size, dc_line, addr;
++
++	dc_size = current_cpu_data.dcache.ways << current_cpu_data.dcache.waybit;
++	dc_line = current_cpu_data.dcache.linesz;
++
++	addr = start & ~(dc_line - 1);
++	end += dc_line - 1;
++
++	if (end - addr < dc_size)
++		for (; addr < end; addr += dc_line)
++			flush_dcache_line(addr);
++	else
++		__flush_dcache();
++}
++
++static inline void __ide_insw(unsigned long port, void *addr, unsigned int count)
++{
++	insw(port, addr, count);
++
++	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 2);
++}
++
++static inline void __ide_insl(unsigned long port, void *addr, unsigned int count)
++{
++	insl(port, addr, count);
++
++	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 4);
++}
++
++static inline void __ide_mm_insw(volatile void __iomem *port, void *addr, unsigned int count)
++{
++	readsw(port, addr, count);
++
++	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 2);
++}
++
++static inline void __ide_mm_insl(volatile void __iomem *port, void *addr, unsigned int count)
++{
++	readsl(port, addr, count);
++
++	__flush_dcache_range((unsigned long) addr, (unsigned long) addr + count * 4);
++}
++
++#define insw			__ide_insw
++#define insl			__ide_insl
++
++#define __ide_mm_outsw		writesw
++#define __ide_mm_outsl		writesl
+diff -Naur linux-2.6.17.4/arch/mips/lib/ashldi3.c linux-2.6.17.4/arch/mips/lib/ashldi3.c
+--- linux-2.6.17.4/arch/mips/lib/ashldi3.c	1969-12-31 16:00:00.000000000 -0800
++++ linux-2.6.17.4/arch/mips/lib/ashldi3.c	2006-06-19 18:16:13.000000000 -0700
+@@ -0,0 +1,29 @@
++#include <linux/module.h>
++
++#include "libgcc.h"
++
++long long __ashldi3(long long u, word_type b)
++{
++	DWunion uu, w;
++	word_type bm;
++
++	if (b == 0)
++		return u;
++
++	uu.ll = u;
++	bm = 32 - b;
++
++	if (bm <= 0) {
++		w.s.low = 0;
++		w.s.high = (unsigned int) uu.s.low << -bm;
++	} else {
++		const unsigned int carries = (unsigned int) uu.s.low >> bm;
++
++		w.s.low = (unsigned int) uu.s.low << b;
++		w.s.high = ((unsigned int) uu.s.high << b) | carries;
++	}
++
++	return w.ll;
++}
++
++EXPORT_SYMBOL(__ashldi3);
+diff -Naur linux-2.6.17.4/arch/mips/lib/ashrdi3.c linux-2.6.17.4/arch/mips/lib/ashrdi3.c
+--- linux-2.6.17.4/arch/mips/lib/ashrdi3.c	1969-12-31 16:00:00.000000000 -0800
++++ linux-2.6.17.4/arch/mips/lib/ashrdi3.c	2006-06-19 18:16:13.000000000 -0700
+@@ -0,0 +1,31 @@
++#include <linux/module.h>
++
++#include "libgcc.h"
++
++long long __ashrdi3(long long u, word_type b)
++{
++	DWunion uu, w;
++	word_type bm;
++
++	if (b == 0)
++		return u;
++
++	uu.ll = u;
++	bm = 32 - b;
++
++	if (bm <= 0) {
++		/* w.s.high = 1..1 or 0..0 */
++		w.s.high =
++		    uu.s.high >> 31;
++		w.s.low = uu.s.high >> -bm;
++	} else {
++		const unsigned int carries = (unsigned int) uu.s.high << bm;
++
++		w.s.high = uu.s.high >> b;
++		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
++	}
++
++	return w.ll;
++}
++
++EXPORT_SYMBOL(__ashrdi3);
+diff -Naur linux-2.6.17.4/arch/mips/lib/libgcc.h linux-2.6.17.4/arch/mips/lib/libgcc.h
+--- linux-2.6.17.4/arch/mips/lib/libgcc.h	1969-12-31 16:00:00.000000000 -0800
++++ linux-2.6.17.4/arch/mips/lib/libgcc.h	2006-06-19 18:16:13.000000000 -0700
+@@ -0,0 +1,26 @@
++#ifndef __ASM_LIBGCC_H
++#define __ASM_LIBGCC_H
++
++#include <asm/byteorder.h>
++
++typedef int word_type __attribute__ ((mode (__word__)));
++
++#ifdef __BIG_ENDIAN
++struct DWstruct {
++	int high, low;
++};
++#elif defined(__LITTLE_ENDIAN)
++struct DWstruct {
++	int low, high;
++};
++#else
++#error I feel sick.
++#endif
++
++typedef union
++{
++	struct DWstruct s;
++	long long ll;
++} DWunion;
++
++#endif /* __ASM_LIBGCC_H */
+diff -Naur linux-2.6.17.4/arch/mips/lib/lshrdi3.c linux-2.6.17.4/arch/mips/lib/lshrdi3.c
+--- linux-2.6.17.4/arch/mips/lib/lshrdi3.c	1969-12-31 16:00:00.000000000 -0800
++++ linux-2.6.17.4/arch/mips/lib/lshrdi3.c	2006-06-19 18:16:13.000000000 -0700
+@@ -0,0 +1,29 @@
++#include <linux/module.h>
++
++#include "libgcc.h"
++
++long long __lshrdi3(long long u, word_type b)
++{
++	DWunion uu, w;
++	word_type bm;
++
++	if (b == 0)
++		return u;
++
++	uu.ll = u;
++	bm = 32 - b;
++
++	if (bm <= 0) {
++		w.s.high = 0;
++		w.s.low = (unsigned int) uu.s.high >> -bm;
++	} else {
++		const unsigned int carries = (unsigned int) uu.s.high << bm;
++
++		w.s.high = (unsigned int) uu.s.high >> b;
++		w.s.low = ((unsigned int) uu.s.low >> b) | carries;
++	}
++
++	return w.ll;
++}
++
++EXPORT_SYMBOL(__lshrdi3);




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