Another potential data corruption fix.

The 32bit truncate64 on x86-64 did silently truncate 
offsets >32bit. That broke mysql for example. Fix that.

>From Chris Wilson



 arch/x86_64/ia32/ia32entry.S |    4 ++--
 arch/x86_64/ia32/sys_ia32.c  |   15 +++++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff -puN arch/x86_64/ia32/ia32entry.S~x86_64-04 arch/x86_64/ia32/ia32entry.S
--- 25/arch/x86_64/ia32/ia32entry.S~x86_64-04	2003-12-24 00:05:27.000000000 -0800
+++ 25-akpm/arch/x86_64/ia32/ia32entry.S	2003-12-24 00:05:27.000000000 -0800
@@ -396,8 +396,8 @@ ia32_sys_call_table:
 	.quad stub32_vfork            /* 190 */
 	.quad compat_sys_getrlimit
 	.quad sys32_mmap2
-	.quad sys_truncate
-	.quad sys_ftruncate
+	.quad sys32_truncate64
+	.quad sys32_ftruncate64
 	.quad sys32_stat64		/* 195 */
 	.quad sys32_lstat64
 	.quad sys32_fstat64
diff -puN arch/x86_64/ia32/sys_ia32.c~x86_64-04 arch/x86_64/ia32/sys_ia32.c
--- 25/arch/x86_64/ia32/sys_ia32.c~x86_64-04	2003-12-24 00:05:27.000000000 -0800
+++ 25-akpm/arch/x86_64/ia32/sys_ia32.c	2003-12-24 00:05:27.000000000 -0800
@@ -110,6 +110,21 @@ int cp_compat_stat(struct kstat *kbuf, s
 	return 0;
 }
 
+extern long sys_truncate(char *, loff_t);
+extern long sys_ftruncate(int, loff_t);
+
+asmlinkage long
+sys32_truncate64(char * filename, unsigned long offset_low, unsigned long offset_high)
+{
+       return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
+}
+
+asmlinkage long
+sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high)
+{
+       return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
+}
+
 /* Another set for IA32/LFS -- x86_64 struct stat is different due to 
    support for 64bit inode numbers. */
 

_