Re: Assorted 2.6.0-test2 build warnings

From: Randy.Dunlap (rddunlap@osdl.org)
Date: Mon Jul 28 2003 - 17:11:04 EST

On Sun, 27 Jul 2003 20:57:31 -0400 "J.C. Wren" <jcwren@jcwren.com> wrote:

| Assorted warnings building 2.6.0-test2, on an Athlon:
|
| CC fs/ntfs/super.o
| fs/ntfs/super.c: In function `is_boot_sector_ntfs':
| fs/ntfs/super.c:375: warning: integer constant is too large for "long" type

Please see if the patch below fixes this one.

| CC fs/smbfs/ioctl.o
| fs/smbfs/ioctl.c: In function `smb_ioctl':
| fs/smbfs/ioctl.c:36: warning: comparison is always false due to limited range of data type
| fs/smbfs/ioctl.c:36: warning: comparison is always false due to limited range of data type
| fs/smbfs/ioctl.c:36: warning: comparison is always false due to limited range of data type
| fs/smbfs/ioctl.c:36: warning: comparison is always false due to limited range of data type

Hm, appears to be on NEW_TO_OLD_UID(server->mnt->mounted_uid)
to me. mounted_uid is of type __kernel_uid_t, which is unsigned short
on i386, so NEW_TO_OLD_UID() is rather useless on it.
Should mounted_uid be __kernel_uid32_t instead?

| CC drivers/char/vt_ioctl.o
| drivers/char/vt_ioctl.c: In function `do_kdsk_ioctl':
| drivers/char/vt_ioctl.c:85: warning: comparison is always false due to limited range of data type
| drivers/char/vt_ioctl.c:85: warning: comparison is always false due to limited range of data type

Yes, line 85 is useless as it is.

What -W (?) options are you compiling with? I'm not seeing these.

| drivers/char/vt_ioctl.c: In function `do_kdgkb_ioctl':
| drivers/char/vt_ioctl.c:211: warning: comparison is always false due to limited range of data type

Another unsigned char compared to value > 255.

| CC drivers/char/keyboard.o
| drivers/char/keyboard.c: In function `k_fn':
| drivers/char/keyboard.c:665: warning: comparison is always true due to limited range of data type

Right, same as above.

| CC drivers/video/matrox/matroxfb_g450.o
| drivers/video/matrox/matroxfb_g450.c: In function `g450_compute_bwlevel':
| drivers/video/matrox/matroxfb_g450.c:129: warning: duplicate `const'
| drivers/video/matrox/matroxfb_g450.c:130: warning: duplicate `const'

| AS arch/i386/boot/setup.o
| arch/i386/boot/setup.S: Assembler messages:
| arch/i386/boot/setup.S:165: Warning: value 0x37ffffff truncated to 0x37ffffff

Interesting. How do I make this happen on my system?

Are you using some old (or new) version of gcc/gas or what? 

--
~Randy

patch_name:	ntfs_ulong.patch
patch_version:	2003-07-28.14:29:57
author:		Randy.Dunlap <rddunlap@osdl.org>
description:	make a constant be UL;
product:	Linux
product_versions: 2.6.0-test2
maintainer:	Anton Altaparmakov <aia21@cantab.net>
diffstat:	=
 fs/ntfs/layout.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -Naurp ./fs/ntfs/layout.h~type ./fs/ntfs/layout.h
--- ./fs/ntfs/layout.h~type	2003-07-27 10:02:48.000000000 -0700
+++ ./fs/ntfs/layout.h	2003-07-28 14:05:20.000000000 -0700
@@ -43,7 +43,7 @@
 #define const_cpu_to_le64(x)	__constant_cpu_to_le64(x)
 
 /* The NTFS oem_id */
-#define magicNTFS	const_cpu_to_le64(0x202020205346544e) /* "NTFS    " */
+#define magicNTFS	const_cpu_to_le64(0x202020205346544eUL) /* "NTFS    " */
 
 /*
  * Location of bootsector on partition:
-
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