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Subject[PATCH][2.6] WARN_ON_STACK_VAR aka fighting variable lifetime bugs
This macro allows us to detect whether a variable is on the stack or not. 
Originally devised to help detect some strange IDE/elevator bugs Bill and
myself came across in the -wli tree. My apologies as it's simply cut and
paste for the other architectures, hopefully it doesn't break on
something badly, i don't know them all that well.

asm-alpha/bug.h | 4 ++++
asm-arm/bug.h | 4 ++++
asm-arm26/bug.h | 4 ++++
asm-cris/bug.h | 4 ++++
asm-h8300/bug.h | 4 ++++
asm-i386/bug.h | 4 ++++
asm-ia64/bug.h | 4 ++++
asm-m68k/bug.h | 4 ++++
asm-m68knommu/bug.h | 4 ++++
asm-mips/bug.h | 4 ++++
asm-mips64/bug.h | 4 ++++
asm-parisc/bug.h | 4 ++++
asm-ppc/bug.h | 4 ++++
asm-ppc64/bug.h | 4 ++++
asm-s390/bug.h | 4 ++++
asm-sh/bug.h | 4 ++++
asm-sparc/bug.h | 4 ++++
asm-sparc64/bug.h | 4 ++++
asm-um/bug.h | 4 ++++
asm-v850/bug.h | 4 ++++
asm-x86_64/bug.h | 4 ++++
21 files changed, 84 insertions(+)

Index: linux-2.6.0-test2-irq/include/asm-alpha/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-alpha/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-alpha/bug.h 30 Jul 2003 00:06:37 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-alpha/bug.h 9 Aug 2003 19:14:55 -0000
@@ -20,4 +20,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-arm/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-arm/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-arm/bug.h 30 Jul 2003 00:06:36 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-arm/bug.h 9 Aug 2003 19:14:42 -0000
@@ -27,4 +27,8 @@ extern volatile void __bug(const char *f
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-arm26/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-arm26/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-arm26/bug.h 30 Jul 2003 00:06:39 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-arm26/bug.h 9 Aug 2003 19:14:33 -0000
@@ -27,4 +27,8 @@ extern volatile void __bug(const char *f
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-cris/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-cris/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-cris/bug.h 30 Jul 2003 00:06:39 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-cris/bug.h 9 Aug 2003 19:14:25 -0000
@@ -18,4 +18,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-h8300/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-h8300/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-h8300/bug.h 30 Jul 2003 00:06:37 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-h8300/bug.h 9 Aug 2003 19:14:18 -0000
@@ -18,4 +18,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-i386/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-i386/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-i386/bug.h 30 Jul 2003 00:06:38 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-i386/bug.h 9 Aug 2003 16:28:34 -0000
@@ -32,4 +32,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-ia64/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-ia64/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-ia64/bug.h 30 Jul 2003 00:06:30 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-ia64/bug.h 9 Aug 2003 19:14:09 -0000
@@ -19,4 +19,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-m68k/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-m68k/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-m68k/bug.h 30 Jul 2003 00:06:32 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-m68k/bug.h 9 Aug 2003 19:14:00 -0000
@@ -37,4 +37,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-m68knommu/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-m68knommu/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-m68knommu/bug.h 30 Jul 2003 00:06:32 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-m68knommu/bug.h 9 Aug 2003 19:09:11 -0000
@@ -21,4 +21,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-mips/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-mips/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-mips/bug.h 30 Jul 2003 00:06:29 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-mips/bug.h 9 Aug 2003 19:09:01 -0000
@@ -18,4 +18,8 @@ do { \
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-mips64/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-mips64/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-mips64/bug.h 30 Jul 2003 00:06:30 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-mips64/bug.h 9 Aug 2003 19:08:53 -0000
@@ -18,4 +18,8 @@ do { \
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-parisc/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-parisc/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-parisc/bug.h 30 Jul 2003 00:06:32 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-parisc/bug.h 9 Aug 2003 19:08:46 -0000
@@ -26,4 +26,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-ppc/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-ppc/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-ppc/bug.h 30 Jul 2003 00:06:31 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-ppc/bug.h 9 Aug 2003 19:08:38 -0000
@@ -45,4 +45,8 @@ struct bug_entry {
"i" (__FILE__), "i" (__FUNCTION__)); \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-ppc64/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-ppc64/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-ppc64/bug.h 30 Jul 2003 00:06:28 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-ppc64/bug.h 9 Aug 2003 19:07:25 -0000
@@ -55,5 +55,9 @@ struct bug_entry {
"i" (__FILE__), "i" (__FUNCTION__)); \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
#endif
Index: linux-2.6.0-test2-irq/include/asm-s390/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-s390/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-s390/bug.h 30 Jul 2003 00:06:38 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-s390/bug.h 9 Aug 2003 19:06:51 -0000
@@ -22,4 +22,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-sh/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-sh/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-sh/bug.h 30 Jul 2003 00:06:39 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-sh/bug.h 9 Aug 2003 19:06:43 -0000
@@ -27,4 +27,8 @@
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-sparc/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-sparc/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-sparc/bug.h 30 Jul 2003 00:06:37 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-sparc/bug.h 9 Aug 2003 19:06:34 -0000
@@ -41,4 +41,8 @@ extern void do_BUG(const char *file, int
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-sparc64/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-sparc64/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-sparc64/bug.h 30 Jul 2003 00:06:38 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-sparc64/bug.h 9 Aug 2003 19:06:22 -0000
@@ -29,4 +29,8 @@ extern void do_BUG(const char *file, int
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-um/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-um/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-um/bug.h 30 Jul 2003 00:06:35 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-um/bug.h 9 Aug 2003 19:05:28 -0000
@@ -27,4 +27,8 @@ extern int foo;

#endif

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
Index: linux-2.6.0-test2-irq/include/asm-v850/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-v850/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-v850/bug.h 30 Jul 2003 00:06:39 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-v850/bug.h 9 Aug 2003 19:05:19 -0000
@@ -27,4 +27,8 @@ extern void __bug (void) __attribute__ (
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif /* __V850_BUG_H__ */
Index: linux-2.6.0-test2-irq/include/asm-x86_64/bug.h
===================================================================
RCS file: /build/cvsroot/linux-2.6.0-test2/include/asm-x86_64/bug.h,v
retrieving revision 1.1.1.1
diff -u -p -B -r1.1.1.1 bug.h
--- linux-2.6.0-test2-irq/include/asm-x86_64/bug.h 30 Jul 2003 00:06:30 -0000 1.1.1.1
+++ linux-2.6.0-test2-irq/include/asm-x86_64/bug.h 9 Aug 2003 19:05:06 -0000
@@ -29,4 +29,8 @@ void out_of_line_bug(void);
} \
} while (0)

+#define WARN_ON_STACK_VAR(ptr) do { \
+ unsigned long __ti = (unsigned long)current_thread_info(); \
+ WARN_ON((__ti & (unsigned long)(ptr)) == __ti); \
+} while (0)
#endif
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