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SubjectRe: Inconsistent "#ifdef __KERNEL__" on different architectures
On Sun, 27 May 2001, Abramo Bagnara wrote:

> Adrian Bunk wrote:
> >
> > while looking for the reason of a build failure of the ALSA libraries on
> > ARM [1] I discovered the following strange thing:
> >
> > On some architectures a function is inside an "#ifdef __KERNEL__" in the
> > header file and on others not. Is there a reason for this or is this
> > inconsistency simply a bug?
>
> This is a bug on some architectures, I've personally fixed this on PPC
> sending a patch to Cort Dougan. It has been included in 2.4.5.
>
> I'd like you send a patch to maintainers (or perhaps to Alan).

I do also explicitely send this mail to the people that seem to be
responsible for the pieces of code I touch.

I'm not sure whether the compete removal of the "#ifdef __KERNEL__"'s is
too rude but there are already other architectures that don't have it in
their architecture specific versions of these files.

A patch for the problems I mentioned (except for parisc) would be:

--- include/asm-arm/atomic.h.old Sun May 27 22:30:58 2001
+++ include/asm-arm/atomic.h Sun May 27 22:58:20 2001
@@ -12,6 +12,7 @@
* 13-04-1997 RMK Made functions atomic!
* 07-12-1997 RMK Upgraded for v2.1.
* 26-08-1998 PJB Added #ifdef __KERNEL__
+ * 27-05-2001 APB Removed #ifdef __KERNEL__
*/
#ifndef __ASM_ARM_ATOMIC_H
#define __ASM_ARM_ATOMIC_H
@@ -30,7 +31,6 @@

#define ATOMIC_INIT(i) { (i) }

-#ifdef __KERNEL__
#include <asm/proc/system.h>

#define atomic_read(v) ((v)->counter)
@@ -107,5 +107,4 @@
__restore_flags(flags);
}

-#endif
#endif
--- include/asm-arm/system.h.old Sun May 27 22:31:47 2001
+++ include/asm-arm/system.h Sun May 27 22:31:56 2001
@@ -1,8 +1,6 @@
#ifndef __ASM_ARM_SYSTEM_H
#define __ASM_ARM_SYSTEM_H

-#ifdef __KERNEL__
-
#include <linux/config.h>
#include <linux/kernel.h>

@@ -84,7 +82,5 @@
#define save_flags_cli(x) __save_flags_cli(x)

#endif /* CONFIG_SMP */
-
-#endif /* __KERNEL__ */

#endif
--- include/asm-sparc/atomic.h.old Sun May 27 22:32:29 2001
+++ include/asm-sparc/atomic.h Sun May 27 22:32:48 2001
@@ -11,7 +11,6 @@

typedef struct { volatile int counter; } atomic_t;

-#ifdef __KERNEL__
#ifndef CONFIG_SMP

#define ATOMIC_INIT(i) { (i) }
@@ -99,7 +98,5 @@
#define atomic_dec(v) ((void)__atomic_sub(1, (v)))

#define atomic_add_negative(i, v) (__atomic_add((i), (v)) < 0)
-
-#endif /* !(__KERNEL__) */

#endif /* !(__ARCH_SPARC_ATOMIC__) */
--- include/asm-sparc/system.h.old Sun May 27 22:32:50 2001
+++ include/asm-sparc/system.h Sun May 27 22:33:52 2001
@@ -33,8 +33,6 @@
ap1000 = 0x07, /* almost a sun4m */
};

-/* Really, userland should not be looking at any of this... */
-#ifdef __KERNEL__

extern enum sparc_cpu sparc_cpu_model;

@@ -335,8 +333,6 @@
}

extern void die_if_kernel(char *str, struct pt_regs *regs) __attribute__ ((noreturn));
-
-#endif /* __KERNEL__ */

#endif /* __ASSEMBLY__ */

--- include/asm-mips/atomic.h.old Sun May 27 22:38:35 2001
+++ include/asm-mips/atomic.h Sun May 27 22:38:48 2001
@@ -24,7 +24,6 @@
typedef struct { int counter; } atomic_t;
#endif

-#ifdef __KERNEL__
#define ATOMIC_INIT(i) { (i) }

#define atomic_read(v) ((v)->counter)
@@ -199,6 +198,5 @@

#define atomic_inc(v) atomic_add(1,(v))
#define atomic_dec(v) atomic_sub(1,(v))
-#endif /* defined(__KERNEL__) */

#endif /* __ASM_MIPS_ATOMIC_H */
--- include/asm-mips64/atomic.h.old Sun May 27 22:38:53 2001
+++ include/asm-mips64/atomic.h Sun May 27 22:39:02 2001
@@ -18,7 +18,6 @@

typedef struct { volatile int counter; } atomic_t;

-#ifdef __KERNEL__
#define ATOMIC_INIT(i) { (i) }

#define atomic_read(v) ((v)->counter)
@@ -99,6 +98,5 @@

#define atomic_inc(v) atomic_add(1,(v))
#define atomic_dec(v) atomic_sub(1,(v))
-#endif /* defined(__KERNEL__) */

#endif /* _ASM_ATOMIC_H */

cu
Adrian

--
A "No" uttered from deepest conviction is better and greater than a
"Yes" merely uttered to please, or what is worse, to avoid trouble.
-- Mahatma Ghandi


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