sparc32: Fix version generation failed warnings

An allmodconfig build of sparc32 resulted in several warnings:

WARNING: modpost: EXPORT symbol "empty_zero_page" [vmlinux] version generation failed, symbol will not be versioned.
Is "empty_zero_page" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__udelay" [vmlinux] version generation failed, symbol will not be versioned.
Is "__udelay" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__ndelay" [vmlinux] version generation failed, symbol will not be versioned.
Is "__ndelay" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__ashldi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__ashldi3" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__ashrdi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__ashrdi3" prototyped in <asm/asm-prototypes.h>?
WARNING: modpost: EXPORT symbol "__lshrdi3" [vmlinux] version generation failed, symbol will not be versioned.
Is "__lshrdi3" prototyped in <asm/asm-prototypes.h>?

And later a lot of warnings like this:
WARNING: modpost: "__udelay" [kernel/locking/locktorture.ko] has no CRC!
WARNING: modpost: "__udelay" [kernel/rcu/rcutorture.ko] has no CRC!
WARNING: modpost: "__udelay" [kernel/rcu/rcuscale.ko] has no CRC!
WARNING: modpost: "__udelay" [kernel/rcu/refscale.ko] has no CRC!
WARNING: modpost: "__ndelay" [kernel/rcu/refscale.ko] has no CRC!
WARNING: modpost: "__udelay" [kernel/time/test_udelay.ko] has no CRC!
WARNING: modpost: "__udelay" [kernel/scftorture.ko] has no CRC!
WARNING: modpost: "__ashrdi3" [fs/quota/quota_tree.ko] has no CRC!
WARNING: modpost: "__ashldi3" [fs/ext4/ext4.ko] has no CRC!

The fix was, as hinted, to add missing prototypes to asm-prototypes.h.

For the __*di3 functions add the prototypes direct to the
asm-prototypes.h file.
Some of the symbols were already declared, so pulled in the relevant
headers (delay.h, pgtable.h).
The include files was alphabetically sorted to make the list somehow
readable.

The .S files exporting the symbols do not include asm-prototypes.h,
so they need to be explicit rebuild to generate symbol versioning.
One or more of the generic headers pulled in by asm-prototypes.h
did not support being used from .S files, so adding asm-prototypes.h
as an include file was not an option.

Signed-off-by: Sam Ravnborg <[email protected]>
Cc: Andreas Larsson <[email protected]>
Cc: David S. Miller <[email protected]>
Reviewed-by: Andreas Larsson <[email protected]>
Tested-by: Andreas Larsson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Larsson <[email protected]>

Author: sravnborg

arch/sparc/include/asm/asm-prototypes.h

@@ -3,15 +3,18 @@
  * Copyright (c) 2017 Oracle and/or its affiliates. All rights reserved.
  */
 
-#include <asm/xor.h>
-#include <asm/checksum.h>
-#include <asm/trap_block.h>
+#include <linux/atomic.h>
 #include <linux/uaccess.h>
+
 #include <asm/atomic.h>
-#include <asm/ftrace.h>
 #include <asm/cacheflush.h>
+#include <asm/checksum.h>
+#include <asm/delay.h>
+#include <asm/ftrace.h>
 #include <asm/oplib.h>
-#include <linux/atomic.h>
+#include <asm/pgtable.h>
+#include <asm/trap_block.h>
+#include <asm/xor.h>
 
 void *__memscan_zero(void *, size_t);
 void *__memscan_generic(void *, int, size_t);
@@ -23,3 +26,7 @@ void *memcpy(void *dest, const void *src, size_t n);
 void *memset(void *s, int c, size_t n);
 typedef int TItype __attribute__((mode(TI)));
 TItype __multi3(TItype a, TItype b);
+
+s64 __ashldi3(s64, int);
+s64 __lshrdi3(s64, int);
+s64 __ashrdi3(s64, int);