char/agp: introduce asm-generic/agp.h

There are several architectures that duplicate definitions of
map_page_into_agp(), unmap_page_from_agp() and flush_agp_cache().

Define those in asm-generic/agp.h and use it instead of duplicated
per-architecture headers.

Signed-off-by: Mike Rapoport (IBM) <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

Author: rppt

arch/alpha/include/asm/Kbuild

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 generated-y += syscall_table.h
+generic-y += agp.h
 generic-y += export.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h

arch/alpha/include/asm/agp.h

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 generated-y += syscall_table.h
+generic-y += agp.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += vtime.h

arch/ia64/include/asm/Kbuild

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 generated-y += syscall_table_32.h
 generated-y += syscall_table_64.h
+generic-y += agp.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += user.h

arch/ia64/include/asm/agp.h

@@ -2,6 +2,7 @@
 generated-y += syscall_table_32.h
 generated-y += syscall_table_64.h
 generated-y += syscall_table_spu.h
+generic-y += agp.h
 generic-y += export.h
 generic-y += kvm_types.h
 generic-y += mcs_spinlock.h

arch/parisc/include/asm/Kbuild

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 generated-y += syscall_table_32.h
 generated-y += syscall_table_64.h
+generic-y += agp.h
 generic-y += export.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h

arch/parisc/include/asm/agp.h

@@ -1,13 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_POWERPC_AGP_H
-#define _ASM_POWERPC_AGP_H
-#ifdef __KERNEL__
+#ifndef _ASM_GENERIC_AGP_H
+#define _ASM_GENERIC_AGP_H
 
 #include <asm/io.h>
 
 #define map_page_into_agp(page) do {} while (0)
 #define unmap_page_from_agp(page) do {} while (0)
 #define flush_agp_cache() mb()
 
-#endif /* __KERNEL__ */
-#endif	/* _ASM_POWERPC_AGP_H */
+#endif	/* _ASM_GENERIC_AGP_H */