mm: replace __ASSEMBLY__ with __ASSEMBLER__ in memory management header files

While the GCC and Clang compilers already define __ASSEMBLER__
automatically when compiling assembly code, __ASSEMBLY__ is a macro that
only gets defined by the Makefiles in the kernel.  This can be very
confusing when switching between userspace and kernelspace coding, or when
dealing with uapi headers that rather should use __ASSEMBLER__ instead. 
So let's standardize now on the __ASSEMBLER__ macro that is provided by
the compilers.

This is a completely mechanical patch (done with a simple "sed -i"
statement).

Link: https://lore.kernel.org/20260619131830.229804-1-thuth@redhat.com
Signed-off-by: Thomas Huth <thuth@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Kairui Song <kasong@tencent.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/asm-generic/fixmap.h

@@ -21,7 +21,7 @@
 #define __fix_to_virt(x)	(FIXADDR_TOP - ((x) << PAGE_SHIFT))
 #define __virt_to_fix(x)	((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 /*
  * 'index to address' translation. If anyone tries to use the idx
  * directly without translation, we catch the bug with a NULL-deference
@@ -97,5 +97,5 @@ static inline unsigned long virt_to_fix(const unsigned long vaddr)
 #define set_fixmap_io(idx, phys) \
 	__set_fixmap(idx, phys, FIXMAP_PAGE_IO)
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* __ASM_GENERIC_FIXMAP_H */

include/asm-generic/getorder.h

@@ -2,7 +2,7 @@
 #ifndef __ASM_GENERIC_GETORDER_H
 #define __ASM_GENERIC_GETORDER_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <linux/compiler.h>
 #include <linux/log2.h>
@@ -47,6 +47,6 @@ static __always_inline __attribute_const__ int get_order(unsigned long size)
 #endif
 }
 
-#endif	/* __ASSEMBLY__ */
+#endif	/* __ASSEMBLER__ */
 
 #endif	/* __ASM_GENERIC_GETORDER_H */

include/asm-generic/memory_model.h

@@ -4,7 +4,7 @@
 
 #include <linux/pfn.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 /*
  * supports 3 memory models.
@@ -86,6 +86,6 @@ static inline int pfn_valid(unsigned long pfn)
 #endif /* CONFIG_DEBUG_VIRTUAL */
 #define phys_to_page(phys)	pfn_to_page(PHYS_PFN(phys))
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif

include/asm-generic/mmu.h

@@ -6,7 +6,7 @@
  * This is the mmu.h header for nommu implementations.
  * Architectures with an MMU need something more complex.
  */
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 typedef struct {
 	unsigned long		end_brk;
 

include/asm-generic/pgtable-nop4d.h

@@ -2,7 +2,7 @@
 #ifndef _PGTABLE_NOP4D_H
 #define _PGTABLE_NOP4D_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #define __PAGETABLE_P4D_FOLDED 1
 
@@ -54,5 +54,5 @@ static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
 #undef  p4d_addr_end
 #define p4d_addr_end(addr, end)			(end)
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _PGTABLE_NOP4D_H */

include/asm-generic/pgtable-nopmd.h

@@ -2,7 +2,7 @@
 #ifndef _PGTABLE_NOPMD_H
 #define _PGTABLE_NOPMD_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <asm-generic/pgtable-nopud.h>
 
@@ -68,6 +68,6 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
 #undef  pmd_addr_end
 #define pmd_addr_end(addr, end)			(end)
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 
 #endif /* _PGTABLE_NOPMD_H */

include/asm-generic/pgtable-nopud.h

@@ -2,7 +2,7 @@
 #ifndef _PGTABLE_NOPUD_H
 #define _PGTABLE_NOPUD_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 
 #include <asm-generic/pgtable-nop4d.h>
 
@@ -62,5 +62,5 @@ static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address)
 #undef  pud_addr_end
 #define pud_addr_end(addr, end)			(end)
 
-#endif /* __ASSEMBLY__ */
+#endif /* __ASSEMBLER__ */
 #endif /* _PGTABLE_NOPUD_H */

include/linux/mmzone.h

@@ -2,7 +2,7 @@
 #ifndef _LINUX_MMZONE_H
 #define _LINUX_MMZONE_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #ifndef __GENERATING_BOUNDS_H
 
 #include <linux/spinlock.h>
@@ -2389,5 +2389,5 @@ static inline unsigned long next_present_section_nr(unsigned long section_nr)
 #endif
 
 #endif /* !__GENERATING_BOUNDS.H */
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 #endif /* _LINUX_MMZONE_H */

include/linux/pfn.h

@@ -2,7 +2,7 @@
 #ifndef _LINUX_PFN_H_
 #define _LINUX_PFN_H_
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #include <linux/types.h>
 #endif
 

include/linux/pgtable.h

@@ -8,7 +8,7 @@
 #define PMD_ORDER	(PMD_SHIFT - PAGE_SHIFT)
 #define PUD_ORDER	(PUD_SHIFT - PAGE_SHIFT)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #ifdef CONFIG_MMU
 
 #include <linux/mm_types.h>
@@ -2320,7 +2320,7 @@ static inline const char *pgtable_level_to_str(enum pgtable_level level)
 	}
 }
 
-#endif /* !__ASSEMBLY__ */
+#endif /* !__ASSEMBLER__ */
 
 #if !defined(MAX_POSSIBLE_PHYSMEM_BITS) && !defined(CONFIG_64BIT)
 #ifdef CONFIG_PHYS_ADDR_T_64BIT