include/asm-generic/pgtable-nopud.h

Source file repositories/reference/linux-study-clean/include/asm-generic/pgtable-nopud.h

File Facts

System
Linux kernel
Corpus path
include/asm-generic/pgtable-nopud.h
Extension
.h
Size
1995 bytes
Lines
67
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

static inline int p4d_none(p4d_t p4d)		{ return 0; }
static inline int p4d_bad(p4d_t p4d)		{ return 0; }
static inline int p4d_present(p4d_t p4d)	{ return 1; }
static inline void p4d_clear(p4d_t *p4d)	{ }
#define pud_ERROR(pud)				(p4d_ERROR((pud).p4d))

#define p4d_populate(mm, p4d, pud)		do { } while (0)
#define p4d_populate_safe(mm, p4d, pud)		do { } while (0)
/*
 * (puds are folded into p4ds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */
#define set_p4d(p4dptr, p4dval)	set_pud((pud_t *)(p4dptr), (pud_t) { p4dval })

static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address)
{
	return (pud_t *)p4d;
}
#define pud_offset pud_offset

#define pud_val(x)				(p4d_val((x).p4d))
#define __pud(x)				((pud_t) { __p4d(x) })

#define p4d_page(p4d)				(pud_page((pud_t){ p4d }))
#define p4d_pgtable(p4d)			((pud_t *)(pud_pgtable((pud_t){ p4d })))

/*
 * allocating and freeing a pud is trivial: the 1-entry pud is
 * inside the p4d, so has no extra memory associated with it.
 */
#define pud_alloc_one(mm, address)		NULL
#define pud_free(mm, x)				do { } while (0)
#define pud_free_tlb(tlb, x, a)		        do { } while (0)

#undef  pud_addr_end
#define pud_addr_end(addr, end)			(end)

#endif /* __ASSEMBLY__ */
#endif /* _PGTABLE_NOPUD_H */

Annotation

Implementation Notes