cregit-Linux how code gets into the kernel

Release 4.12 include/asm-generic/pgtable-nopud.h

#ifndef _PGTABLE_NOPUD_H

#define _PGTABLE_NOPUD_H

#ifndef __ASSEMBLY__

#ifdef __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nop4d-hack.h>
#else
#include <asm-generic/pgtable-nop4d.h>


#define __PAGETABLE_PUD_FOLDED

/*
 * Having the pud type consist of a p4d gets the size right, and allows
 * us to conceptually access the p4d entry that this pud is folded into
 * without casting.
 */


typedef struct { p4d_t p4d; } pud_t;


#define PUD_SHIFT	P4D_SHIFT

#define PTRS_PER_PUD	1

#define PUD_SIZE  	(1UL << PUD_SHIFT)

#define PUD_MASK  	(~(PUD_SIZE-1))

/*
 * The "p4d_xxx()" functions here are trivial for a folded two-level
 * setup: the pud is never bad, and a pud always exists (as it's folded
 * into the p4d entry)
 */

static inline int p4d_none(p4d_t p4d) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin1076.92%150.00%
Kirill A. Shutemov323.08%150.00%
Total13100.00%2100.00%


static inline int p4d_bad(p4d_t p4d) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin1076.92%150.00%
Kirill A. Shutemov323.08%150.00%
Total13100.00%2100.00%


static inline int p4d_present(p4d_t p4d) { return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin1076.92%150.00%
Kirill A. Shutemov323.08%150.00%
Total13100.00%2100.00%


static inline void p4d_clear(p4d_t *p4d) { }

Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin770.00%150.00%
Kirill A. Shutemov330.00%150.00%
Total10100.00%2100.00%

#define pud_ERROR(pud) (p4d_ERROR((pud).p4d)) #define p4d_populate(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; }

Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin2086.96%150.00%
Kirill A. Shutemov313.04%150.00%
Total23100.00%2100.00%

#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_page_vaddr(p4d) (pud_page_vaddr((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 /* !__ARCH_USE_5LEVEL_HACK */ #endif /* _PGTABLE_NOPUD_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin15969.43%116.67%
Kirill A. Shutemov5122.27%233.33%
Hugh Dickins156.55%116.67%
Benjamin Herrenschmidt41.75%233.33%
Total229100.00%6100.00%
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