From 748e4f3d702def1a4bff191e0cf93b6a05340f01 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:41:34 +0000
Subject: [PATCH] add gpio led uart
---
kernel/arch/xtensa/include/asm/pgalloc.h | 60 ++++++++++++++++++++++--------------------------------------
1 files changed, 22 insertions(+), 38 deletions(-)
diff --git a/kernel/arch/xtensa/include/asm/pgalloc.h b/kernel/arch/xtensa/include/asm/pgalloc.h
index 1065bc8..d3a22da 100644
--- a/kernel/arch/xtensa/include/asm/pgalloc.h
+++ b/kernel/arch/xtensa/include/asm/pgalloc.h
@@ -1,9 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* include/asm-xtensa/pgalloc.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*
* Copyright (C) 2001-2007 Tensilica Inc.
*/
@@ -11,10 +8,13 @@
#ifndef _XTENSA_PGALLOC_H
#define _XTENSA_PGALLOC_H
-#ifdef __KERNEL__
-
+#ifdef CONFIG_MMU
#include <linux/highmem.h>
#include <linux/slab.h>
+
+#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
+#define __HAVE_ARCH_PTE_ALLOC_ONE
+#include <asm-generic/pgalloc.h>
/*
* Allocating and freeing a pmd is trivial: the 1-entry pmd is
@@ -33,53 +33,37 @@
return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
}
-static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+static inline void ptes_clear(pte_t *ptep)
{
- free_page((unsigned long)pgd);
-}
-
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
- unsigned long address)
-{
- pte_t *ptep;
int i;
- ptep = (pte_t *)__get_free_page(GFP_KERNEL);
+ for (i = 0; i < PTRS_PER_PTE; i++)
+ pte_clear(NULL, 0, ptep + i);
+}
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
+{
+ pte_t *ptep;
+
+ ptep = (pte_t *)__pte_alloc_one_kernel(mm);
if (!ptep)
return NULL;
- for (i = 0; i < 1024; i++)
- pte_clear(NULL, 0, ptep + i);
+ ptes_clear(ptep);
return ptep;
}
-static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
- unsigned long addr)
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
{
- pte_t *pte;
struct page *page;
- pte = pte_alloc_one_kernel(mm, addr);
- if (!pte)
+ page = __pte_alloc_one(mm, GFP_PGTABLE_USER);
+ if (!page)
return NULL;
- page = virt_to_page(pte);
- if (!pgtable_page_ctor(page)) {
- __free_page(page);
- return NULL;
- }
+ ptes_clear(page_address(page));
return page;
}
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
- free_page((unsigned long)pte);
-}
-
-static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
-{
- pgtable_page_dtor(pte);
- __free_page(pte);
-}
#define pmd_pgtable(pmd) pmd_page(pmd)
+#endif /* CONFIG_MMU */
-#endif /* __KERNEL__ */
#endif /* _XTENSA_PGALLOC_H */
--
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