Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=56744546b3e5379177a70e7306c6283f727e4732
Commit: 56744546b3e5379177a70e7306c6283f727e4732
Parent: ff31452b6ea5032f26f16140d45dc6596260cd9c
Author: Thomas Gleixner <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:34:08 2008 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:34:08 2008 +0100
x86: cpa use the new set_clr function
Convert cpa_set and cpa_clear to call the new set_clr function.
Seperate out the debug helpers.
Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
arch/x86/mm/pageattr.c | 126 ++++++++----------------------------------------
1 files changed, 20 insertions(+), 106 deletions(-)
diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index c54832b..7823ada 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -321,116 +321,16 @@ static int change_page_attr_set_clr(unsigned long addr,
int numpages,
return ret;
}
-/**
- * change_page_attr_set - Change page table attributes in the linear mapping.
- * @addr: Virtual address in linear mapping.
- * @numpages: Number of pages to change
- * @prot: Protection/caching type bits to set (PAGE_*)
- *
- * Returns 0 on success, otherwise a negated errno.
- *
- * This should be used when a page is mapped with a different caching policy
- * than write-back somewhere - some CPUs do not like it when mappings with
- * different caching policies exist. This changes the page attributes of the
- * in kernel linear mapping too.
- *
- * The caller needs to ensure that there are no conflicting mappings elsewhere
- * (e.g. in user space) * This function only deals with the kernel linear map.
- *
- * This function is different from change_page_attr() in that only selected
bits
- * are impacted, all other bits remain as is.
- */
-static int __change_page_attr_set(unsigned long addr, int numpages,
- pgprot_t prot)
+static inline int change_page_attr_set(unsigned long addr, int numpages,
+ pgprot_t mask)
{
- pgprot_t current_prot, new_prot;
- int level;
- pte_t *pte;
- int i, ret;
-
- for (i = 0; i < numpages ; i++) {
-
- pte = lookup_address(addr, &level);
- if (!pte)
- return -EINVAL;
-
- current_prot = pte_pgprot(*pte);
-
- pgprot_val(new_prot) =
- pgprot_val(current_prot) | pgprot_val(prot);
-
- ret = change_page_attr_addr(addr, new_prot);
- if (ret)
- return ret;
- addr += PAGE_SIZE;
- }
-
- return 0;
+ return change_page_attr_set_clr(addr, numpages, mask, __pgprot(0));
}
-static int change_page_attr_set(unsigned long addr, int numpages, pgprot_t
prot)
+static inline int change_page_attr_clear(unsigned long addr, int numpages,
+ pgprot_t mask)
{
- int ret = __change_page_attr_set(addr, numpages, prot);
-
- global_flush_tlb();
- return ret;
-
-}
-
-/**
- * change_page_attr_clear - Change page table attributes in the linear mapping.
- * @addr: Virtual address in linear mapping.
- * @numpages: Number of pages to change
- * @prot: Protection/caching type bits to clear (PAGE_*)
- *
- * Returns 0 on success, otherwise a negated errno.
- *
- * This should be used when a page is mapped with a different caching policy
- * than write-back somewhere - some CPUs do not like it when mappings with
- * different caching policies exist. This changes the page attributes of the
- * in kernel linear mapping too.
- *
- * The caller needs to ensure that there are no conflicting mappings elsewhere
- * (e.g. in user space) * This function only deals with the kernel linear map.
- *
- * This function is different from change_page_attr() in that only selected
bits
- * are impacted, all other bits remain as is.
- */
-static int __change_page_attr_clear(unsigned long addr, int numpages,
- pgprot_t prot)
-{
- pgprot_t current_prot, new_prot;
- int level;
- pte_t *pte;
- int i, ret;
-
- for (i = 0; i < numpages; i++) {
-
- pte = lookup_address(addr, &level);
- if (!pte)
- return -EINVAL;
-
- current_prot = pte_pgprot(*pte);
-
- pgprot_val(new_prot) =
- pgprot_val(current_prot) & ~pgprot_val(prot);
-
- ret = change_page_attr_addr(addr, new_prot);
- if (ret)
- return ret;
- addr += PAGE_SIZE;
- }
-
- return 0;
-}
-
-static int change_page_attr_clear(unsigned long addr, int numpages,
- pgprot_t prot)
-{
- int ret = __change_page_attr_clear(addr, numpages, prot);
-
- global_flush_tlb();
- return ret;
+ return __change_page_attr_set_clr(addr, numpages, __pgprot(0), mask);
}
@@ -522,6 +422,20 @@ int set_pages_rw(struct page *page, int numpages)
}
+#if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_CPA_DEBUG)
+static inline int __change_page_attr_set(unsigned long addr, int numpages,
+ pgprot_t mask)
+{
+ return __change_page_attr_set_clr(addr, numpages, mask, __pgprot(0));
+}
+
+static inline int __change_page_attr_clear(unsigned long addr, int numpages,
+ pgprot_t mask)
+{
+ return __change_page_attr_set_clr(addr, numpages, __pgprot(0), mask);
+}
+#endif
+
#ifdef CONFIG_DEBUG_PAGEALLOC
static int __set_pages_p(struct page *page, int numpages)
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
