[v2,2/2] um: Rename _PAGE_NEWPAGE to _PAGE_NEEDSYNC

Message ID	20241011102354.1682626-3-tiwei.btw@antgroup.com
State	Accepted
Headers	show Return-Path: <linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org> From: "Tiwei Bie" <tiwei.btw@antgroup.com> To: richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net Cc: <linux-um@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <benjamin@sipsolutions.net>, "Tiwei Bie" <tiwei.btw@antgroup.com>, "Benjamin Berg" <benjamin.berg@intel.com> Subject: [PATCH v2 2/2] um: Rename _PAGE_NEWPAGE to _PAGE_NEEDSYNC Date: Fri, 11 Oct 2024 18:23:54 +0800 Message-Id: <20241011102354.1682626-3-tiwei.btw@antgroup.com> In-Reply-To: <20241011102354.1682626-1-tiwei.btw@antgroup.com> References: <20241011102354.1682626-1-tiwei.btw@antgroup.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit preview: The _PAGE_NEWPAGE bit does not really indicate that this is a new page, but rather whether this entry needs to be synced or not. Renaming it to _PAGE_NEEDSYNC will make it more clear how everything ti [...] Content analysis details: (-2.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 RCVD_IN_VALIDITY_SAFE_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [140.205.0.203 listed in sa-accredit.habeas.com] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [140.205.0.203 listed in list.dnswl.org] 0.0 RCVD_IN_VALIDITY_CERTIFIED_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [140.205.0.203 listed in sa-trusted.bondedsender.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.0 RCVD_IN_VALIDITY_RPBL_BLOCKED RBL: ADMINISTRATOR NOTICE: The query to Validity was blocked. See https://knowledge.validity.com/hc/en-us/articles/20961730681243 for more information. [140.205.0.203 listed in bl.score.senderscore.com] 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines Precedence: list Sender: "linux-um" <linux-um-bounces@lists.infradead.org> Errors-To: linux-um-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org
Series	um: Some page bit cleanups \| expand [v2,0/2] um: Some page bit cleanups [v2,1/2] um: Abandon the _PAGE_NEWPROT bit [v2,2/2] um: Rename _PAGE_NEWPAGE to _PAGE_NEEDSYNC

diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h index f0ad80fc8c10..99aa459c7c6c 100644 --- a/arch/um/include/asm/page.h +++ b/arch/um/include/asm/page.h @@ -56,7 +56,7 @@ typedef struct { unsigned long pud; } pud_t; #define pte_set_bits(p, bits) ((p).pte |= (bits)) #define pte_clear_bits(p, bits) ((p).pte &= ~(bits)) #define pte_copy(to, from) ((to).pte = (from).pte) -#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE)) +#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEEDSYNC)) #define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot)) typedef unsigned long phys_t; diff --git a/arch/um/include/asm/pgtable-2level.h b/arch/um/include/asm/pgtable-2level.h index 8256ecc5b919..ab0c8dd86564 100644 --- a/arch/um/include/asm/pgtable-2level.h +++ b/arch/um/include/asm/pgtable-2level.h @@ -31,7 +31,7 @@ printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \ pgd_val(e)) -static inline int pgd_newpage(pgd_t pgd) { return 0; } +static inline int pgd_needsync(pgd_t pgd) { return 0; } static inline void pgd_mkuptodate(pgd_t pgd) { } #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) diff --git a/arch/um/include/asm/pgtable-4level.h b/arch/um/include/asm/pgtable-4level.h index f912fcc16b7a..0d279caee93c 100644 --- a/arch/um/include/asm/pgtable-4level.h +++ b/arch/um/include/asm/pgtable-4level.h @@ -55,7 +55,7 @@ printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \ pgd_val(e)) -#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE)) +#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEEDSYNC)) #define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) #define pud_present(x) (pud_val(x) & _PAGE_PRESENT) #define pud_populate(mm, pud, pmd) \ @@ -63,7 +63,7 @@ #define set_pud(pudptr, pudval) (*(pudptr) = (pudval)) -#define p4d_none(x) (!(p4d_val(x) & ~_PAGE_NEWPAGE)) +#define p4d_none(x) (!(p4d_val(x) & ~_PAGE_NEEDSYNC)) #define p4d_bad(x) ((p4d_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) #define p4d_present(x) (p4d_val(x) & _PAGE_PRESENT) #define p4d_populate(mm, p4d, pud) \ @@ -72,23 +72,23 @@ #define set_p4d(p4dptr, p4dval) (*(p4dptr) = (p4dval)) -static inline int pgd_newpage(pgd_t pgd) +static inline int pgd_needsync(pgd_t pgd) { - return(pgd_val(pgd) & _PAGE_NEWPAGE); + return pgd_val(pgd) & _PAGE_NEEDSYNC; } -static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; } +static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEEDSYNC; } #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) static inline void pud_clear (pud_t *pud) { - set_pud(pud, __pud(_PAGE_NEWPAGE)); + set_pud(pud, __pud(_PAGE_NEEDSYNC)); } static inline void p4d_clear (p4d_t *p4d) { - set_p4d(p4d, __p4d(_PAGE_NEWPAGE)); + set_p4d(p4d, __p4d(_PAGE_NEEDSYNC)); } #define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK) diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h index 6b1317400190..12bfc58a8580 100644 --- a/arch/um/include/asm/pgtable.h +++ b/arch/um/include/asm/pgtable.h @@ -11,7 +11,7 @@ #include <asm/fixmap.h> #define _PAGE_PRESENT 0x001 -#define _PAGE_NEWPAGE 0x002 +#define _PAGE_NEEDSYNC 0x002 #define _PAGE_RW 0x020 #define _PAGE_USER 0x040 #define _PAGE_ACCESSED 0x080 @@ -79,22 +79,22 @@ extern unsigned long end_iomem; */ #define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page) -#define pte_clear(mm,addr,xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEWPAGE)) +#define pte_clear(mm, addr, xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEEDSYNC)) -#define pmd_none(x) (!((unsigned long)pmd_val(x) & ~_PAGE_NEWPAGE)) +#define pmd_none(x) (!((unsigned long)pmd_val(x) & ~_PAGE_NEEDSYNC)) #define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) -#define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEWPAGE; } while (0) +#define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEEDSYNC; } while (0) -#define pmd_newpage(x) (pmd_val(x) & _PAGE_NEWPAGE) -#define pmd_mkuptodate(x) (pmd_val(x) &= ~_PAGE_NEWPAGE) +#define pmd_needsync(x) (pmd_val(x) & _PAGE_NEEDSYNC) +#define pmd_mkuptodate(x) (pmd_val(x) &= ~_PAGE_NEEDSYNC) -#define pud_newpage(x) (pud_val(x) & _PAGE_NEWPAGE) -#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEWPAGE) +#define pud_needsync(x) (pud_val(x) & _PAGE_NEEDSYNC) +#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEEDSYNC) -#define p4d_newpage(x) (p4d_val(x) & _PAGE_NEWPAGE) -#define p4d_mkuptodate(x) (p4d_val(x) &= ~_PAGE_NEWPAGE) +#define p4d_needsync(x) (p4d_val(x) & _PAGE_NEEDSYNC) +#define p4d_mkuptodate(x) (p4d_val(x) &= ~_PAGE_NEEDSYNC) #define pmd_pfn(pmd) (pmd_val(pmd) >> PAGE_SHIFT) #define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK) @@ -145,9 +145,9 @@ static inline int pte_young(pte_t pte) return pte_get_bits(pte, _PAGE_ACCESSED); } -static inline int pte_newpage(pte_t pte) +static inline int pte_needsync(pte_t pte) { - return pte_get_bits(pte, _PAGE_NEWPAGE); + return pte_get_bits(pte, _PAGE_NEEDSYNC); } /* @@ -200,13 +200,13 @@ static inline pte_t pte_mkwrite_novma(pte_t pte) static inline pte_t pte_mkuptodate(pte_t pte) { - pte_clear_bits(pte, _PAGE_NEWPAGE); + pte_clear_bits(pte, _PAGE_NEEDSYNC); return pte; } -static inline pte_t pte_mknewpage(pte_t pte) +static inline pte_t pte_mkneedsync(pte_t pte) { - pte_set_bits(pte, _PAGE_NEWPAGE); + pte_set_bits(pte, _PAGE_NEEDSYNC); return(pte); } @@ -214,11 +214,11 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval) { pte_copy(*pteptr, pteval); - /* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so + /* If it's a swap entry, it needs to be marked _PAGE_NEEDSYNC so * update_pte_range knows to unmap it. */ - *pteptr = pte_mknewpage(*pteptr); + *pteptr = pte_mkneedsync(*pteptr); } #define PFN_PTE_SHIFT PAGE_SHIFT @@ -258,7 +258,7 @@ static inline void set_ptes(struct mm_struct *mm, unsigned long addr, #define __HAVE_ARCH_PTE_SAME static inline int pte_same(pte_t pte_a, pte_t pte_b) { - return !((pte_val(pte_a) ^ pte_val(pte_b)) & ~_PAGE_NEWPAGE); + return !((pte_val(pte_a) ^ pte_val(pte_b)) & ~_PAGE_NEEDSYNC); } /* @@ -308,7 +308,7 @@ extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr); * <--------------- offset ----------------> E < type -> 0 0 0 1 0 * * E is the exclusive marker that is not stored in swap entries. - * _PAGE_NEWPAGE (bit 1) is always set to 1 in set_pte(). + * _PAGE_NEEDSYNC (bit 1) is always set to 1 in set_pte(). */ #define __swp_type(x) (((x).val >> 5) & 0x1f) #define __swp_offset(x) ((x).val >> 11) diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index 23c1f550cd7c..cf7e0d4407f2 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -57,7 +57,7 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr, pte = pte_offset_kernel(pmd, addr); do { - if (!pte_newpage(*pte)) + if (!pte_needsync(*pte)) continue; if (pte_present(*pte)) { @@ -101,7 +101,7 @@ static inline int update_pmd_range(pud_t *pud, unsigned long addr, do { next = pmd_addr_end(addr, end); if (!pmd_present(*pmd)) { - if (pmd_newpage(*pmd)) { + if (pmd_needsync(*pmd)) { ret = ops->unmap(ops->mm_idp, addr, next - addr); pmd_mkuptodate(*pmd); @@ -124,7 +124,7 @@ static inline int update_pud_range(p4d_t *p4d, unsigned long addr, do { next = pud_addr_end(addr, end); if (!pud_present(*pud)) { - if (pud_newpage(*pud)) { + if (pud_needsync(*pud)) { ret = ops->unmap(ops->mm_idp, addr, next - addr); pud_mkuptodate(*pud); @@ -147,7 +147,7 @@ static inline int update_p4d_range(pgd_t *pgd, unsigned long addr, do { next = p4d_addr_end(addr, end); if (!p4d_present(*p4d)) { - if (p4d_newpage(*p4d)) { + if (p4d_needsync(*p4d)) { ret = ops->unmap(ops->mm_idp, addr, next - addr); p4d_mkuptodate(*p4d); @@ -181,7 +181,7 @@ int um_tlb_sync(struct mm_struct *mm) do { next = pgd_addr_end(addr, mm->context.sync_tlb_range_to); if (!pgd_present(*pgd)) { - if (pgd_newpage(*pgd)) { + if (pgd_needsync(*pgd)) { ret = ops.unmap(ops.mm_idp, addr, next - addr); pgd_mkuptodate(*pgd);

[v2,2/2] um: Rename _PAGE_NEWPAGE to _PAGE_NEEDSYNC

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