linux-kernel - [PATCH 2/2] Reapply "x86/mm: Remove unused __set_memory

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Message-ID: <20260106095100.656292-2-coxu@redhat.com>
Date: Tue,  6 Jan 2026 17:50:59 +0800
From: Coiby Xu <coxu@...hat.com>
To: kexec@...ts.infradead.org,
	x86@...nel.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andy Lutomirski <luto@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT))
Subject: [PATCH 2/2] Reapply "x86/mm: Remove unused __set_memory_prot()"

This reverts commit e1e6cd01d93359e22be84a23c8bb24ee4e04e142 as
__set_memory_prot is unsued (again) after set_memory_p is used instead
for x86_64 kdump LUKS support (CONFIG_CRASH_DM_CRYPT).

Signed-off-by: Coiby Xu <coxu@...hat.com>
---
 arch/x86/include/asm/set_memory.h |  2 --
 arch/x86/mm/pat/set_memory.c      | 13 -------------
 2 files changed, 15 deletions(-)

diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index 61f56cdaccb5..8d9f1c9aaa4c 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -4,7 +4,6 @@
 
 #include <asm/page.h>
 #include <asm-generic/set_memory.h>
-#include <asm/pgtable.h>
 
 #define set_memory_rox set_memory_rox
 int set_memory_rox(unsigned long addr, int numpages);
@@ -38,7 +37,6 @@ int set_memory_rox(unsigned long addr, int numpages);
  * The caller is required to take care of these.
  */
 
-int __set_memory_prot(unsigned long addr, int numpages, pgprot_t prot);
 int _set_memory_uc(unsigned long addr, int numpages);
 int _set_memory_wc(unsigned long addr, int numpages);
 int _set_memory_wt(unsigned long addr, int numpages);
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c
index 6c6eb486f7a6..40581a720fe8 100644
--- a/arch/x86/mm/pat/set_memory.c
+++ b/arch/x86/mm/pat/set_memory.c
@@ -2145,19 +2145,6 @@ static inline int cpa_clear_pages_array(struct page **pages, int numpages,
 		CPA_PAGES_ARRAY, pages);
 }
 
-/*
- * __set_memory_prot is an internal helper for callers that have been passed
- * a pgprot_t value from upper layers and a reservation has already been taken.
- * If you want to set the pgprot to a specific page protocol, use the
- * set_memory_xx() functions.
- */
-int __set_memory_prot(unsigned long addr, int numpages, pgprot_t prot)
-{
-	return change_page_attr_set_clr(&addr, numpages, prot,
-					__pgprot(~pgprot_val(prot)), 0, 0,
-					NULL);
-}
-
 int _set_memory_uc(unsigned long addr, int numpages)
 {
 	/*
-- 
2.52.0