x86/crash: Use set_memory_p() instead of __set_memory_prot()

set_memory_p() is available to use outside of its compilation unit since:

  030ad7a ("x86/mm: Regularize set_memory_p() parameters and make non-static").

There is no use for __set_memory_prot() anymore so drop it too.

  [ bp: Massage commit message. ]

Signed-off-by: Coiby Xu <coxu@redhat.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://patch.msgid.link/20260106095100.656292-1-coxu@redhat.com

Author: coiby

arch/x86/include/asm/set_memory.h

@@ -38,7 +38,6 @@ 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);

arch/x86/kernel/machine_kexec_64.c

@@ -673,10 +673,7 @@ static void kexec_mark_dm_crypt_keys(bool protect)
 		if (protect)
 			set_memory_np((unsigned long)phys_to_virt(start_paddr), nr_pages);
 		else
-			__set_memory_prot(
-				(unsigned long)phys_to_virt(start_paddr),
-				nr_pages,
-				__pgprot(_PAGE_PRESENT | _PAGE_NX | _PAGE_RW));
+			set_memory_p((unsigned long)phys_to_virt(start_paddr), nr_pages);
 	}
 }
 

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)
 {
 	/*