Merge tag 'powerpc-6.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Madhavan Srinivasan:

 - fix to handle patchable function entries during module load

 - fix to align vmemmap start to page size

 - fixes to handle compilation errors and warnings

Thanks to Anthony Iliopoulos, Donet Tom, Ritesh Harjani (IBM), Venkat
Rao Bagalkote, and Stephen Rothwell.

* tag 'powerpc-6.15-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/boot: Fix dash warning
  powerpc/boot: Check for ld-option support
  powerpc: Add check to select PPC_RADIX_BROADCAST_TLBIE
  powerpc64/ftrace: fix module loading without patchable function entries
  book3s64/radix : Align section vmemmap start address to PAGE_SIZE
  book3s64/radix: Fix compile errors when CONFIG_ARCH_WANT_OPTIMIZE_DAX_VMEMMAP=n

Author: torvalds

arch/powerpc/boot/wrapper

@@ -234,10 +234,8 @@ fi
 
 # suppress some warnings in recent ld versions
 nowarn="-z noexecstack"
-if ! ld_is_lld; then
-	if [ "$LD_VERSION" -ge "$(echo 2.39 | ld_version)" ]; then
-		nowarn="$nowarn --no-warn-rwx-segments"
-	fi
+if "${CROSS}ld" -v --no-warn-rwx-segments >/dev/null 2>&1; then
+	nowarn="$nowarn --no-warn-rwx-segments"
 fi
 
 platformo=$object/"$platform".o

arch/powerpc/kernel/module_64.c

@@ -258,10 +258,6 @@ static unsigned long get_stubs_size(const Elf64_Ehdr *hdr,
 			break;
 		}
 	}
-	if (i == hdr->e_shnum) {
-		pr_err("%s: doesn't contain __patchable_function_entries.\n", me->name);
-		return -ENOEXEC;
-	}
 #endif
 
 	pr_debug("Looks like a total of %lu stubs, max\n", relocs);

arch/powerpc/mm/book3s64/radix_pgtable.c

@@ -976,14 +976,15 @@ int __meminit radix__vmemmap_create_mapping(unsigned long start,
 	return 0;
 }
 
-
+#ifdef CONFIG_ARCH_WANT_OPTIMIZE_DAX_VMEMMAP
 bool vmemmap_can_optimize(struct vmem_altmap *altmap, struct dev_pagemap *pgmap)
 {
 	if (radix_enabled())
 		return __vmemmap_can_optimize(altmap, pgmap);
 
 	return false;
 }
+#endif
 
 int __meminit vmemmap_check_pmd(pmd_t *pmdp, int node,
 				unsigned long addr, unsigned long next)
@@ -1120,6 +1121,19 @@ int __meminit radix__vmemmap_populate(unsigned long start, unsigned long end, in
 	pmd_t *pmd;
 	pte_t *pte;
 
+	/*
+	 * Make sure we align the start vmemmap addr so that we calculate
+	 * the correct start_pfn in altmap boundary check to decided whether
+	 * we should use altmap or RAM based backing memory allocation. Also
+	 * the address need to be aligned for set_pte operation.
+
+	 * If the start addr is already PMD_SIZE aligned we will try to use
+	 * a pmd mapping. We don't want to be too aggressive here beacause
+	 * that will cause more allocations in RAM. So only if the namespace
+	 * vmemmap start addr is PMD_SIZE aligned we will use PMD mapping.
+	 */
+
+	start = ALIGN_DOWN(start, PAGE_SIZE);
 	for (addr = start; addr < end; addr = next) {
 		next = pmd_addr_end(addr, end);
 
@@ -1145,8 +1159,8 @@ int __meminit radix__vmemmap_populate(unsigned long start, unsigned long end, in
 			 * in altmap block allocation failures, in which case
 			 * we fallback to RAM for vmemmap allocation.
 			 */
-			if (altmap && (!IS_ALIGNED(addr, PMD_SIZE) ||
-				       altmap_cross_boundary(altmap, addr, PMD_SIZE))) {
+			if (!IS_ALIGNED(addr, PMD_SIZE) || (altmap &&
+			    altmap_cross_boundary(altmap, addr, PMD_SIZE))) {
 				/*
 				 * make sure we don't create altmap mappings
 				 * covering things outside the device.

arch/powerpc/platforms/powernv/Kconfig

@@ -17,7 +17,7 @@ config PPC_POWERNV
 	select MMU_NOTIFIER
 	select FORCE_SMP
 	select ARCH_SUPPORTS_PER_VMA_LOCK
-	select PPC_RADIX_BROADCAST_TLBIE
+	select PPC_RADIX_BROADCAST_TLBIE if PPC_RADIX_MMU
 	default y
 
 config OPAL_PRD

arch/powerpc/platforms/pseries/Kconfig

@@ -23,7 +23,7 @@ config PPC_PSERIES
 	select FORCE_SMP
 	select SWIOTLB
 	select ARCH_SUPPORTS_PER_VMA_LOCK
-	select PPC_RADIX_BROADCAST_TLBIE
+	select PPC_RADIX_BROADCAST_TLBIE if PPC_RADIX_MMU
 	default y
 
 config PARAVIRT