15 files changed, 96 insertions, 140 deletions

diff --git a/include/asm-generic/Kbuild b/include/asm-generic/Kbuild
index d436bee4d129..b20fa25a7e8d 100644
--- a/include/asm-generic/Kbuild
+++ b/include/asm-generic/Kbuild
@@ -22,7 +22,6 @@ mandatory-y += dma-mapping.h
 mandatory-y += dma.h
 mandatory-y += emergency-restart.h
 mandatory-y += exec.h
-mandatory-y += fb.h
 mandatory-y += ftrace.h
 mandatory-y += futex.h
 mandatory-y += hardirq.h
@@ -62,5 +61,6 @@ mandatory-y += uaccess.h
 mandatory-y += unaligned.h
 mandatory-y += vermagic.h
 mandatory-y += vga.h
+mandatory-y += video.h
 mandatory-y += word-at-a-time.h
 mandatory-y += xor.h
diff --git a/include/asm-generic/barrier.h b/include/asm-generic/barrier.h
index 0c0695763bea..d4f581c1e21d 100644
--- a/include/asm-generic/barrier.h
+++ b/include/asm-generic/barrier.h
@@ -294,5 +294,13 @@ do {									\
 #define io_stop_wc() do { } while (0)
 #endif
 
+/*
+ * Architectures that guarantee an implicit smp_mb() in switch_mm()
+ * can override smp_mb__after_switch_mm.
+ */
+#ifndef smp_mb__after_switch_mm
+# define smp_mb__after_switch_mm()	smp_mb()
+#endif
+
 #endif /* !__ASSEMBLY__ */
 #endif /* __ASM_GENERIC_BARRIER_H */
diff --git a/include/asm-generic/bitops/__ffs.h b/include/asm-generic/bitops/__ffs.h
index 446fea6dda78..2d08c750c8a7 100644
--- a/include/asm-generic/bitops/__ffs.h
+++ b/include/asm-generic/bitops/__ffs.h
@@ -10,9 +10,9 @@
  *
  * Undefined if no bit exists, so code should check against 0 first.
  */
-static __always_inline unsigned long generic___ffs(unsigned long word)
+static __always_inline unsigned int generic___ffs(unsigned long word)
 {
-	int num = 0;
+	unsigned int num = 0;
 
 #if BITS_PER_LONG == 64
 	if ((word & 0xffffffff) == 0) {
diff --git a/include/asm-generic/bitops/__fls.h b/include/asm-generic/bitops/__fls.h
index 54ccccf96e21..e974ec932ec1 100644
--- a/include/asm-generic/bitops/__fls.h
+++ b/include/asm-generic/bitops/__fls.h
@@ -10,9 +10,9 @@
  *
  * Undefined if no set bit exists, so code should check against 0 first.
  */
-static __always_inline unsigned long generic___fls(unsigned long word)
+static __always_inline unsigned int generic___fls(unsigned long word)
 {
-	int num = BITS_PER_LONG - 1;
+	unsigned int num = BITS_PER_LONG - 1;
 
 #if BITS_PER_LONG == 64
 	if (!(word & (~0ul << 32))) {
diff --git a/include/asm-generic/bitops/builtin-__ffs.h b/include/asm-generic/bitops/builtin-__ffs.h
index 87024da44d10..cf4b3d33bf96 100644
--- a/include/asm-generic/bitops/builtin-__ffs.h
+++ b/include/asm-generic/bitops/builtin-__ffs.h
@@ -8,7 +8,7 @@
  *
  * Undefined if no bit exists, so code should check against 0 first.
  */
-static __always_inline unsigned long __ffs(unsigned long word)
+static __always_inline unsigned int __ffs(unsigned long word)
 {
 	return __builtin_ctzl(word);
 }
diff --git a/include/asm-generic/bitops/builtin-__fls.h b/include/asm-generic/bitops/builtin-__fls.h
index 43a5aa9afbdb..6d72fc8a5259 100644
--- a/include/asm-generic/bitops/builtin-__fls.h
+++ b/include/asm-generic/bitops/builtin-__fls.h
@@ -8,7 +8,7 @@
  *
  * Undefined if no set bit exists, so code should check against 0 first.
  */
-static __always_inline unsigned long __fls(unsigned long word)
+static __always_inline unsigned int __fls(unsigned long word)
 {
 	return (sizeof(word) * 8) - 1 - __builtin_clzl(word);
 }
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 6e794420bd39..387720933973 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -72,7 +72,7 @@ struct bug_entry {
 #endif
 
 /*
- * WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
+ * WARN(), WARN_ON(), WARN_ON_ONCE(), and so on can be used to report
  * significant kernel issues that need prompt attention if they should ever
  * appear at runtime.
  *
@@ -156,7 +156,10 @@ extern __printf(1, 2) void __warn_printk(const char *fmt, ...);
 
 #else /* !CONFIG_BUG */
 #ifndef HAVE_ARCH_BUG
-#define BUG() do {} while (1)
+#define BUG() do {		\
+	do {} while (1);	\
+	unreachable();		\
+} while (0)
 #endif
 
 #ifndef HAVE_ARCH_BUG_ON
diff --git a/include/asm-generic/codetag.lds.h b/include/asm-generic/codetag.lds.h
new file mode 100644
index 000000000000..64f536b80380
--- /dev/null
+++ b/include/asm-generic/codetag.lds.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_GENERIC_CODETAG_LDS_H
+#define __ASM_GENERIC_CODETAG_LDS_H
+
+#define SECTION_WITH_BOUNDARIES(_name)	\
+	. = ALIGN(8);			\
+	__start_##_name = .;		\
+	KEEP(*(_name))			\
+	__stop_##_name = .;
+
+#define CODETAG_SECTIONS()		\
+	SECTION_WITH_BOUNDARIES(alloc_tags)
+
+#endif /* __ASM_GENERIC_CODETAG_LDS_H */
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index bac63e874c7b..80de699bf6af 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -9,6 +9,7 @@
 
 #include <asm/page.h> /* I/O is all done through memory accesses */
 #include <linux/string.h> /* for memset() and memcpy() */
+#include <linux/sizes.h>
 #include <linux/types.h>
 #include <linux/instruction_pointer.h>
 
@@ -991,7 +992,6 @@ static inline void iowrite64_rep(volatile void __iomem *addr,
 
 #ifdef __KERNEL__
 
-#include <linux/vmalloc.h>
 #define __io_virt(x) ((void __force *)(x))
 
 /*
diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h
deleted file mode 100644
index 9773582fd96e..000000000000
--- a/include/asm-generic/page.h
+++ /dev/null
@@ -1,103 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __ASM_GENERIC_PAGE_H
-#define __ASM_GENERIC_PAGE_H
-/*
- * Generic page.h implementation, for NOMMU architectures.
- * This provides the dummy definitions for the memory management.
- */
-
-#ifdef CONFIG_MMU
-#error need to provide a real asm/page.h
-#endif
-
-
-/* PAGE_SHIFT determines the page size */
-
-#define PAGE_SHIFT	12
-#ifdef __ASSEMBLY__
-#define PAGE_SIZE	(1 << PAGE_SHIFT)
-#else
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#endif
-#define PAGE_MASK	(~(PAGE_SIZE-1))
-
-#include <asm/setup.h>
-
-#ifndef __ASSEMBLY__
-
-#define clear_page(page)	memset((page), 0, PAGE_SIZE)
-#define copy_page(to,from)	memcpy((to), (from), PAGE_SIZE)
-
-#define clear_user_page(page, vaddr, pg)	clear_page(page)
-#define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
-
-/*
- * These are used to make use of C type-checking..
- */
-typedef struct {
-	unsigned long pte;
-} pte_t;
-typedef struct {
-	unsigned long pmd[16];
-} pmd_t;
-typedef struct {
-	unsigned long pgd;
-} pgd_t;
-typedef struct {
-	unsigned long pgprot;
-} pgprot_t;
-typedef struct page *pgtable_t;
-
-#define pte_val(x)	((x).pte)
-#define pmd_val(x)	((&x)->pmd[0])
-#define pgd_val(x)	((x).pgd)
-#define pgprot_val(x)	((x).pgprot)
-
-#define __pte(x)	((pte_t) { (x) } )
-#define __pmd(x)	((pmd_t) { (x) } )
-#define __pgd(x)	((pgd_t) { (x) } )
-#define __pgprot(x)	((pgprot_t) { (x) } )
-
-extern unsigned long memory_start;
-extern unsigned long memory_end;
-
-#endif /* !__ASSEMBLY__ */
-
-#define PAGE_OFFSET		(0)
-
-#ifndef ARCH_PFN_OFFSET
-#define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
-#endif
-
-#ifndef __ASSEMBLY__
-
-#define __va(x) ((void *)((unsigned long) (x)))
-#define __pa(x) ((unsigned long) (x))
-
-static inline unsigned long virt_to_pfn(const void *kaddr)
-{
-	return __pa(kaddr) >> PAGE_SHIFT;
-}
-#define virt_to_pfn virt_to_pfn
-static inline void *pfn_to_virt(unsigned long pfn)
-{
-	return __va(pfn) << PAGE_SHIFT;
-}
-#define pfn_to_virt pfn_to_virt
-
-#define virt_to_page(addr)	pfn_to_page(virt_to_pfn(addr))
-#define page_to_virt(page)	pfn_to_virt(page_to_pfn(page))
-
-#ifndef page_to_phys
-#define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
-#endif
-
-#define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
-				((void *)(kaddr) < (void *)memory_end))
-
-#endif /* __ASSEMBLY__ */
-
-#include <asm-generic/memory_model.h>
-#include <asm-generic/getorder.h>
-
-#endif /* __ASM_GENERIC_PAGE_H */
diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h
index 879e5f8aa5e9..7c48f5fbf8aa 100644
--- a/include/asm-generic/pgalloc.h
+++ b/include/asm-generic/pgalloc.h
@@ -16,15 +16,16 @@
  *
  * Return: pointer to the allocated memory or %NULL on error
  */
-static inline pte_t *__pte_alloc_one_kernel(struct mm_struct *mm)
+static inline pte_t *__pte_alloc_one_kernel_noprof(struct mm_struct *mm)
 {
-	struct ptdesc *ptdesc = pagetable_alloc(GFP_PGTABLE_KERNEL &
+	struct ptdesc *ptdesc = pagetable_alloc_noprof(GFP_PGTABLE_KERNEL &
 			~__GFP_HIGHMEM, 0);
 
 	if (!ptdesc)
 		return NULL;
 	return ptdesc_address(ptdesc);
 }
+#define __pte_alloc_one_kernel(...)	alloc_hooks(__pte_alloc_one_kernel_noprof(__VA_ARGS__))
 
 #ifndef __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
 /**
@@ -33,10 +34,11 @@ static inline pte_t *__pte_alloc_one_kernel(struct mm_struct *mm)
  *
  * Return: pointer to the allocated memory or %NULL on error
  */
-static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
+static inline pte_t *pte_alloc_one_kernel_noprof(struct mm_struct *mm)
 {
-	return __pte_alloc_one_kernel(mm);
+	return __pte_alloc_one_kernel_noprof(mm);
 }
+#define pte_alloc_one_kernel(...)	alloc_hooks(pte_alloc_one_kernel_noprof(__VA_ARGS__))
 #endif
 
 /**
@@ -61,11 +63,11 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
  *
  * Return: `struct page` referencing the ptdesc or %NULL on error
  */
-static inline pgtable_t __pte_alloc_one(struct mm_struct *mm, gfp_t gfp)
+static inline pgtable_t __pte_alloc_one_noprof(struct mm_struct *mm, gfp_t gfp)
 {
 	struct ptdesc *ptdesc;
 
-	ptdesc = pagetable_alloc(gfp, 0);
+	ptdesc = pagetable_alloc_noprof(gfp, 0);
 	if (!ptdesc)
 		return NULL;
 	if (!pagetable_pte_ctor(ptdesc)) {
@@ -75,6 +77,7 @@ static inline pgtable_t __pte_alloc_one(struct mm_struct *mm, gfp_t gfp)
 
 	return ptdesc_page(ptdesc);
 }
+#define __pte_alloc_one(...)	alloc_hooks(__pte_alloc_one_noprof(__VA_ARGS__))
 
 #ifndef __HAVE_ARCH_PTE_ALLOC_ONE
 /**
@@ -85,10 +88,11 @@ static inline pgtable_t __pte_alloc_one(struct mm_struct *mm, gfp_t gfp)
  *
  * Return: `struct page` referencing the ptdesc or %NULL on error
  */
-static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
+static inline pgtable_t pte_alloc_one_noprof(struct mm_struct *mm)
 {
-	return __pte_alloc_one(mm, GFP_PGTABLE_USER);
+	return __pte_alloc_one_noprof(mm, GFP_PGTABLE_USER);
 }
+#define pte_alloc_one(...)	alloc_hooks(pte_alloc_one_noprof(__VA_ARGS__))
 #endif
 
 /*
@@ -124,14 +128,14 @@ static inline void pte_free(struct mm_struct *mm, struct page *pte_page)
  *
  * Return: pointer to the allocated memory or %NULL on error
  */
-static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
+static inline pmd_t *pmd_alloc_one_noprof(struct mm_struct *mm, unsigned long addr)
 {
 	struct ptdesc *ptdesc;
 	gfp_t gfp = GFP_PGTABLE_USER;
 
 	if (mm == &init_mm)
 		gfp = GFP_PGTABLE_KERNEL;
-	ptdesc = pagetable_alloc(gfp, 0);
+	ptdesc = pagetable_alloc_noprof(gfp, 0);
 	if (!ptdesc)
 		return NULL;
 	if (!pagetable_pmd_ctor(ptdesc)) {
@@ -140,6 +144,7 @@ static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
 	}
 	return ptdesc_address(ptdesc);
 }
+#define pmd_alloc_one(...)	alloc_hooks(pmd_alloc_one_noprof(__VA_ARGS__))
 #endif
 
 #ifndef __HAVE_ARCH_PMD_FREE
@@ -157,7 +162,7 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
 
 #if CONFIG_PGTABLE_LEVELS > 3
 
-static inline pud_t *__pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+static inline pud_t *__pud_alloc_one_noprof(struct mm_struct *mm, unsigned long addr)
 {
 	gfp_t gfp = GFP_PGTABLE_USER;
 	struct ptdesc *ptdesc;
@@ -166,13 +171,14 @@ static inline pud_t *__pud_alloc_one(struct mm_struct *mm, unsigned long addr)
 		gfp = GFP_PGTABLE_KERNEL;
 	gfp &= ~__GFP_HIGHMEM;
 
-	ptdesc = pagetable_alloc(gfp, 0);
+	ptdesc = pagetable_alloc_noprof(gfp, 0);
 	if (!ptdesc)
 		return NULL;
 
 	pagetable_pud_ctor(ptdesc);
 	return ptdesc_address(ptdesc);
 }
+#define __pud_alloc_one(...)	alloc_hooks(__pud_alloc_one_noprof(__VA_ARGS__))
 
 #ifndef __HAVE_ARCH_PUD_ALLOC_ONE
 /**
@@ -184,10 +190,11 @@ static inline pud_t *__pud_alloc_one(struct mm_struct *mm, unsigned long addr)
  *
  * Return: pointer to the allocated memory or %NULL on error
  */
-static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
+static inline pud_t *pud_alloc_one_noprof(struct mm_struct *mm, unsigned long addr)
 {
-	return __pud_alloc_one(mm, addr);
+	return __pud_alloc_one_noprof(mm, addr);
 }
+#define pud_alloc_one(...)	alloc_hooks(pud_alloc_one_noprof(__VA_ARGS__))
 #endif
 
 static inline void __pud_free(struct mm_struct *mm, pud_t *pud)
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index db13bb620f52..c768de6f19a9 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -180,6 +180,11 @@ static inline bool is_kernel_rodata(unsigned long addr)
 	       addr < (unsigned long)__end_rodata;
 }
 
+static inline bool is_kernel_ro_after_init(unsigned long addr)
+{
+	return addr >= (unsigned long)__start_ro_after_init &&
+	       addr < (unsigned long)__end_ro_after_init;
+}
 /**
  * is_kernel_inittext - checks if the pointer address is located in the
  *                      .init.text section
diff --git a/include/asm-generic/fb.h b/include/asm-generic/video.h
index 6ccabb400aa6..b1da2309d943 100644
--- a/include/asm-generic/fb.h
+++ b/include/asm-generic/video.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
-#ifndef __ASM_GENERIC_FB_H_
-#define __ASM_GENERIC_FB_H_
+#ifndef __ASM_GENERIC_VIDEO_H_
+#define __ASM_GENERIC_VIDEO_H_
 
 /*
  * Only include this header file from your architecture's <asm/fb.h>.
@@ -10,8 +10,9 @@
 #include <linux/io.h>
 #include <linux/mm_types.h>
 #include <linux/pgtable.h>
+#include <linux/types.h>
 
-struct fb_info;
+struct device;
 
 #ifndef pgprot_framebuffer
 #define pgprot_framebuffer pgprot_framebuffer
@@ -23,11 +24,11 @@ static inline pgprot_t pgprot_framebuffer(pgprot_t prot,
 }
 #endif
 
-#ifndef fb_is_primary_device
-#define fb_is_primary_device fb_is_primary_device
-static inline int fb_is_primary_device(struct fb_info *info)
+#ifndef video_is_primary_device
+#define video_is_primary_device video_is_primary_device
+static inline bool video_is_primary_device(struct device *dev)
 {
-	return 0;
+	return false;
 }
 #endif
 
@@ -132,4 +133,4 @@ static inline void fb_memset_io(volatile void __iomem *addr, int c, size_t n)
 #define fb_memset fb_memset_io
 #endif
 
-#endif /* __ASM_GENERIC_FB_H_ */
+#endif /* __ASM_GENERIC_VIDEO_H_ */
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index f7749d0f2562..5703526d6ebf 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -3,7 +3,7 @@
  * linker scripts.
  *
  * A minimal linker scripts has following content:
- * [This is a sample, architectures may have special requiriements]
+ * [This is a sample, architectures may have special requirements]
  *
  * OUTPUT_FORMAT(...)
  * OUTPUT_ARCH(...)
@@ -50,6 +50,8 @@
  *               [__nosave_begin, __nosave_end] for the nosave data
  */
 
+#include <asm-generic/codetag.lds.h>
+
 #ifndef LOAD_OFFSET
 #define LOAD_OFFSET 0
 #endif
@@ -366,6 +368,7 @@
 	. = ALIGN(8);							\
 	BOUNDED_SECTION_BY(__dyndbg_classes, ___dyndbg_classes)		\
 	BOUNDED_SECTION_BY(__dyndbg, ___dyndbg)				\
+	CODETAG_SECTIONS()						\
 	LIKELY_PROFILE()		       				\
 	BRANCH_PROFILE()						\
 	TRACE_PRINTKS()							\
@@ -399,13 +402,13 @@
 
 #define INIT_TASK_DATA(align)						\
 	. = ALIGN(align);						\
-	__start_init_task = .;						\
+	__start_init_stack = .;						\
 	init_thread_union = .;						\
 	init_stack = .;							\
 	KEEP(*(.data..init_task))					\
 	KEEP(*(.data..init_thread_info))				\
-	. = __start_init_task + THREAD_SIZE;				\
-	__end_init_task = .;
+	. = __start_init_stack + THREAD_SIZE;				\
+	__end_init_stack = .;
 
 #define JUMP_TABLE_DATA							\
 	. = ALIGN(8);							\
@@ -449,10 +452,29 @@
 #endif
 
 /*
+ * Some symbol definitions will not exist yet during the first pass of the
+ * link, but are guaranteed to exist in the final link. Provide preliminary
+ * definitions that will be superseded in the final link to avoid having to
+ * rely on weak external linkage, which requires a GOT when used in position
+ * independent code.
+ */
+#define PRELIMINARY_SYMBOL_DEFINITIONS					\
+	PROVIDE(kallsyms_addresses = .);				\
+	PROVIDE(kallsyms_offsets = .);					\
+	PROVIDE(kallsyms_names = .);					\
+	PROVIDE(kallsyms_num_syms = .);					\
+	PROVIDE(kallsyms_relative_base = .);				\
+	PROVIDE(kallsyms_token_table = .);				\
+	PROVIDE(kallsyms_token_index = .);				\
+	PROVIDE(kallsyms_markers = .);					\
+	PROVIDE(kallsyms_seqs_of_names = .);
+
+/*
  * Read only Data
  */
 #define RO_DATA(align)							\
 	. = ALIGN((align));						\
+	PRELIMINARY_SYMBOL_DEFINITIONS					\
 	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\
 		__start_rodata = .;					\
 		*(.rodata) *(.rodata.*)					\
diff --git a/include/asm-generic/vtime.h b/include/asm-generic/vtime.h
deleted file mode 100644
index b1a49677fe25..000000000000
--- a/include/asm-generic/vtime.h
+++ /dev/null
@@ -1 +0,0 @@
-/* no content, but patch(1) dislikes empty files */