Merge tag 'parisc-for-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture fixes from Helge Deller:
 "This patchset fixes and enforces correct section alignments for the
  ex_table, altinstructions, parisc_unwind, jump_table and bug_table
  which are created by inline assembly.

  Due to not being correctly aligned at link & load time they can
  trigger unnecessarily the kernel unaligned exception handler at
  runtime. While at it, I switched the bug table to use relative
  addresses which reduces the size of the table by half on 64-bit.

  We still had the ENOSYM and EREMOTERELEASE errno symbols as left-overs
  from HP-UX, which now trigger build-issues with glibc. We can simply
  remove them.

  Most of the patches are tagged for stable kernel series.

  Summary:

   - Drop HP-UX ENOSYM and EREMOTERELEASE return codes to avoid glibc
     build issues

   - Fix section alignments for ex_table, altinstructions, parisc unwind
     table, jump_table and bug_table

   - Reduce size of bug_table on 64-bit kernel by using relative
     pointers"

* tag 'parisc-for-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Reduce size of the bug_table on 64-bit kernel by half
  parisc: Drop the HP-UX ENOSYM and EREMOTERELEASE error codes
  parisc: Use natural CPU alignment for bug_table
  parisc: Ensure 32-bit alignment on parisc unwind section
  parisc: Mark lock_aligned variables 16-byte aligned on SMP
  parisc: Mark jump_table naturally aligned
  parisc: Mark altinstructions read-only and 32-bit aligned
  parisc: Mark ex_table entries 32-bit aligned in uaccess.h
  parisc: Mark ex_table entries 32-bit aligned in assembly.h

9 files changed, 43 insertions, 26 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index a7c9c0e69e5a..d14ccc948a29 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -115,9 +115,12 @@ config ARCH_HAS_ILOG2_U64
 	default n
 
 config GENERIC_BUG
-	bool
-	default y
+	def_bool y
 	depends on BUG
+	select GENERIC_BUG_RELATIVE_POINTERS if 64BIT
+
+config GENERIC_BUG_RELATIVE_POINTERS
+	bool
 
 config GENERIC_HWEIGHT
 	bool
diff --git a/arch/parisc/include/asm/alternative.h b/arch/parisc/include/asm/alternative.h
index 1ed45fd085d3..1eb488f25b83 100644
--- a/arch/parisc/include/asm/alternative.h
+++ b/arch/parisc/include/asm/alternative.h
@@ -34,7 +34,8 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end,
 
 /* Alternative SMP implementation. */
 #define ALTERNATIVE(cond, replacement)		"!0:"	\
-	".section .altinstructions, \"aw\"	!"	\
+	".section .altinstructions, \"a\"	!"	\
+	".align 4				!"	\
 	".word (0b-4-.)				!"	\
 	".hword 1, " __stringify(cond) "	!"	\
 	".word " __stringify(replacement) "	!"	\
@@ -44,7 +45,8 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end,
 
 /* to replace one single instructions by a new instruction */
 #define ALTERNATIVE(from, to, cond, replacement)\
-	.section .altinstructions, "aw"	!	\
+	.section .altinstructions, "a"	!	\
+	.align 4			!	\
 	.word (from - .)		!	\
 	.hword (to - from)/4, cond	!	\
 	.word replacement		!	\
@@ -52,7 +54,8 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end,
 
 /* to replace multiple instructions by new code */
 #define ALTERNATIVE_CODE(from, num_instructions, cond, new_instr_ptr)\
-	.section .altinstructions, "aw"	!	\
+	.section .altinstructions, "a"	!	\
+	.align 4			!	\
 	.word (from - .)		!	\
 	.hword -num_instructions, cond	!	\
 	.word (new_instr_ptr - .)	!	\
diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h
index 75677b526b2b..74d17d7e759d 100644
--- a/arch/parisc/include/asm/assembly.h
+++ b/arch/parisc/include/asm/assembly.h
@@ -574,6 +574,7 @@
 	 */
 #define ASM_EXCEPTIONTABLE_ENTRY(fault_addr, except_addr)	\
 	.section __ex_table,"aw"			!	\
+	.align 4					!	\
 	.word (fault_addr - .), (except_addr - .)	!	\
 	.previous
 
diff --git a/arch/parisc/include/asm/bug.h b/arch/parisc/include/asm/bug.h
index 4b6d60b94124..1641ff9a8b83 100644
--- a/arch/parisc/include/asm/bug.h
+++ b/arch/parisc/include/asm/bug.h
@@ -17,24 +17,27 @@
 #define	PARISC_BUG_BREAK_ASM	"break 0x1f, 0x1fff"
 #define	PARISC_BUG_BREAK_INSN	0x03ffe01f  /* PARISC_BUG_BREAK_ASM */
 
-#if defined(CONFIG_64BIT)
-#define ASM_WORD_INSN		".dword\t"
+#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
+# define __BUG_REL(val) ".word " __stringify(val) " - ."
 #else
-#define ASM_WORD_INSN		".word\t"
+# define __BUG_REL(val) ".word " __stringify(val)
 #endif
 
+
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 #define BUG()								\
 	do {								\
 		asm volatile("\n"					\
 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
-			     "\t.pushsection __bug_table,\"aw\"\n"	\
-			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
-			     "\t.short %c1, %c2\n"			\
-			     "\t.org 2b+%c3\n"				\
+			     "\t.pushsection __bug_table,\"a\"\n"	\
+			     "\t.align 4\n"				\
+			     "2:\t" __BUG_REL(1b) "\n"			\
+			     "\t" __BUG_REL(%c0)  "\n"			\
+			     "\t.short %1, %2\n"			\
+			     "\t.blockz %3-2*4-2*2\n"			\
 			     "\t.popsection"				\
 			     : : "i" (__FILE__), "i" (__LINE__),	\
-			     "i" (0), "i" (sizeof(struct bug_entry)) ); \
+			     "i" (0), "i" (sizeof(struct bug_entry)) );	\
 		unreachable();						\
 	} while(0)
 
@@ -51,10 +54,12 @@
 	do {								\
 		asm volatile("\n"					\
 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
-			     "\t.pushsection __bug_table,\"aw\"\n"	\
-			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
-			     "\t.short %c1, %c2\n"			\
-			     "\t.org 2b+%c3\n"				\
+			     "\t.pushsection __bug_table,\"a\"\n"	\
+			     "\t.align 4\n"				\
+			     "2:\t" __BUG_REL(1b) "\n"			\
+			     "\t" __BUG_REL(%c0)  "\n"			\
+			     "\t.short %1, %2\n"			\
+			     "\t.blockz %3-2*4-2*2\n"			\
 			     "\t.popsection"				\
 			     : : "i" (__FILE__), "i" (__LINE__),	\
 			     "i" (BUGFLAG_WARNING|(flags)),		\
@@ -65,10 +70,11 @@
 	do {								\
 		asm volatile("\n"					\
 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
-			     "\t.pushsection __bug_table,\"aw\"\n"	\
-			     "2:\t" ASM_WORD_INSN "1b\n"		\
-			     "\t.short %c0\n"				\
-			     "\t.org 2b+%c1\n"				\
+			     "\t.pushsection __bug_table,\"a\"\n"	\
+			     "\t.align %2\n"				\
+			     "2:\t" __BUG_REL(1b) "\n"			\
+			     "\t.short %0\n"				\
+			     "\t.blockz %1-4-2\n"			\
 			     "\t.popsection"				\
 			     : : "i" (BUGFLAG_WARNING|(flags)),		\
 			     "i" (sizeof(struct bug_entry)) );		\
diff --git a/arch/parisc/include/asm/jump_label.h b/arch/parisc/include/asm/jump_label.h
index af2a598bc0f8..94428798b6aa 100644
--- a/arch/parisc/include/asm/jump_label.h
+++ b/arch/parisc/include/asm/jump_label.h
@@ -15,10 +15,12 @@ static __always_inline bool arch_static_branch(struct static_key *key, bool bran
 	asm_volatile_goto("1:\n\t"
 		 "nop\n\t"
 		 ".pushsection __jump_table,  \"aw\"\n\t"
+		 ".align %1\n\t"
 		 ".word 1b - ., %l[l_yes] - .\n\t"
 		 __stringify(ASM_ULONG_INSN) " %c0 - .\n\t"
 		 ".popsection\n\t"
-		 : :  "i" (&((char *)key)[branch]) :  : l_yes);
+		 : : "i" (&((char *)key)[branch]), "i" (sizeof(long))
+		 : : l_yes);
 
 	return false;
 l_yes:
@@ -30,10 +32,12 @@ static __always_inline bool arch_static_branch_jump(struct static_key *key, bool
 	asm_volatile_goto("1:\n\t"
 		 "b,n %l[l_yes]\n\t"
 		 ".pushsection __jump_table,  \"aw\"\n\t"
+		 ".align %1\n\t"
 		 ".word 1b - ., %l[l_yes] - .\n\t"
 		 __stringify(ASM_ULONG_INSN) " %c0 - .\n\t"
 		 ".popsection\n\t"
-		 : :  "i" (&((char *)key)[branch]) :  : l_yes);
+		 : : "i" (&((char *)key)[branch]), "i" (sizeof(long))
+		 : : l_yes);
 
 	return false;
 l_yes:
diff --git a/arch/parisc/include/asm/ldcw.h b/arch/parisc/include/asm/ldcw.h
index ee9e071859b2..47ebc4c91eaf 100644
--- a/arch/parisc/include/asm/ldcw.h
+++ b/arch/parisc/include/asm/ldcw.h
@@ -55,7 +55,7 @@
 })
 
 #ifdef CONFIG_SMP
-# define __lock_aligned __section(".data..lock_aligned")
+# define __lock_aligned __section(".data..lock_aligned") __aligned(16)
 #endif
 
 #endif /* __PARISC_LDCW_H */
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index 2bf660eabe42..4165079898d9 100644
--- a/arch/parisc/include/asm/uaccess.h
+++ b/arch/parisc/include/asm/uaccess.h
@@ -41,6 +41,7 @@ struct exception_table_entry {
 
 #define ASM_EXCEPTIONTABLE_ENTRY( fault_addr, except_addr )\
 	".section __ex_table,\"aw\"\n"			   \
+	".align 4\n"					   \
 	".word (" #fault_addr " - .), (" #except_addr " - .)\n\t" \
 	".previous\n"
 
diff --git a/arch/parisc/include/uapi/asm/errno.h b/arch/parisc/include/uapi/asm/errno.h
index 87245c584784..8d94739d75c6 100644
--- a/arch/parisc/include/uapi/asm/errno.h
+++ b/arch/parisc/include/uapi/asm/errno.h
@@ -75,7 +75,6 @@
 
 /* We now return you to your regularly scheduled HPUX. */
 
-#define ENOSYM		215	/* symbol does not exist in executable */
 #define	ENOTSOCK	216	/* Socket operation on non-socket */
 #define	EDESTADDRREQ	217	/* Destination address required */
 #define	EMSGSIZE	218	/* Message too long */
@@ -101,7 +100,6 @@
 #define	ETIMEDOUT	238	/* Connection timed out */
 #define	ECONNREFUSED	239	/* Connection refused */
 #define	EREFUSED	ECONNREFUSED	/* for HP's NFS apparently */
-#define	EREMOTERELEASE	240	/* Remote peer released connection */
 #define	EHOSTDOWN	241	/* Host is down */
 #define	EHOSTUNREACH	242	/* No route to host */
 
diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S
index 58694d1989c2..548051b0b4af 100644
--- a/arch/parisc/kernel/vmlinux.lds.S
+++ b/arch/parisc/kernel/vmlinux.lds.S
@@ -130,6 +130,7 @@ SECTIONS
 	RO_DATA(8)
 
 	/* unwind info */
+	. = ALIGN(4);
 	.PARISC.unwind : {
 		__start___unwind = .;
 		*(.PARISC.unwind)