From: Helge Deller <deller@gmx.de>
Date: Mon, 20 Nov 2023 22:30:49 +0000 (+0100)
Subject: parisc: Use natural CPU alignment for bug_table
X-Git-Tag: v6.6.17~2343
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d68cafc2357d8c229150246984b521b901e17384;p=platform%2Fkernel%2Flinux-rpi.git

parisc: Use natural CPU alignment for bug_table

commit fe76a1349f235969381832c83d703bc911021eb6 upstream.

Make sure that the __bug_table section gets 32- or 64-bit aligned,
depending if a 32- or 64-bit kernel is being built.
Mark it non-writeable and use .blockz instead of the .org assembler
directive to pad the struct.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org   # v6.0+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/parisc/include/asm/bug.h b/arch/parisc/include/asm/bug.h
index 4b6d60b9..b9cad0b 100644
--- a/arch/parisc/include/asm/bug.h
+++ b/arch/parisc/include/asm/bug.h
@@ -28,13 +28,15 @@
 	do {								\
 		asm volatile("\n"					\
 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
-			     "\t.pushsection __bug_table,\"aw\"\n"	\
+			     "\t.pushsection __bug_table,\"a\"\n"	\
+			     "\t.align %4\n"				\
 			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
-			     "\t.short %c1, %c2\n"			\
-			     "\t.org 2b+%c3\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)),	\
+			     "i" (sizeof(long)) );			\
 		unreachable();						\
 	} while(0)
 
@@ -51,27 +53,31 @@
 	do {								\
 		asm volatile("\n"					\
 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
-			     "\t.pushsection __bug_table,\"aw\"\n"	\
+			     "\t.pushsection __bug_table,\"a\"\n"	\
+			     "\t.align %4\n"				\
 			     "2:\t" ASM_WORD_INSN "1b, %c0\n"		\
-			     "\t.short %c1, %c2\n"			\
-			     "\t.org 2b+%c3\n"				\
+			     "\t.short %1, %2\n"			\
+			     "\t.blockz %3-2*%4-2*2\n"			\
 			     "\t.popsection"				\
 			     : : "i" (__FILE__), "i" (__LINE__),	\
 			     "i" (BUGFLAG_WARNING|(flags)),		\
-			     "i" (sizeof(struct bug_entry)) );		\
+			     "i" (sizeof(struct bug_entry)),		\
+			     "i" (sizeof(long)) );			\
 	} while(0)
 #else
 #define __WARN_FLAGS(flags)						\
 	do {								\
 		asm volatile("\n"					\
 			     "1:\t" PARISC_BUG_BREAK_ASM "\n"		\
-			     "\t.pushsection __bug_table,\"aw\"\n"	\
+			     "\t.pushsection __bug_table,\"a\"\n"	\
+			     "\t.align %2\n"				\
 			     "2:\t" ASM_WORD_INSN "1b\n"		\
-			     "\t.short %c0\n"				\
-			     "\t.org 2b+%c1\n"				\
+			     "\t.short %0\n"				\
+			     "\t.blockz %1-%2-2\n"			\
 			     "\t.popsection"				\
 			     : : "i" (BUGFLAG_WARNING|(flags)),		\
-			     "i" (sizeof(struct bug_entry)) );		\
+			     "i" (sizeof(struct bug_entry)),		\
+			     "i" (sizeof(long)) );			\
 	} while(0)
 #endif