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Subject[PATCH v2 02/16] powerpc: override __ALIGN() and __ALIGN_STR() macros
Date
Powerpc instructions must be word-aligned. Currently,
there is an alignment of 16 bytes (by default), and it is
much more than what is required for powerpc (4 bytes).

The default expansion of __ALIGN() macro is:
#define __ALIGN .align 4,0x90

Since Powerpc Linux does not require a 16 byte alignment,
override __ALIGN() and __ALIGN_STR() macros to use required
4 byte alignment.

Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
---
arch/powerpc/include/asm/linkage.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/include/asm/linkage.h b/arch/powerpc/include/asm/linkage.h
index b71b9582e754..8df88fe61438 100644
--- a/arch/powerpc/include/asm/linkage.h
+++ b/arch/powerpc/include/asm/linkage.h
@@ -2,8 +2,12 @@
#ifndef _ASM_POWERPC_LINKAGE_H
#define _ASM_POWERPC_LINKAGE_H

+#include <linux/stringify.h>
#include <asm/types.h>

+#define __ALIGN .align 2
+#define __ALIGN_STR __stringify(__ALIGN)
+
#ifdef CONFIG_PPC64_ELF_ABI_V1
#define cond_syscall(x) \
asm ("\t.weak " #x "\n\t.set " #x ", sys_ni_syscall\n" \
--
2.31.1
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