linux-kernel - [PATCH 14/24] ARM64:ILP32 use the standard start_thread for ILP32 so the processor state is not AARCH32

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Message-Id: <1409779158-30963-15-git-send-email-apinski@cavium.com>
Date:	Wed,  3 Sep 2014 14:19:08 -0700
From:	Andrew Pinski <apinski@...ium.com>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	pinskia@...il.com
Cc:	Andrew Pinski <apinski@...ium.com>
Subject: [PATCH 14/24] ARM64:ILP32 use the standard start_thread for ILP32 so the processor state is not AARCH32

If we have both ILP32 and AARCH32 compiled in, we need use the non compat start
thread for ILP32.

Signed-off-by: Andrew Pinski <apinski@...ium.com>
---
 arch/arm64/include/asm/processor.h |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 286b1be..7bd9f32 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -104,6 +104,17 @@ static inline void start_thread(struct pt_regs *regs, unsigned long pc,
 static inline void compat_start_thread(struct pt_regs *regs, unsigned long pc,
 				       unsigned long sp)
 {
+#ifdef CONFIG_ARM64_ILP32
+	/*
+	 * ILP32 thread are started the same way as LP64 threads.
+	 * Note we cannot use is_ilp32_compat_task here as that
+	 * would introduce a header depency issue.
+	 */
+	if (!test_thread_flag(TIF_AARCH32)) {
+		start_thread(regs, pc, sp);
+		return;
+	}
+#endif
 	start_thread_common(regs, pc);
 	regs->pstate = COMPAT_PSR_MODE_USR;
 	if (pc & 1)
-- 
1.7.2.5

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