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From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v8 1/9] book3s/64: avoid circular header inclusion in mmu-hash.h
Date: Tue, 16 Oct 2018 05:06:50 +0000 (UTC)	[thread overview]
Message-ID: <bf0bcc3e056036321cf1b1cd4191089a7d0ce76d.1539623258.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <cover.1539623258.git.christophe.leroy@c-s.fr>

When activating CONFIG_THREAD_INFO_IN_TASK, linux/sched.h
includes asm/current.h. This generates a circular dependency.
To avoid that, asm/processor.h shall not be included in mmu-hash.h

In order to do that, this patch moves into a new header called
asm/task_size_user64.h the information from asm/processor.h required
by mmu-hash.h

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/include/asm/book3s/64/mmu-hash.h |  2 +-
 arch/powerpc/include/asm/processor.h          | 34 +---------------------
 arch/powerpc/include/asm/task_size_user64.h   | 42 +++++++++++++++++++++++++++
 arch/powerpc/kvm/book3s_hv_hmi.c              |  1 +
 4 files changed, 45 insertions(+), 34 deletions(-)
 create mode 100644 arch/powerpc/include/asm/task_size_user64.h

diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index fc7f056e9d97..026450f8304e 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
@@ -23,7 +23,7 @@
  */
 #include <asm/book3s/64/pgtable.h>
 #include <asm/bug.h>
-#include <asm/processor.h>
+#include <asm/task_size_user64.h>
 #include <asm/cpu_has_feature.h>
 
 /*
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 7d04d60a39c9..2caa44db709a 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -101,40 +101,8 @@ void release_thread(struct task_struct *);
 #endif
 
 #ifdef CONFIG_PPC64
-/*
- * 64-bit user address space can have multiple limits
- * For now supported values are:
- */
-#define TASK_SIZE_64TB  (0x0000400000000000UL)
-#define TASK_SIZE_128TB (0x0000800000000000UL)
-#define TASK_SIZE_512TB (0x0002000000000000UL)
-#define TASK_SIZE_1PB   (0x0004000000000000UL)
-#define TASK_SIZE_2PB   (0x0008000000000000UL)
-/*
- * With 52 bits in the address we can support
- * upto 4PB of range.
- */
-#define TASK_SIZE_4PB   (0x0010000000000000UL)
 
-/*
- * For now 512TB is only supported with book3s and 64K linux page size.
- */
-#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
-/*
- * Max value currently used:
- */
-#define TASK_SIZE_USER64		TASK_SIZE_4PB
-#define DEFAULT_MAP_WINDOW_USER64	TASK_SIZE_128TB
-#define TASK_CONTEXT_SIZE		TASK_SIZE_512TB
-#else
-#define TASK_SIZE_USER64		TASK_SIZE_64TB
-#define DEFAULT_MAP_WINDOW_USER64	TASK_SIZE_64TB
-/*
- * We don't need to allocate extended context ids for 4K page size, because
- * we limit the max effective address on this config to 64TB.
- */
-#define TASK_CONTEXT_SIZE		TASK_SIZE_64TB
-#endif
+#include <asm/task_size_user64.h>
 
 /*
  * 32-bit user address space is 4GB - 1 page
diff --git a/arch/powerpc/include/asm/task_size_user64.h b/arch/powerpc/include/asm/task_size_user64.h
new file mode 100644
index 000000000000..a4043075864b
--- /dev/null
+++ b/arch/powerpc/include/asm/task_size_user64.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_TASK_SIZE_USER64_H
+#define _ASM_POWERPC_TASK_SIZE_USER64_H
+
+#ifdef CONFIG_PPC64
+/*
+ * 64-bit user address space can have multiple limits
+ * For now supported values are:
+ */
+#define TASK_SIZE_64TB  (0x0000400000000000UL)
+#define TASK_SIZE_128TB (0x0000800000000000UL)
+#define TASK_SIZE_512TB (0x0002000000000000UL)
+#define TASK_SIZE_1PB   (0x0004000000000000UL)
+#define TASK_SIZE_2PB   (0x0008000000000000UL)
+/*
+ * With 52 bits in the address we can support
+ * upto 4PB of range.
+ */
+#define TASK_SIZE_4PB   (0x0010000000000000UL)
+
+/*
+ * For now 512TB is only supported with book3s and 64K linux page size.
+ */
+#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
+/*
+ * Max value currently used:
+ */
+#define TASK_SIZE_USER64		TASK_SIZE_4PB
+#define DEFAULT_MAP_WINDOW_USER64	TASK_SIZE_128TB
+#define TASK_CONTEXT_SIZE		TASK_SIZE_512TB
+#else
+#define TASK_SIZE_USER64		TASK_SIZE_64TB
+#define DEFAULT_MAP_WINDOW_USER64	TASK_SIZE_64TB
+/*
+ * We don't need to allocate extended context ids for 4K page size, because
+ * we limit the max effective address on this config to 64TB.
+ */
+#define TASK_CONTEXT_SIZE		TASK_SIZE_64TB
+#endif
+
+#endif /* CONFIG_PPC64 */
+#endif /* _ASM_POWERPC_TASK_SIZE_USER64_H */
diff --git a/arch/powerpc/kvm/book3s_hv_hmi.c b/arch/powerpc/kvm/book3s_hv_hmi.c
index e3f738eb1cac..64b5011475c7 100644
--- a/arch/powerpc/kvm/book3s_hv_hmi.c
+++ b/arch/powerpc/kvm/book3s_hv_hmi.c
@@ -24,6 +24,7 @@
 #include <linux/compiler.h>
 #include <asm/paca.h>
 #include <asm/hmi.h>
+#include <asm/processor.h>
 
 void wait_for_subcore_guest_exit(void)
 {
-- 
2.13.3


  reply	other threads:[~2018-10-16  5:07 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-16  5:06 [PATCH v8 0/9] powerpc: Switch to CONFIG_THREAD_INFO_IN_TASK Christophe Leroy
2018-10-16  5:06 ` Christophe Leroy [this message]
2018-10-16  5:06 ` [PATCH v8 2/9] powerpc: Only use task_struct 'cpu' field on SMP Christophe Leroy
2018-10-16  5:06 ` [PATCH v8 3/9] powerpc: Prepare for moving thread_info into task_struct Christophe Leroy
2018-10-16  5:06 ` [PATCH v8 4/9] powerpc: Activate CONFIG_THREAD_INFO_IN_TASK Christophe Leroy
2018-10-16  5:06 ` [PATCH v8 5/9] powerpc: regain entire stack space Christophe Leroy
2018-10-16  5:07 ` [PATCH v8 6/9] powerpc: 'current_set' is now a table of task_struct pointers Christophe Leroy
2018-10-16  5:07 ` [PATCH v8 7/9] powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU Christophe Leroy
2018-10-16  5:07 ` [PATCH v8 8/9] powerpc/64: Remove CURRENT_THREAD_INFO Christophe Leroy
2018-10-16  5:07 ` [PATCH v8 9/9] powerpc: clean stack pointers naming Christophe Leroy

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