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Message-Id: <20210709115311.3424912-3-hch@lst.de>
Date: Fri, 9 Jul 2021 13:53:11 +0200
From: Christoph Hellwig <hch@....de>
To: Yoshinori Sato <ysato@...rs.sourceforge.jp>
Cc: uclinux-h8-devel@...ts.sourceforge.jp, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] h8300: don't implement set_fs
There is no need for set_fs on this nommu-only architecture, so just
remove all the boilerplate code.
Signed-off-by: Christoph Hellwig <hch@....de>
---
arch/h8300/Kconfig | 1 -
arch/h8300/include/asm/processor.h | 1 -
arch/h8300/include/asm/segment.h | 40 ----------------------------
arch/h8300/include/asm/thread_info.h | 3 ---
arch/h8300/kernel/entry.S | 1 -
arch/h8300/kernel/head_ram.S | 1 -
arch/h8300/mm/init.c | 6 -----
7 files changed, 53 deletions(-)
delete mode 100644 arch/h8300/include/asm/segment.h
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 3e3e0f16f7e0..fe48c4f26cc8 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -24,7 +24,6 @@ config H8300
select HAVE_ARCH_KGDB
select HAVE_ARCH_HASH
select CPU_NO_EFFICIENT_FFS
- select SET_FS
select UACCESS_MEMCPY
config CPU_BIG_ENDIAN
diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h
index a060b41b2d31..66d7d5271f10 100644
--- a/arch/h8300/include/asm/processor.h
+++ b/arch/h8300/include/asm/processor.h
@@ -13,7 +13,6 @@
#define __ASM_H8300_PROCESSOR_H
#include <linux/compiler.h>
-#include <asm/segment.h>
#include <asm/ptrace.h>
#include <asm/current.h>
diff --git a/arch/h8300/include/asm/segment.h b/arch/h8300/include/asm/segment.h
deleted file mode 100644
index 37950725d9b9..000000000000
--- a/arch/h8300/include/asm/segment.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _H8300_SEGMENT_H
-#define _H8300_SEGMENT_H
-
-/* define constants */
-#define USER_DATA (1)
-#ifndef __USER_DS
-#define __USER_DS (USER_DATA)
-#endif
-#define USER_PROGRAM (2)
-#define SUPER_DATA (3)
-#ifndef __KERNEL_DS
-#define __KERNEL_DS (SUPER_DATA)
-#endif
-#define SUPER_PROGRAM (4)
-
-#ifndef __ASSEMBLY__
-
-typedef struct {
- unsigned long seg;
-} mm_segment_t;
-
-#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-#define USER_DS MAKE_MM_SEG(__USER_DS)
-#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS)
-
-/*
- * Get/set the SFC/DFC registers for MOVES instructions
- */
-
-static inline mm_segment_t get_fs(void)
-{
- return USER_DS;
-}
-
-#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* _H8300_SEGMENT_H */
diff --git a/arch/h8300/include/asm/thread_info.h b/arch/h8300/include/asm/thread_info.h
index a518214d4ddd..ff2d873749a4 100644
--- a/arch/h8300/include/asm/thread_info.h
+++ b/arch/h8300/include/asm/thread_info.h
@@ -10,7 +10,6 @@
#define _ASM_THREAD_INFO_H
#include <asm/page.h>
-#include <asm/segment.h>
#ifdef __KERNEL__
@@ -31,7 +30,6 @@ struct thread_info {
unsigned long flags; /* low level flags */
int cpu; /* cpu we're on */
int preempt_count; /* 0 => preemptable, <0 => BUG */
- mm_segment_t addr_limit;
};
/*
@@ -43,7 +41,6 @@ struct thread_info {
.flags = 0, \
.cpu = 0, \
.preempt_count = INIT_PREEMPT_COUNT, \
- .addr_limit = KERNEL_DS, \
}
/* how to get the thread information struct from C */
diff --git a/arch/h8300/kernel/entry.S b/arch/h8300/kernel/entry.S
index c6e289b5f1f2..42db87c17917 100644
--- a/arch/h8300/kernel/entry.S
+++ b/arch/h8300/kernel/entry.S
@@ -17,7 +17,6 @@
#include <linux/sys.h>
#include <asm/unistd.h>
#include <asm/setup.h>
-#include <asm/segment.h>
#include <asm/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
diff --git a/arch/h8300/kernel/head_ram.S b/arch/h8300/kernel/head_ram.S
index dbf8429f5fab..489462f0ee57 100644
--- a/arch/h8300/kernel/head_ram.S
+++ b/arch/h8300/kernel/head_ram.S
@@ -4,7 +4,6 @@
#include <linux/init.h>
#include <asm/unistd.h>
#include <asm/setup.h>
-#include <asm/segment.h>
#include <asm/linkage.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
diff --git a/arch/h8300/mm/init.c b/arch/h8300/mm/init.c
index f7bf4693e3b2..9fa13312720a 100644
--- a/arch/h8300/mm/init.c
+++ b/arch/h8300/mm/init.c
@@ -34,7 +34,6 @@
#include <linux/gfp.h>
#include <asm/setup.h>
-#include <asm/segment.h>
#include <asm/page.h>
#include <asm/sections.h>
@@ -71,11 +70,6 @@ void __init paging_init(void)
panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
__func__, PAGE_SIZE, PAGE_SIZE);
- /*
- * Set up SFC/DFC registers (user data space).
- */
- set_fs(USER_DS);
-
pr_debug("before free_area_init\n");
pr_debug("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n",
--
2.30.2
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