[RFC][PATCH 6/8] untangle asm/termios.h mess

From: Al Viro
Date: Mon Sep 10 2018 - 00:52:39 EST

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From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

Currently, asm/termios.h resolves either to uapi/asm/termios.h
(on architectures that don't have it) or to the same plus the
definitions that are only used by those who pull linux/termios_internal.h

That causes tons of inconveniences - e.g. we can't have generic
asm/termios.h with non-generic uapi/asm/termios.h.

Let's do the following:
* rename asm/termios.h to asm/termios_internal.h and make
linux/termios_internal.h pull that; that way all includes of
<asm/termios.h> will go directly to uapi/asm/termios.h
* all but 3 architectures actually have asm/termios.h completely
generic. Make those 3 select a new config symbol (HAVE_TERMIOS_INTERNAL)
and make the include of asm/termios_internal.h conditional upon that.
Remove all generic instances of asm/termios.h (including include/asm-generic
one).
* get rid of one pointless include of <asm/termios.h> in
drivers/tty.

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
arch/Kconfig | 3 +++
arch/alpha/Kconfig | 1 +
arch/alpha/include/asm/{termios.h => termios_internal.h} | 3 ---
arch/ia64/include/asm/termios.h | 13 -------------
arch/mips/include/asm/termios.h | 15 ---------------
arch/parisc/include/asm/termios.h | 7 -------
arch/powerpc/Kconfig | 1 +
.../powerpc/include/asm/{termios.h => termios_internal.h} | 2 --
arch/riscv/include/asm/Kbuild | 1 -
arch/s390/include/asm/termios.h | 12 ------------
arch/sparc/Kconfig | 1 +
arch/sparc/include/asm/{termios.h => termios_internal.h} | 4 ----
drivers/tty/n_hdlc.c | 1 -
include/asm-generic/termios.h | 9 ---------
include/linux/termios_internal.h | 3 +++
15 files changed, 9 insertions(+), 67 deletions(-)
rename arch/alpha/include/asm/{termios.h => termios_internal.h} (97%)
delete mode 100644 arch/ia64/include/asm/termios.h
delete mode 100644 arch/mips/include/asm/termios.h
delete mode 100644 arch/parisc/include/asm/termios.h
rename arch/powerpc/include/asm/{termios.h => termios_internal.h} (96%)
delete mode 100644 arch/s390/include/asm/termios.h
rename arch/sparc/include/asm/{termios.h => termios_internal.h} (98%)
delete mode 100644 include/asm-generic/termios.h

diff --git a/arch/Kconfig b/arch/Kconfig
index 6801123932a5..a36cce432768 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -727,6 +727,9 @@ config OLD_SIGACTION
config COMPAT_OLD_SIGACTION
bool

+config HAS_TERMIOS_INTERNAL
+ bool
+
config 64BIT_TIME
def_bool ARCH_HAS_64BIT_TIME
help
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 5b4f88363453..85120bbda191 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -30,6 +30,7 @@ config ALPHA
select MODULES_USE_ELF_RELA
select ODD_RT_SIGACTION
select OLD_SIGSUSPEND
+ select HAS_TERMIOS_INTERNAL
select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
help
The Alpha is a 64-bit general-purpose processor designed and
diff --git a/arch/alpha/include/asm/termios.h b/arch/alpha/include/asm/termios_internal.h
similarity index 97%
rename from arch/alpha/include/asm/termios.h
rename to arch/alpha/include/asm/termios_internal.h
index 63e1ffc8f719..6c2a67e65992 100644
--- a/arch/alpha/include/asm/termios.h
+++ b/arch/alpha/include/asm/termios_internal.h
@@ -2,9 +2,6 @@
#ifndef _ALPHA_TERMIOS_H
#define _ALPHA_TERMIOS_H

-#include <linux/uaccess.h>
-#include <uapi/asm/termios.h>
-
/* eof=^D eol=\0 eol2=\0 erase=del
werase=^W kill=^U reprint=^R sxtc=\0
intr=^C quit=^\ susp=^Z <OSF/1 VDSUSP>
diff --git a/arch/ia64/include/asm/termios.h b/arch/ia64/include/asm/termios.h
deleted file mode 100644
index 1cef02701401..000000000000
--- a/arch/ia64/include/asm/termios.h
+++ /dev/null
@@ -1,13 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Modified 1999
- * David Mosberger-Tang <davidm@xxxxxxxxxx>, Hewlett-Packard Co
- *
- * 99/01/28 Added N_IRDA and N_SMSBLOCK
- */
-#ifndef _ASM_IA64_TERMIOS_H
-#define _ASM_IA64_TERMIOS_H
-
-#include <uapi/asm/termios.h>
-
-#endif /* _ASM_IA64_TERMIOS_H */
diff --git a/arch/mips/include/asm/termios.h b/arch/mips/include/asm/termios.h
deleted file mode 100644
index 12bc56857bf1..000000000000
--- a/arch/mips/include/asm/termios.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995, 1996, 2000, 2001 by Ralf Baechle
- * Copyright (C) 2000, 2001 Silicon Graphics, Inc.
- */
-#ifndef _ASM_TERMIOS_H
-#define _ASM_TERMIOS_H
-
-#include <linux/uaccess.h>
-#include <uapi/asm/termios.h>
-
-#endif /* _ASM_TERMIOS_H */
diff --git a/arch/parisc/include/asm/termios.h b/arch/parisc/include/asm/termios.h
deleted file mode 100644
index 1850a90befb3..000000000000
--- a/arch/parisc/include/asm/termios.h
+++ /dev/null
@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _PARISC_TERMIOS_H
-#define _PARISC_TERMIOS_H
-
-#include <uapi/asm/termios.h>
-
-#endif /* _PARISC_TERMIOS_H */
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index db0b6eebbfa5..b1402b1f1685 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -223,6 +223,7 @@ config PPC
select HAVE_VIRT_CPU_ACCOUNTING
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_RSEQ
+ select HAS_TERMIOS_INTERNAL
select IOMMU_HELPER if PPC64
select IRQ_DOMAIN
select IRQ_FORCED_THREADING
diff --git a/arch/powerpc/include/asm/termios.h b/arch/powerpc/include/asm/termios_internal.h
similarity index 96%
rename from arch/powerpc/include/asm/termios.h
rename to arch/powerpc/include/asm/termios_internal.h
index cb1e593e95bf..b93e889342cf 100644
--- a/arch/powerpc/include/asm/termios.h
+++ b/arch/powerpc/include/asm/termios_internal.h
@@ -12,8 +12,6 @@
#ifndef _ASM_POWERPC_TERMIOS_H
#define _ASM_POWERPC_TERMIOS_H

-#include <uapi/asm/termios.h>
-
/* ^C ^\ del ^U ^D 1 0 0 0 0 ^W ^R ^Z ^Q ^S ^V ^U */
#define INIT_C_CC "\003\034\177\025\004\001\000\000\000\000\027\022\032\021\023\026\025"

diff --git a/arch/riscv/include/asm/Kbuild b/arch/riscv/include/asm/Kbuild
index efdbe311e936..f74ea476a932 100644
--- a/arch/riscv/include/asm/Kbuild
+++ b/arch/riscv/include/asm/Kbuild
@@ -52,7 +52,6 @@ generic-y += stat.h
generic-y += statfs.h
generic-y += swab.h
generic-y += termbits.h
-generic-y += termios.h
generic-y += topology.h
generic-y += trace_clock.h
generic-y += types.h
diff --git a/arch/s390/include/asm/termios.h b/arch/s390/include/asm/termios.h
deleted file mode 100644
index 0e26fe97b0d4..000000000000
--- a/arch/s390/include/asm/termios.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * S390 version
- *
- * Derived from "include/asm-i386/termios.h"
- */
-#ifndef _S390_TERMIOS_H
-#define _S390_TERMIOS_H
-
-#include <uapi/asm/termios.h>
-
-#endif /* _S390_TERMIOS_H */
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index e6f2a38d2e61..ef9fba4a2d0f 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -33,6 +33,7 @@ config SPARC
select HAVE_CBPF_JIT if SPARC32
select HAVE_EBPF_JIT if SPARC64
select HAVE_DEBUG_BUGVERBOSE
+ select HAS_TERMIOS_INTERNAL
select GENERIC_SMP_IDLE_THREAD
select GENERIC_CLOCKEVENTS
select GENERIC_STRNCPY_FROM_USER
diff --git a/arch/sparc/include/asm/termios.h b/arch/sparc/include/asm/termios_internal.h
similarity index 98%
rename from arch/sparc/include/asm/termios.h
rename to arch/sparc/include/asm/termios_internal.h
index 0652f870bb1a..028c6bd6e0a7 100644
--- a/arch/sparc/include/asm/termios.h
+++ b/arch/sparc/include/asm/termios_internal.h
@@ -2,10 +2,6 @@
#ifndef _SPARC_TERMIOS_H
#define _SPARC_TERMIOS_H

-#include <uapi/asm/termios.h>
-#include <linux/uaccess.h>
-
-
/*
* c_cc characters in the termio structure. Oh, how I love being
* backwardly compatible. Notice that character 4 and 5 are
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index dabb391909aa..ca3395994a43 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -101,7 +101,6 @@
#include <linux/if.h>
#include <linux/bitops.h>

-#include <asm/termios.h>
#include <linux/uaccess.h>

/*
diff --git a/include/asm-generic/termios.h b/include/asm-generic/termios.h
deleted file mode 100644
index da3b0fe25442..000000000000
--- a/include/asm-generic/termios.h
+++ /dev/null
@@ -1,9 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_GENERIC_TERMIOS_H
-#define _ASM_GENERIC_TERMIOS_H
-
-
-#include <linux/uaccess.h>
-#include <uapi/asm-generic/termios.h>
-
-#endif /* _ASM_GENERIC_TERMIOS_H */
diff --git a/include/linux/termios_internal.h b/include/linux/termios_internal.h
index d25b9a9c2faf..343f7868713d 100644
--- a/include/linux/termios_internal.h
+++ b/include/linux/termios_internal.h
@@ -4,6 +4,9 @@

#include <linux/uaccess.h>
#include <asm/termios.h>
+#ifdef CONFIG_HAS_TERMIOS_INTERNAL
+#include <asm/termios_internal.h>
+#endif

#ifndef INIT_C_CC
/* intr=^C quit=^\ erase=del kill=^U
--
2.11.0

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Previous message: Al Viro: "[RFC][PATCH 1/8] start unifying termios convertors"
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