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Message-ID: <Pine.LNX.4.64.0707190530040.19703@localhost.localdomain>
Date: Thu, 19 Jul 2007 05:37:58 -0400 (EDT)
From: "Robert P. J. Day" <rpjday@...dspring.com>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH][RFC] Remove R/W semaphore content from generic semaphore.h
headers.
apparently, for historical reasons, virtually every generic
semaphore.h header file includes the more specific rwsem.h header
file. this is probably a bad thing, since someone who wants only a
generic semaphore shouldn't be forced to include rwsem definitions as
well if they don't need them.
this patch removes all of those extraneous definitions, as well as
some other rwsem-related cruft. however, i wouldn't try to apply this
patch as is since it's almost guaranteed to introduce breakage.
chances are, there are some places in the code that use R/W semaphores
but are just *coincidentally* getting those definitions via
semaphore.h so everything works just fine. as soon as you remove that
include of <linux/rwsem.h> ... boom.
the better solution would be for each arch maintainer to do this
cleanup for their own code, if they think it's worth it. (note the
occasional definition of the macro RW_LOCK_BIAS, which also seems out
of place in a generic semaphore.h header file, and which clearly
belongs in rwsem.h.)
include/asm-alpha/semaphore.h | 1 -
include/asm-arm/semaphore.h | 1 -
include/asm-arm26/semaphore.h | 1 -
include/asm-avr32/semaphore.h | 1 -
include/asm-cris/semaphore.h | 3 ---
include/asm-frv/semaphore.h | 3 ---
include/asm-h8300/semaphore.h | 1 -
include/asm-i386/semaphore.h | 1 -
include/asm-ia64/semaphore.h | 1 -
include/asm-m32r/semaphore.h | 1 -
include/asm-m68k/semaphore.h | 1 -
include/asm-m68knommu/semaphore.h | 1 -
include/asm-mips/semaphore.h | 8 --------
include/asm-parisc/semaphore.h | 1 -
include/asm-powerpc/semaphore.h | 8 --------
include/asm-s390/semaphore.h | 1 -
include/asm-sh/semaphore.h | 1 -
include/asm-sh64/semaphore.h | 1 -
include/asm-sparc/semaphore.h | 1 -
include/asm-sparc64/semaphore.h | 1 -
include/asm-v850/semaphore.h | 1 -
include/asm-x86_64/semaphore.h | 2 --
include/asm-xtensa/semaphore.h | 1 -
23 files changed, 42 deletions(-)
diff --git a/include/asm-alpha/semaphore.h b/include/asm-alpha/semaphore.h
index 1a6295f..9f2db03 100644
--- a/include/asm-alpha/semaphore.h
+++ b/include/asm-alpha/semaphore.h
@@ -13,7 +13,6 @@
#include <asm/atomic.h>
#include <linux/compiler.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
atomic_t count;
diff --git a/include/asm-arm/semaphore.h b/include/asm-arm/semaphore.h
index d5dc624..619dd52 100644
--- a/include/asm-arm/semaphore.h
+++ b/include/asm-arm/semaphore.h
@@ -7,7 +7,6 @@
#include <linux/linkage.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <asm/atomic.h>
#include <asm/locks.h>
diff --git a/include/asm-arm26/semaphore.h b/include/asm-arm26/semaphore.h
index 1fda543..cdd878b 100644
--- a/include/asm-arm26/semaphore.h
+++ b/include/asm-arm26/semaphore.h
@@ -7,7 +7,6 @@
#include <linux/linkage.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <asm/atomic.h>
#include <asm/locks.h>
diff --git a/include/asm-avr32/semaphore.h b/include/asm-avr32/semaphore.h
index ef99ddc..9320a12 100644
--- a/include/asm-avr32/semaphore.h
+++ b/include/asm-avr32/semaphore.h
@@ -18,7 +18,6 @@
#include <asm/system.h>
#include <asm/atomic.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
atomic_t count;
diff --git a/include/asm-cris/semaphore.h b/include/asm-cris/semaphore.h
index 53f548b..0555595 100644
--- a/include/asm-cris/semaphore.h
+++ b/include/asm-cris/semaphore.h
@@ -5,11 +5,8 @@
#ifndef _CRIS_SEMAPHORE_H
#define _CRIS_SEMAPHORE_H
-#define RW_LOCK_BIAS 0x01000000
-
#include <linux/wait.h>
#include <linux/spinlock.h>
-#include <linux/rwsem.h>
#include <asm/system.h>
#include <asm/atomic.h>
diff --git a/include/asm-frv/semaphore.h b/include/asm-frv/semaphore.h
index 0958652..4a76215 100644
--- a/include/asm-frv/semaphore.h
+++ b/include/asm-frv/semaphore.h
@@ -11,14 +11,11 @@
#ifndef _ASM_SEMAPHORE_H
#define _ASM_SEMAPHORE_H
-#define RW_LOCK_BIAS 0x01000000
-
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
#include <linux/wait.h>
#include <linux/spinlock.h>
-#include <linux/rwsem.h>
/*
* the semaphore definition
diff --git a/include/asm-h8300/semaphore.h b/include/asm-h8300/semaphore.h
index 81bae2a..15021cc 100644
--- a/include/asm-h8300/semaphore.h
+++ b/include/asm-h8300/semaphore.h
@@ -8,7 +8,6 @@
#include <linux/linkage.h>
#include <linux/wait.h>
#include <linux/spinlock.h>
-#include <linux/rwsem.h>
#include <asm/system.h>
#include <asm/atomic.h>
diff --git a/include/asm-i386/semaphore.h b/include/asm-i386/semaphore.h
index 4e34a46..9519808 100644
--- a/include/asm-i386/semaphore.h
+++ b/include/asm-i386/semaphore.h
@@ -39,7 +39,6 @@
#include <asm/system.h>
#include <asm/atomic.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
atomic_t count;
diff --git a/include/asm-ia64/semaphore.h b/include/asm-ia64/semaphore.h
index f483eeb..cc78532 100644
--- a/include/asm-ia64/semaphore.h
+++ b/include/asm-ia64/semaphore.h
@@ -7,7 +7,6 @@
*/
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <asm/atomic.h>
diff --git a/include/asm-m32r/semaphore.h b/include/asm-m32r/semaphore.h
index 41e45d7..34f22d3 100644
--- a/include/asm-m32r/semaphore.h
+++ b/include/asm-m32r/semaphore.h
@@ -13,7 +13,6 @@
*/
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <asm/assembler.h>
#include <asm/system.h>
#include <asm/atomic.h>
diff --git a/include/asm-m68k/semaphore.h b/include/asm-m68k/semaphore.h
index fd4c7cc..5bf8af0 100644
--- a/include/asm-m68k/semaphore.h
+++ b/include/asm-m68k/semaphore.h
@@ -8,7 +8,6 @@
#include <linux/linkage.h>
#include <linux/wait.h>
#include <linux/spinlock.h>
-#include <linux/rwsem.h>
#include <linux/stringify.h>
#include <asm/system.h>
diff --git a/include/asm-m68knommu/semaphore.h b/include/asm-m68knommu/semaphore.h
index 5cc1fdd..b9fe03c 100644
--- a/include/asm-m68knommu/semaphore.h
+++ b/include/asm-m68knommu/semaphore.h
@@ -8,7 +8,6 @@
#include <linux/linkage.h>
#include <linux/wait.h>
#include <linux/spinlock.h>
-#include <linux/rwsem.h>
#include <asm/system.h>
#include <asm/atomic.h>
diff --git a/include/asm-mips/semaphore.h b/include/asm-mips/semaphore.h
index 3d6aa7c..1e598b4 100644
--- a/include/asm-mips/semaphore.h
+++ b/include/asm-mips/semaphore.h
@@ -15,19 +15,11 @@
#ifndef __ASM_SEMAPHORE_H
#define __ASM_SEMAPHORE_H
-/*
- * Remove spinlock-based RW semaphores; RW semaphore definitions are
- * now in rwsem.h and we use the generic lib/rwsem.c implementation.
- * Rework semaphores to use atomic_dec_if_positive.
- * -- Paul Mackerras (paulus@...ba.org)
- */
-
#ifdef __KERNEL__
#include <asm/atomic.h>
#include <asm/system.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
/*
diff --git a/include/asm-parisc/semaphore.h b/include/asm-parisc/semaphore.h
index d45827a..ad4ddd5 100644
--- a/include/asm-parisc/semaphore.h
+++ b/include/asm-parisc/semaphore.h
@@ -26,7 +26,6 @@
#include <linux/spinlock.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <asm/system.h>
diff --git a/include/asm-powerpc/semaphore.h b/include/asm-powerpc/semaphore.h
index 57369d2..37e4cb0 100644
--- a/include/asm-powerpc/semaphore.h
+++ b/include/asm-powerpc/semaphore.h
@@ -1,19 +1,11 @@
#ifndef _ASM_POWERPC_SEMAPHORE_H
#define _ASM_POWERPC_SEMAPHORE_H
-/*
- * Remove spinlock-based RW semaphores; RW semaphore definitions are
- * now in rwsem.h and we use the generic lib/rwsem.c implementation.
- * Rework semaphores to use atomic_dec_if_positive.
- * -- Paul Mackerras (paulus@...ba.org)
- */
-
#ifdef __KERNEL__
#include <asm/atomic.h>
#include <asm/system.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
/*
diff --git a/include/asm-s390/semaphore.h b/include/asm-s390/semaphore.h
index dbce058..77f21c3 100644
--- a/include/asm-s390/semaphore.h
+++ b/include/asm-s390/semaphore.h
@@ -14,7 +14,6 @@
#include <asm/system.h>
#include <asm/atomic.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
/*
diff --git a/include/asm-sh/semaphore.h b/include/asm-sh/semaphore.h
index 489f784..ca15c26 100644
--- a/include/asm-sh/semaphore.h
+++ b/include/asm-sh/semaphore.h
@@ -14,7 +14,6 @@
*/
#include <linux/spinlock.h>
-#include <linux/rwsem.h>
#include <linux/wait.h>
#include <asm/system.h>
diff --git a/include/asm-sh64/semaphore.h b/include/asm-sh64/semaphore.h
index 4695264..36de2f2 100644
--- a/include/asm-sh64/semaphore.h
+++ b/include/asm-sh64/semaphore.h
@@ -22,7 +22,6 @@
#include <linux/linkage.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <asm/system.h>
#include <asm/atomic.h>
diff --git a/include/asm-sparc/semaphore.h b/include/asm-sparc/semaphore.h
index f74ba31..8943ef6 100644
--- a/include/asm-sparc/semaphore.h
+++ b/include/asm-sparc/semaphore.h
@@ -7,7 +7,6 @@
#include <asm/atomic.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
atomic24_t count;
diff --git a/include/asm-sparc64/semaphore.h b/include/asm-sparc64/semaphore.h
index 093dcc6..869caa1 100644
--- a/include/asm-sparc64/semaphore.h
+++ b/include/asm-sparc64/semaphore.h
@@ -11,7 +11,6 @@
#include <asm/atomic.h>
#include <asm/system.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
atomic_t count;
diff --git a/include/asm-v850/semaphore.h b/include/asm-v850/semaphore.h
index 735baaf..f03edff 100644
--- a/include/asm-v850/semaphore.h
+++ b/include/asm-v850/semaphore.h
@@ -4,7 +4,6 @@
#include <linux/linkage.h>
#include <linux/spinlock.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <asm/atomic.h>
diff --git a/include/asm-x86_64/semaphore.h b/include/asm-x86_64/semaphore.h
index 1194888..f5fed78 100644
--- a/include/asm-x86_64/semaphore.h
+++ b/include/asm-x86_64/semaphore.h
@@ -38,9 +38,7 @@
#include <asm/system.h>
#include <asm/atomic.h>
-#include <asm/rwlock.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
#include <linux/stringify.h>
struct semaphore {
diff --git a/include/asm-xtensa/semaphore.h b/include/asm-xtensa/semaphore.h
index f10c348..4a75abc 100644
--- a/include/asm-xtensa/semaphore.h
+++ b/include/asm-xtensa/semaphore.h
@@ -14,7 +14,6 @@
#include <asm/atomic.h>
#include <asm/system.h>
#include <linux/wait.h>
-#include <linux/rwsem.h>
struct semaphore {
atomic_t count;
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
http://fsdev.net/wiki/index.php?title=Main_Page
========================================================================
-
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