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Date: Wed, 14 Oct 2009 15:45:01 GMT
From: tip-bot for Thomas Gleixner <tglx@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
schwidefsky@...ibm.com, tony.luck@...el.com, davem@...emloft.net,
benh@...nel.crashing.org, ralf@...ux-mips.org, tglx@...utronix.de
Subject: [tip:bkl/core] bkl: pushdown BKL locking to do_sysctl()
Commit-ID: e362106d6dcf6607906eff2260837748b1d6c8d5
Gitweb: http://git.kernel.org/tip/e362106d6dcf6607906eff2260837748b1d6c8d5
Author: Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Sat, 10 Oct 2009 15:37:06 +0000
Committer: Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 14 Oct 2009 15:31:41 +0200
bkl: pushdown BKL locking to do_sysctl()
Push lock/unlock_kernel() into do_sysctl() and remove it from all call
sites of do_sysctl().
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Acked-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: "David S. Miller" <davem@...emloft.net>
LKML-Reference: <20091010153349.925243928@...utronix.de>
---
arch/ia64/ia32/sys_ia32.c | 2 --
arch/mips/kernel/linux32.c | 2 --
arch/parisc/kernel/sys_parisc32.c | 2 --
arch/powerpc/kernel/sys_ppc32.c | 2 --
arch/s390/kernel/compat_linux.c | 2 --
arch/sparc/kernel/sys_sparc32.c | 2 --
arch/x86/ia32/sys_ia32.c | 2 --
kernel/sysctl.c | 6 ++++--
8 files changed, 4 insertions(+), 16 deletions(-)
diff --git a/arch/ia64/ia32/sys_ia32.c b/arch/ia64/ia32/sys_ia32.c
index 625ed8f..c0ed49c 100644
--- a/arch/ia64/ia32/sys_ia32.c
+++ b/arch/ia64/ia32/sys_ia32.c
@@ -1670,10 +1670,8 @@ sys32_sysctl (struct sysctl32 __user *args)
return -EFAULT;
set_fs(KERNEL_DS);
- lock_kernel();
ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *) &oldlen,
newvalp, (size_t) a32.newlen);
- unlock_kernel();
set_fs(old_fs);
if (oldvalp && put_user (oldlen, (int __user *) compat_ptr(a32.oldlenp)))
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 6242bc6..3744608 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -302,10 +302,8 @@ SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
oldlenp = (size_t __user *)addr;
}
- lock_kernel();
error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
- unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, (size_t __user *)addr) ||
diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index 561388b..0d3bff2 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -137,11 +137,9 @@ asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
oldlenp = (size_t *)addr;
}
- lock_kernel();
error = do_sysctl((int __user *)(u64)tmp.name, tmp.nlen,
(void __user *)(u64)tmp.oldval, oldlenp,
(void __user *)(u64)tmp.newval, tmp.newlen);
- unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, (size_t *)addr)) {
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index b97c2d6..934c0f9 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -555,11 +555,9 @@ asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
return -EFAULT;
}
- lock_kernel();
error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
compat_ptr(tmp.oldval), oldlenp,
compat_ptr(tmp.newval), tmp.newlen);
- unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, oldlenp) ||
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 0debcec..ef9c2c1 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -562,10 +562,8 @@ asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
oldlenp = (size_t __user *)addr;
}
- lock_kernel();
error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval),
oldlenp, compat_ptr(tmp.newval), tmp.newlen);
- unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, (size_t __user *)addr) ||
diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c
index 04e28b2..6266ef0 100644
--- a/arch/sparc/kernel/sys_sparc32.c
+++ b/arch/sparc/kernel/sys_sparc32.c
@@ -627,14 +627,12 @@ asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
oldlenp = (size_t __user *)addr;
}
- lock_kernel();
error = do_sysctl((int __user *)(unsigned long) tmp.name,
tmp.nlen,
(void __user *)(unsigned long) tmp.oldval,
oldlenp,
(void __user *)(unsigned long) tmp.newval,
tmp.newlen);
- unlock_kernel();
if (oldlenp) {
if (!error) {
if (get_user(oldlen, (size_t __user *)addr) ||
diff --git a/arch/x86/ia32/sys_ia32.c b/arch/x86/ia32/sys_ia32.c
index 9f55271..32a88e4 100644
--- a/arch/x86/ia32/sys_ia32.c
+++ b/arch/x86/ia32/sys_ia32.c
@@ -477,10 +477,8 @@ asmlinkage long sys32_sysctl(struct sysctl_ia32 __user *args32)
return -EFAULT;
set_fs(KERNEL_DS);
- lock_kernel();
ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
newvalp, (size_t) a32.newlen);
- unlock_kernel();
set_fs(old_fs);
if (oldvalp && put_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 0d949c5..72040e5 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1848,6 +1848,8 @@ int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *ol
return -EFAULT;
}
+ lock_kernel();
+
for (head = sysctl_head_next(NULL); head;
head = sysctl_head_next(head)) {
error = parse_table(name, nlen, oldval, oldlenp,
@@ -1858,6 +1860,8 @@ int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *ol
break;
}
}
+
+ unlock_kernel();
return error;
}
@@ -1873,10 +1877,8 @@ SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)
if (error)
goto out;
- lock_kernel();
error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp,
tmp.newval, tmp.newlen);
- unlock_kernel();
out:
return error;
}
--
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