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exit/bdflush: Remove the deprecated bdflush system call

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The bdflush system call has been deprecated for a very long time.
Recently Michael Schmitz tested[1] and found that the last known
caller of of the bdflush system call is unaffected by it's removal.

Since the code is not needed delete it.

[1] https://lkml.kernel.org/r/36123b5d-daa0-6c2b-f2d4-a942f069fd54@gmail.com
Link: https://lkml.kernel.org/r/87sg10quue.fsf_-_@disp2133
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2021-06-29 15:11:44 -05:00
parent e73f0f0ee7
commit b48c7236b1
20 changed files with 16 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

2
arch/alpha/kernel/syscalls/syscall.tbl
View file

@ -230,7 +230,7 @@
259 common osf_swapctl sys_ni_syscall 259 common osf_swapctl sys_ni_syscall
260 common osf_memcntl sys_ni_syscall 260 common osf_memcntl sys_ni_syscall
261 common osf_fdatasync sys_ni_syscall 261 common osf_fdatasync sys_ni_syscall
300 common bdflush sys_bdflush 300 common bdflush sys_ni_syscall
301 common sethae sys_sethae 301 common sethae sys_sethae
302 common mount sys_mount 302 common mount sys_mount
303 common old_adjtimex sys_old_adjtimex 303 common old_adjtimex sys_old_adjtimex

2
arch/arm/tools/syscall.tbl
View file

@ -147,7 +147,7 @@
131 common quotactl sys_quotactl 131 common quotactl sys_quotactl
132 common getpgid sys_getpgid 132 common getpgid sys_getpgid
133 common fchdir sys_fchdir 133 common fchdir sys_fchdir
134 common bdflush sys_bdflush 134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs 135 common sysfs sys_sysfs
136 common personality sys_personality 136 common personality sys_personality
# 137 was sys_afs_syscall # 137 was sys_afs_syscall

2
arch/arm64/include/asm/unistd32.h
View file

@ -279,7 +279,7 @@ __SYSCALL(__NR_getpgid, sys_getpgid)
#define __NR_fchdir 133 #define __NR_fchdir 133
__SYSCALL(__NR_fchdir, sys_fchdir) __SYSCALL(__NR_fchdir, sys_fchdir)
#define __NR_bdflush 134 #define __NR_bdflush 134
__SYSCALL(__NR_bdflush, sys_bdflush) __SYSCALL(__NR_bdflush, sys_ni_syscall)
#define __NR_sysfs 135 #define __NR_sysfs 135
__SYSCALL(__NR_sysfs, sys_sysfs) __SYSCALL(__NR_sysfs, sys_sysfs)
#define __NR_personality 136 #define __NR_personality 136

2
arch/ia64/kernel/syscalls/syscall.tbl
View file

@ -123,7 +123,7 @@
# 1135 was get_kernel_syms # 1135 was get_kernel_syms
# 1136 was query_module # 1136 was query_module
113 common quotactl sys_quotactl 113 common quotactl sys_quotactl
114 common bdflush sys_bdflush 114 common bdflush sys_ni_syscall
115 common sysfs sys_sysfs 115 common sysfs sys_sysfs
116 common personality sys_personality 116 common personality sys_personality
117 common afs_syscall sys_ni_syscall 117 common afs_syscall sys_ni_syscall

2
arch/m68k/kernel/syscalls/syscall.tbl
View file

@ -141,7 +141,7 @@
131 common quotactl sys_quotactl 131 common quotactl sys_quotactl
132 common getpgid sys_getpgid 132 common getpgid sys_getpgid
133 common fchdir sys_fchdir 133 common fchdir sys_fchdir
134 common bdflush sys_bdflush 134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs 135 common sysfs sys_sysfs
136 common personality sys_personality 136 common personality sys_personality
# 137 was afs_syscall # 137 was afs_syscall

2
arch/microblaze/kernel/syscalls/syscall.tbl
View file

@ -141,7 +141,7 @@
131 common quotactl sys_quotactl 131 common quotactl sys_quotactl
132 common getpgid sys_getpgid 132 common getpgid sys_getpgid
133 common fchdir sys_fchdir 133 common fchdir sys_fchdir
134 common bdflush sys_bdflush 134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs 135 common sysfs sys_sysfs
136 common personality sys_personality 136 common personality sys_personality
137 common afs_syscall sys_ni_syscall 137 common afs_syscall sys_ni_syscall

2
arch/mips/kernel/syscalls/syscall_o32.tbl
View file

@ -145,7 +145,7 @@
131 o32 quotactl sys_quotactl 131 o32 quotactl sys_quotactl
132 o32 getpgid sys_getpgid 132 o32 getpgid sys_getpgid
133 o32 fchdir sys_fchdir 133 o32 fchdir sys_fchdir
134 o32 bdflush sys_bdflush 134 o32 bdflush sys_ni_syscall
135 o32 sysfs sys_sysfs 135 o32 sysfs sys_sysfs
136 o32 personality sys_personality sys_32_personality 136 o32 personality sys_personality sys_32_personality
137 o32 afs_syscall sys_ni_syscall 137 o32 afs_syscall sys_ni_syscall

2
arch/parisc/kernel/syscalls/syscall.tbl
View file

@ -147,7 +147,7 @@
131 common quotactl sys_quotactl 131 common quotactl sys_quotactl
132 common getpgid sys_getpgid 132 common getpgid sys_getpgid
133 common fchdir sys_fchdir 133 common fchdir sys_fchdir
134 common bdflush sys_bdflush 134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs 135 common sysfs sys_sysfs
136 32 personality parisc_personality 136 32 personality parisc_personality
136 64 personality sys_personality 136 64 personality sys_personality

2
arch/powerpc/kernel/syscalls/syscall.tbl
View file

@ -176,7 +176,7 @@
131 nospu quotactl sys_quotactl 131 nospu quotactl sys_quotactl
132 common getpgid sys_getpgid 132 common getpgid sys_getpgid
133 common fchdir sys_fchdir 133 common fchdir sys_fchdir
134 common bdflush sys_bdflush 134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs 135 common sysfs sys_sysfs
136 32 personality sys_personality ppc64_personality 136 32 personality sys_personality ppc64_personality
136 64 personality ppc64_personality 136 64 personality ppc64_personality

2
arch/s390/kernel/syscalls/syscall.tbl
View file

@ -122,7 +122,7 @@
131 common quotactl sys_quotactl sys_quotactl 131 common quotactl sys_quotactl sys_quotactl
132 common getpgid sys_getpgid sys_getpgid 132 common getpgid sys_getpgid sys_getpgid
133 common fchdir sys_fchdir sys_fchdir 133 common fchdir sys_fchdir sys_fchdir
134 common bdflush sys_bdflush sys_bdflush 134 common bdflush sys_ni_syscall sys_ni_syscall
135 common sysfs sys_sysfs sys_sysfs 135 common sysfs sys_sysfs sys_sysfs
136 common personality sys_s390_personality sys_s390_personality 136 common personality sys_s390_personality sys_s390_personality
137 common afs_syscall - - 137 common afs_syscall - -

2
arch/sh/kernel/syscalls/syscall.tbl
View file

@ -141,7 +141,7 @@
131 common quotactl sys_quotactl 131 common quotactl sys_quotactl
132 common getpgid sys_getpgid 132 common getpgid sys_getpgid
133 common fchdir sys_fchdir 133 common fchdir sys_fchdir
134 common bdflush sys_bdflush 134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs 135 common sysfs sys_sysfs
136 common personality sys_personality 136 common personality sys_personality
# 137 was afs_syscall # 137 was afs_syscall

2
arch/sparc/kernel/syscalls/syscall.tbl
View file

@ -270,7 +270,7 @@
222 common delete_module sys_delete_module 222 common delete_module sys_delete_module
223 common get_kernel_syms sys_ni_syscall 223 common get_kernel_syms sys_ni_syscall
224 common getpgid sys_getpgid 224 common getpgid sys_getpgid
225 common bdflush sys_bdflush 225 common bdflush sys_ni_syscall
226 common sysfs sys_sysfs 226 common sysfs sys_sysfs
227 common afs_syscall sys_nis_syscall 227 common afs_syscall sys_nis_syscall
228 common setfsuid sys_setfsuid16 228 common setfsuid sys_setfsuid16

2
arch/x86/entry/syscalls/syscall_32.tbl
View file

@ -145,7 +145,7 @@
131 i386 quotactl sys_quotactl 131 i386 quotactl sys_quotactl
132 i386 getpgid sys_getpgid 132 i386 getpgid sys_getpgid
133 i386 fchdir sys_fchdir 133 i386 fchdir sys_fchdir
134 i386 bdflush sys_bdflush 134 i386 bdflush sys_ni_syscall
135 i386 sysfs sys_sysfs 135 i386 sysfs sys_sysfs
136 i386 personality sys_personality 136 i386 personality sys_personality
137 i386 afs_syscall 137 i386 afs_syscall

2
arch/xtensa/kernel/syscalls/syscall.tbl
View file

@ -223,7 +223,7 @@
# 205 was old nfsservctl # 205 was old nfsservctl
205 common nfsservctl sys_ni_syscall 205 common nfsservctl sys_ni_syscall
206 common _sysctl sys_ni_syscall 206 common _sysctl sys_ni_syscall
207 common bdflush sys_bdflush 207 common bdflush sys_ni_syscall
208 common uname sys_newuname 208 common uname sys_newuname
209 common sysinfo sys_sysinfo 209 common sysinfo sys_sysinfo
210 common init_module sys_init_module 210 common init_module sys_init_module

27
fs/buffer.c
View file

@ -3267,33 +3267,6 @@ out:
} }
EXPORT_SYMBOL(try_to_free_buffers); EXPORT_SYMBOL(try_to_free_buffers);
/*
* There are no bdflush tunables left. But distributions are
* still running obsolete flush daemons, so we terminate them here.
*
* Use of bdflush() is deprecated and will be removed in a future kernel.
* The `flush-X' kernel threads fully replace bdflush daemons and this call.
*/
SYSCALL_DEFINE2(bdflush, int, func, long, data)
{
static int msg_count;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (msg_count < 5) {
msg_count++;
printk(KERN_INFO
"warning: process `%s' used the obsolete bdflush"
" system call\n", current->comm);
printk(KERN_INFO "Fix your initscripts?\n");
}
if (func == 1)
do_exit(0);
return 0;
}
/* /*
* Buffer-head allocation * Buffer-head allocation
*/ */

1
include/linux/syscalls.h
View file

@ -1158,7 +1158,6 @@ asmlinkage long sys_ustat(unsigned dev, struct ustat __user *ubuf);
asmlinkage long sys_vfork(void); asmlinkage long sys_vfork(void);
asmlinkage long sys_recv(int, void __user *, size_t, unsigned); asmlinkage long sys_recv(int, void __user *, size_t, unsigned);
asmlinkage long sys_send(int, void __user *, size_t, unsigned); asmlinkage long sys_send(int, void __user *, size_t, unsigned);
asmlinkage long sys_bdflush(int func, long data);
asmlinkage long sys_oldumount(char __user *name); asmlinkage long sys_oldumount(char __user *name);
asmlinkage long sys_uselib(const char __user *library); asmlinkage long sys_uselib(const char __user *library);
asmlinkage long sys_sysfs(int option, asmlinkage long sys_sysfs(int option,

1
include/uapi/linux/capability.h
View file

@ -243,7 +243,6 @@ struct vfs_ns_cap_data {
/* Allow examination and configuration of disk quotas */ /* Allow examination and configuration of disk quotas */
/* Allow setting the domainname */ /* Allow setting the domainname */
/* Allow setting the hostname */ /* Allow setting the hostname */
/* Allow calling bdflush() */
/* Allow mount() and umount(), setting up new smb connection */ /* Allow mount() and umount(), setting up new smb connection */
/* Allow some autofs root ioctls */ /* Allow some autofs root ioctls */
/* Allow nfsservctl */ /* Allow nfsservctl */

1
kernel/sys_ni.c
View file

@ -416,7 +416,6 @@ COND_SYSCALL(epoll_wait);
COND_SYSCALL(recv); COND_SYSCALL(recv);
COND_SYSCALL_COMPAT(recv); COND_SYSCALL_COMPAT(recv);
COND_SYSCALL(send); COND_SYSCALL(send);
COND_SYSCALL(bdflush);
COND_SYSCALL(uselib); COND_SYSCALL(uselib);
/* optional: time32 */ /* optional: time32 */

2
tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
View file

@ -176,7 +176,7 @@
131 nospu quotactl sys_quotactl 131 nospu quotactl sys_quotactl
132 common getpgid sys_getpgid 132 common getpgid sys_getpgid
133 common fchdir sys_fchdir 133 common fchdir sys_fchdir
134 common bdflush sys_bdflush 134 common bdflush sys_ni_syscall
135 common sysfs sys_sysfs 135 common sysfs sys_sysfs
136 32 personality sys_personality ppc64_personality 136 32 personality sys_personality ppc64_personality
136 64 personality ppc64_personality 136 64 personality ppc64_personality

2
tools/perf/arch/s390/entry/syscalls/syscall.tbl
View file

@ -122,7 +122,7 @@
131 common quotactl sys_quotactl sys_quotactl 131 common quotactl sys_quotactl sys_quotactl
132 common getpgid sys_getpgid sys_getpgid 132 common getpgid sys_getpgid sys_getpgid
133 common fchdir sys_fchdir sys_fchdir 133 common fchdir sys_fchdir sys_fchdir
134 common bdflush sys_bdflush sys_bdflush 134 common bdflush - -
135 common sysfs sys_sysfs sys_sysfs 135 common sysfs sys_sysfs sys_sysfs
136 common personality sys_s390_personality sys_s390_personality 136 common personality sys_s390_personality sys_s390_personality
137 common afs_syscall - - 137 common afs_syscall - -