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Commit 6af9f7bf authored by Fabian Frederick's avatar Fabian Frederick Committed by Linus Torvalds
Browse files

sys_sysfs: Add CONFIG_SYSFS_SYSCALL 



sys_sysfs is an obsolete system call no longer supported by libc.

 - This patch adds a default CONFIG_SYSFS_SYSCALL=y

 - Option can be turned off in expert mode.

 - cond_syscall added to kernel/sys_ni.c

[akpm@linux-foundation.org: tweak Kconfig help text]
Signed-off-by: default avatarFabian Frederick <fabf@skynet.be>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e3a0cfdc

fs/filesystems.c

+2 −0
Original line number Diff line number Diff line
@@ -121,6 +121,7 @@ int unregister_filesystem(struct file_system_type * fs) 


EXPORT_SYMBOL(unregister_filesystem);



#ifdef CONFIG_SYSFS_SYSCALL

static int fs_index(const char __user * __name)

{

	struct file_system_type * tmp;
@@ -199,6 +200,7 @@ SYSCALL_DEFINE3(sysfs, int, option, unsigned long, arg1, unsigned long, arg2) 
	}

	return retval;

}

#endif



int __init get_filesystem_list(char *buf)

{

init/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -1290,6 +1290,16 @@ config UID16 
	help

	  This enables the legacy 16-bit UID syscall wrappers.



config SYSFS_SYSCALL

	bool "Sysfs syscall support" if EXPERT

	default y

	---help---

	  sys_sysfs is an obsolete system call no longer supported in libc.

	  Note that disabling this option is more secure but might break

	  compatibility with some systems.



	  If unsure say Y here.



config SYSCTL_SYSCALL

	bool "Sysctl syscall support" if EXPERT

	depends on PROC_SYSCTL

kernel/sys_ni.c

+1 −0
Original line number Diff line number Diff line
@@ -146,6 +146,7 @@ cond_syscall(sys_io_destroy); 
cond_syscall(sys_io_submit);

cond_syscall(sys_io_cancel);

cond_syscall(sys_io_getevents);

cond_syscall(sys_sysfs);

cond_syscall(sys_syslog);

cond_syscall(sys_process_vm_readv);

cond_syscall(sys_process_vm_writev);