From 9e18fcdd346c6befdac360c047327fb058f33628 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Sun, 20 Nov 2005 18:49:08 +0100 Subject: [PATCH] [PATCH] Remove compat ioctl semaphore Originally for 2.6.16, but the semaphore causes problems for some people so get rid of it now. It's not needed anymore because the ioctl hash table is never changed at run time now. Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- fs/compat.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/fs/compat.c b/fs/compat.c index 8e71cdbecc7..0f7abf246d3 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -268,7 +268,6 @@ out: #define IOCTL_HASHSIZE 256 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; -static DECLARE_RWSEM(ioctl32_sem); extern struct ioctl_trans ioctl_start[]; extern int ioctl_table_size; @@ -390,14 +389,10 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, break; } - /* When register_ioctl32_conversion is finally gone remove - this lock! -AK */ - down_read(&ioctl32_sem); for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { if (t->cmd == cmd) goto found_handler; } - up_read(&ioctl32_sem); if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { @@ -417,11 +412,9 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, lock_kernel(); error = t->handler(fd, cmd, arg, filp); unlock_kernel(); - up_read(&ioctl32_sem); goto out_fput; } - up_read(&ioctl32_sem); do_ioctl: error = vfs_ioctl(filp, fd, cmd, arg); out_fput: -- 2.20.1