parisc: enhance warning regarding usage of O_NONBLOCK

Instead of showing only the very first application which needs
recompile, show all of them, but print them only once.

Includes typo fix noticed by Colin Ian King.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>

arch/parisc/include/asm/thread_info.h

@@ -48,6 +48,7 @@ struct thread_info {
 #define TIF_BLOCKSTEP		10	/* branch stepping? */
 #define TIF_SECCOMP		11	/* secure computing */
 #define TIF_SYSCALL_TRACEPOINT	12	/* syscall tracepoint instrumentation */
+#define TIF_NONBLOCK_WARNING	13	/* warned about wrong O_NONBLOCK usage */
 
 #define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
 #define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)

arch/parisc/kernel/sys_parisc.c

@@ -409,10 +409,12 @@ long parisc_personality(unsigned long personality)
 
 static int FIX_O_NONBLOCK(int flags)
 {
-	if (flags & O_NONBLOCK_MASK_OUT) {
-		struct task_struct *tsk = current;
-		pr_warn_once("%s(%d) uses a deprecated O_NONBLOCK value.\n",
-			tsk->comm, tsk->pid);
+	if ((flags & O_NONBLOCK_MASK_OUT) &&
+			!test_thread_flag(TIF_NONBLOCK_WARNING)) {
+		set_thread_flag(TIF_NONBLOCK_WARNING);
+		pr_warn("%s(%d) uses a deprecated O_NONBLOCK value."
+			" Please recompile with newer glibc.\n",
+			current->comm, current->pid);
 	}
 	return flags & ~O_NONBLOCK_MASK_OUT;
 }