um: remove IRQF_SAMPLE_RANDOM which is now a no-op

With the changes in the random tree, IRQF_SAMPLE_RANDOM is now a
no-op; interrupt randomness is now collected unconditionally in a very
low-overhead fashion; see commit 775f4b297b.  The IRQF_SAMPLE_RANDOM
flag was scheduled to be removed in 2009 on the
feature-removal-schedule, so this patch is preparation for the final
removal of this flag.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>

5 files changed, 11 insertions, 17 deletions

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index acfd0e0fd0c9..ac9d25c8dc01 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -362,18 +362,18 @@ static irqreturn_t line_write_interrupt(int irq, void *data)
 int line_setup_irq(int fd, int input, int output, struct line *line, void *data)
 {
         const struct line_driver *driver = line->driver;
-        int err = 0, flags = IRQF_SHARED | IRQF_SAMPLE_RANDOM;
+        int err = 0;
 
         if (input)
                 err = um_request_irq(driver->read_irq, fd, IRQ_READ,
-                                       line_interrupt, flags,
-                                       driver->read_irq_name, data);
+                                     line_interrupt, IRQF_SHARED,
+                                     driver->read_irq_name, data);
         if (err)
                 return err;
         if (output)
                 err = um_request_irq(driver->write_irq, fd, IRQ_WRITE,
-                                        line_write_interrupt, flags,
-                                        driver->write_irq_name, data);
+                                     line_write_interrupt, IRQF_SHARED,
+                                     driver->write_irq_name, data);
         return err;
 }
 
@@ -779,8 +779,7 @@ void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty,
                                    .stack       = stack });
 
         if (um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,
-                           IRQF_SHARED | IRQF_SAMPLE_RANDOM,
-                           "winch", winch) < 0) {
+                           IRQF_SHARED, "winch", winch) < 0) {
                 printk(KERN_ERR "register_winch_irq - failed to register "
                        "IRQ\n");
                 goto out_free;
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index 88e466b159dc..e1c519790b5c 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -775,8 +775,7 @@ static int __init mconsole_init(void)
         register_reboot_notifier(&reboot_notifier);
 
         err = um_request_irq(MCONSOLE_IRQ, sock, IRQ_READ, mconsole_interrupt,
-                             IRQF_SHARED | IRQF_SAMPLE_RANDOM,
-                             "mconsole", (void *)sock);
+                             IRQF_SHARED, "mconsole", (void *)sock);
         if (err) {
                 printk(KERN_ERR "Failed to get IRQ for management console\n");
                 goto out;
diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c
index 11866ffd45a9..1d83d50236e1 100644
--- a/arch/um/drivers/port_kern.c
+++ b/arch/um/drivers/port_kern.c
@@ -100,8 +100,7 @@ static int port_accept(struct port_list *port)
                   .port         = port });
 
         if (um_request_irq(TELNETD_IRQ, socket[0], IRQ_READ, pipe_interrupt,
-                          IRQF_SHARED | IRQF_SAMPLE_RANDOM,
-                          "telnetd", conn)) {
+                          IRQF_SHARED, "telnetd", conn)) {
                 printk(KERN_ERR "port_accept : failed to get IRQ for "
                        "telnetd\n");
                 goto out_free;
@@ -184,8 +183,7 @@ void *port_data(int port_num)
         }
 
         if (um_request_irq(ACCEPT_IRQ, fd, IRQ_READ, port_interrupt,
-                          IRQF_SHARED | IRQF_SAMPLE_RANDOM,
-                          "port", port)) {
+                          IRQF_SHARED, "port", port)) {
                 printk(KERN_ERR "Failed to get IRQ for port %d\n", port_num);
                 goto out_close;
         }
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index b25296e6218a..e32c6aa6396f 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -131,8 +131,7 @@ static int __init rng_init (void)
         random_fd = err;
 
         err = um_request_irq(RANDOM_IRQ, random_fd, IRQ_READ, random_interrupt,
-                             IRQF_SAMPLE_RANDOM, "random",
-                             NULL);
+                             0, "random", NULL);
         if (err)
                 goto err_out_cleanup_hw;
 
diff --git a/arch/um/drivers/xterm_kern.c b/arch/um/drivers/xterm_kern.c
index b68bbe269e01..e3031e69445d 100644
--- a/arch/um/drivers/xterm_kern.c
+++ b/arch/um/drivers/xterm_kern.c
@@ -50,8 +50,7 @@ int xterm_fd(int socket, int *pid_out)
         init_completion(&data->ready);
 
         err = um_request_irq(XTERM_IRQ, socket, IRQ_READ, xterm_interrupt,
-                             IRQF_SHARED | IRQF_SAMPLE_RANDOM,
-                             "xterm", data);
+                             IRQF_SHARED, "xterm", data);
         if (err) {
                 printk(KERN_ERR "xterm_fd : failed to get IRQ for xterm, "
                        "err = %d\n",  err);