From 2fccfcc0c742625c01e6a3913f4fc2d330541fbb Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 2 Dec 2020 12:59:55 +0100 Subject: um: Remove IRQ_NONE type We don't actually use this in um_request_irq(), so it can never be assigned. It's also not clear what that would be useful for, so just remove it. This results in quite a number of cleanups, all the way to removing the "SIGIO on close" startup check, since the data it assigns (pty_close_sigio) is not used anymore. While at it, also make this an enum so we get a minimum of type checking, and remove the IRQ_NONE hack in virtio since we now no longer have the name twice. Acked-By: Anton Ivanov Signed-off-by: Johannes Berg Acked-By: Anton Ivanov Signed-off-by: Richard Weinberger --- arch/um/drivers/random.c | 2 +- arch/um/drivers/virtio_uml.c | 5 ----- arch/um/include/shared/irq_kern.h | 7 ++++--- arch/um/include/shared/irq_user.h | 9 +++++---- arch/um/include/shared/os.h | 6 +++--- arch/um/kernel/irq.c | 15 +++++++-------- arch/um/os-Linux/irq.c | 2 +- arch/um/os-Linux/sigio.c | 25 +++++-------------------- 8 files changed, 26 insertions(+), 45 deletions(-) diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c index bd3059adc2fb..433a3f8f2ef3 100644 --- a/arch/um/drivers/random.c +++ b/arch/um/drivers/random.c @@ -79,7 +79,7 @@ static int __init rng_init (void) if (err < 0) goto err_out_cleanup_hw; - sigio_broken(random_fd, 1); + sigio_broken(random_fd); hwrng.name = RNG_MODULE_NAME; hwrng.read = rng_dev_read; hwrng.quality = 1024; diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c index 94b112749d5b..27e92d3881ff 100644 --- a/arch/um/drivers/virtio_uml.c +++ b/arch/um/drivers/virtio_uml.c @@ -33,11 +33,6 @@ #include #include "vhost_user.h" -/* Workaround due to a conflict between irq_user.h and irqreturn.h */ -#ifdef IRQ_NONE -#undef IRQ_NONE -#endif - #define MAX_SUPPORTED_QUEUE_SIZE 256 #define to_virtio_uml_device(_vdev) \ diff --git a/arch/um/include/shared/irq_kern.h b/arch/um/include/shared/irq_kern.h index 7c04a0fd3a27..7807de593bda 100644 --- a/arch/um/include/shared/irq_kern.h +++ b/arch/um/include/shared/irq_kern.h @@ -8,11 +8,12 @@ #include #include +#include "irq_user.h" #define UM_IRQ_ALLOC -1 -int um_request_irq(int irq, int fd, int type, irq_handler_t handler, - unsigned long irqflags, const char * devname, - void *dev_id); +int um_request_irq(int irq, int fd, enum um_irq_type type, + irq_handler_t handler, unsigned long irqflags, + const char *devname, void *dev_id); void um_free_irq(int irq, void *dev_id); #endif diff --git a/arch/um/include/shared/irq_user.h b/arch/um/include/shared/irq_user.h index 5e975a9e8354..07239e801a5b 100644 --- a/arch/um/include/shared/irq_user.h +++ b/arch/um/include/shared/irq_user.h @@ -9,10 +9,11 @@ #include #include -#define IRQ_READ 0 -#define IRQ_WRITE 1 -#define IRQ_NONE 2 -#define NUM_IRQ_TYPES (IRQ_NONE + 1) +enum um_irq_type { + IRQ_READ, + IRQ_WRITE, + NUM_IRQ_TYPES, +}; struct siginfo; extern void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h index f467d28fc0b4..e2bb7e488d59 100644 --- a/arch/um/include/shared/os.h +++ b/arch/um/include/shared/os.h @@ -299,7 +299,7 @@ extern void reboot_skas(void); extern int os_waiting_for_events_epoll(void); extern void *os_epoll_get_data_pointer(int index); extern int os_epoll_triggered(int index, int events); -extern int os_event_mask(int irq_type); +extern int os_event_mask(enum um_irq_type irq_type); extern int os_setup_epoll(void); extern int os_add_epoll_fd(int events, int fd, void *data); extern int os_mod_epoll_fd(int events, int fd, void *data); @@ -310,8 +310,8 @@ extern void os_close_epoll_fd(void); /* sigio.c */ extern int add_sigio_fd(int fd); extern int ignore_sigio_fd(int fd); -extern void maybe_sigio_broken(int fd, int read); -extern void sigio_broken(int fd, int read); +extern void maybe_sigio_broken(int fd); +extern void sigio_broken(int fd); /* prctl.c */ extern int os_arch_prctl(int pid, int option, unsigned long *arg2); diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 93eb742ecafe..9e8f776bb43a 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -32,7 +32,7 @@ extern void free_irqs(void); struct irq_reg { void *id; - int type; + enum um_irq_type type; int irq; int events; bool active; @@ -96,7 +96,7 @@ void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) } for (i = 0; i < n ; i++) { - /* Epoll back reference is the entry with 3 irq_reg + /* Epoll back reference is the entry with 2 irq_reg * leaves - one for each irq type. */ irq_entry = (struct irq_entry *) @@ -139,7 +139,7 @@ static int assign_epoll_events_to_irq(struct irq_entry *irq_entry) -static int activate_fd(int irq, int fd, int type, void *dev_id) +static int activate_fd(int irq, int fd, enum um_irq_type type, void *dev_id) { struct irq_reg *new_fd; struct irq_entry *irq_entry; @@ -217,7 +217,7 @@ static int activate_fd(int irq, int fd, int type, void *dev_id) /* Turn back IO on with the correct (new) IO event mask */ assign_epoll_events_to_irq(irq_entry); spin_unlock_irqrestore(&irq_lock, flags); - maybe_sigio_broken(fd, (type != IRQ_NONE)); + maybe_sigio_broken(fd); return 0; out_unlock: @@ -444,10 +444,9 @@ void um_free_irq(int irq, void *dev) } EXPORT_SYMBOL(um_free_irq); -int um_request_irq(int irq, int fd, int type, - irq_handler_t handler, - unsigned long irqflags, const char * devname, - void *dev_id) +int um_request_irq(int irq, int fd, enum um_irq_type type, + irq_handler_t handler, unsigned long irqflags, + const char *devname, void *dev_id) { int err; diff --git a/arch/um/os-Linux/irq.c b/arch/um/os-Linux/irq.c index d508310ee5e1..aa90a05b3d78 100644 --- a/arch/um/os-Linux/irq.c +++ b/arch/um/os-Linux/irq.c @@ -45,7 +45,7 @@ int os_epoll_triggered(int index, int events) * access to the right includes/defines for EPOLL constants. */ -int os_event_mask(int irq_type) +int os_event_mask(enum um_irq_type irq_type) { if (irq_type == IRQ_READ) return EPOLLIN | EPOLLPRI; diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c index f91fd16e9911..79cd6d6d6211 100644 --- a/arch/um/os-Linux/sigio.c +++ b/arch/um/os-Linux/sigio.c @@ -338,7 +338,7 @@ out_close1: close(l_write_sigio_fds[1]); } -void sigio_broken(int fd, int read) +void sigio_broken(int fd) { int err; @@ -354,7 +354,7 @@ void sigio_broken(int fd, int read) all_sigio_fds.poll[all_sigio_fds.used++] = ((struct pollfd) { .fd = fd, - .events = read ? POLLIN : POLLOUT, + .events = POLLIN, .revents = 0 }); out: sigio_unlock(); @@ -362,17 +362,16 @@ out: /* Changed during early boot */ static int pty_output_sigio; -static int pty_close_sigio; -void maybe_sigio_broken(int fd, int read) +void maybe_sigio_broken(int fd) { if (!isatty(fd)) return; - if ((read || pty_output_sigio) && (!read || pty_close_sigio)) + if (pty_output_sigio) return; - sigio_broken(fd, read); + sigio_broken(fd); } static void sigio_cleanup(void) @@ -516,19 +515,6 @@ static void tty_output(int master, int slave) printk(UM_KERN_CONT "tty_output : read failed, err = %d\n", n); } -static void tty_close(int master, int slave) -{ - printk(UM_KERN_INFO "Checking that host ptys support SIGIO on " - "close..."); - - close(slave); - if (got_sigio) { - printk(UM_KERN_CONT "Yes\n"); - pty_close_sigio = 1; - } else - printk(UM_KERN_CONT "No, enabling workaround\n"); -} - static void __init check_sigio(void) { if ((access("/dev/ptmx", R_OK) < 0) && @@ -538,7 +524,6 @@ static void __init check_sigio(void) return; } check_one_sigio(tty_output); - check_one_sigio(tty_close); } /* Here because it only does the SIGIO testing for now */ -- cgit v1.2.3