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Message-ID: <20071206170642.GA7435@c2.user-mode-linux.org>
Date: Thu, 6 Dec 2007 12:06:42 -0500
From: Jeff Dike <jdike@...toit.com>
To: Andrew Morton <akpm@...l.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 4/6] UML - Miscellaneous code cleanups
Code tidying -
the pid field of struct irq_fd isn't used, so it is removed
os_set_fd_async needed to read flags before changing them, it
doesn't need a pid passed in because it can call getpid itself, and a
block of unused code needed deleting
os_get_exec_close was unused, so it is removed
ptrace_child called _exit for historical reasons which are no
longer valid, so just calls exit instead
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
arch/um/include/irq_user.h | 1 -
arch/um/include/os.h | 3 +--
arch/um/kernel/irq.c | 6 ++----
arch/um/kernel/ksyms.c | 1 -
arch/um/kernel/smp.c | 6 ++----
arch/um/os-Linux/file.c | 38 +++++++++++---------------------------
arch/um/os-Linux/start_up.c | 3 ++-
7 files changed, 18 insertions(+), 40 deletions(-)
Index: linux-2.6-git/arch/um/include/irq_user.h
===================================================================
--- linux-2.6-git.orig/arch/um/include/irq_user.h 2007-12-06 10:57:50.000000000 -0500
+++ linux-2.6-git/arch/um/include/irq_user.h 2007-12-06 11:00:55.000000000 -0500
@@ -14,7 +14,6 @@ struct irq_fd {
int fd;
int type;
int irq;
- int pid;
int events;
int current_events;
};
Index: linux-2.6-git/arch/um/kernel/irq.c
===================================================================
--- linux-2.6-git.orig/arch/um/kernel/irq.c 2007-12-06 10:57:50.000000000 -0500
+++ linux-2.6-git/arch/um/kernel/irq.c 2007-12-06 11:00:55.000000000 -0500
@@ -107,10 +107,9 @@ int activate_fd(int irq, int fd, int typ
struct pollfd *tmp_pfd;
struct irq_fd *new_fd, *irq_fd;
unsigned long flags;
- int pid, events, err, n;
+ int events, err, n;
- pid = os_getpid();
- err = os_set_fd_async(fd, pid);
+ err = os_set_fd_async(fd);
if (err < 0)
goto out;
@@ -127,7 +126,6 @@ int activate_fd(int irq, int fd, int typ
.fd = fd,
.type = type,
.irq = irq,
- .pid = pid,
.events = events,
.current_events = 0 } );
Index: linux-2.6-git/arch/um/kernel/smp.c
===================================================================
--- linux-2.6-git.orig/arch/um/kernel/smp.c 2007-12-06 10:57:50.000000000 -0500
+++ linux-2.6-git/arch/um/kernel/smp.c 2007-12-06 11:00:55.000000000 -0500
@@ -74,8 +74,7 @@ static int idle_proc(void *cpup)
if (err < 0)
panic("CPU#%d failed to create IPI pipe, err = %d", cpu, -err);
- os_set_fd_async(cpu_data[cpu].ipi_pipe[0],
- current->thread.mode.tt.extern_pid);
+ os_set_fd_async(cpu_data[cpu].ipi_pipe[0]);
wmb();
if (cpu_test_and_set(cpu, cpu_callin_map)) {
@@ -128,8 +127,7 @@ void smp_prepare_cpus(unsigned int maxcp
if (err < 0)
panic("CPU#0 failed to create IPI pipe, errno = %d", -err);
- os_set_fd_async(cpu_data[me].ipi_pipe[0],
- current->thread.mode.tt.extern_pid);
+ os_set_fd_async(cpu_data[me].ipi_pipe[0]);
for (cpu = 1; cpu < ncpus; cpu++) {
printk(KERN_INFO "Booting processor %d...\n", cpu);
Index: linux-2.6-git/arch/um/os-Linux/file.c
===================================================================
--- linux-2.6-git.orig/arch/um/os-Linux/file.c 2007-12-06 10:57:50.000000000 -0500
+++ linux-2.6-git/arch/um/os-Linux/file.c 2007-12-06 11:04:58.000000000 -0500
@@ -328,19 +328,6 @@ int os_file_modtime(const char *file, un
return 0;
}
-int os_get_exec_close(int fd, int *close_on_exec)
-{
- int ret;
-
- CATCH_EINTR(ret = fcntl(fd, F_GETFD));
-
- if(ret < 0)
- return -errno;
-
- *close_on_exec = (ret & FD_CLOEXEC) ? 1 : 0;
- return ret;
-}
-
int os_set_exec_close(int fd)
{
int err;
@@ -380,30 +367,27 @@ int os_pipe(int *fds, int stream, int cl
return err;
}
-int os_set_fd_async(int fd, int owner)
+int os_set_fd_async(int fd)
{
- int err;
+ int err, flags;
+
+ flags = fcntl(fd, F_GETFL);
+ if (flags < 0)
+ return -errno;
- /* XXX This should do F_GETFL first */
- if(fcntl(fd, F_SETFL, O_ASYNC | O_NONBLOCK) < 0){
+ flags |= O_ASYNC | O_NONBLOCK;
+ if (fcntl(fd, F_SETFL, flags) < 0) {
err = -errno;
printk("os_set_fd_async : failed to set O_ASYNC and "
"O_NONBLOCK on fd # %d, errno = %d\n", fd, errno);
return err;
}
-#ifdef notdef
- if(fcntl(fd, F_SETFD, 1) < 0){
- printk("os_set_fd_async : Setting FD_CLOEXEC failed, "
- "errno = %d\n", errno);
- }
-#endif
- if((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
- (fcntl(fd, F_SETOWN, owner) < 0)){
+ if ((fcntl(fd, F_SETSIG, SIGIO) < 0) ||
+ (fcntl(fd, F_SETOWN, os_getpid()) < 0)) {
err = -errno;
printk("os_set_fd_async : Failed to fcntl F_SETOWN "
- "(or F_SETSIG) fd %d to pid %d, errno = %d\n", fd,
- owner, errno);
+ "(or F_SETSIG) fd %d, errno = %d\n", fd, errno);
return err;
}
Index: linux-2.6-git/arch/um/include/os.h
===================================================================
--- linux-2.6-git.orig/arch/um/include/os.h 2007-12-06 10:57:50.000000000 -0500
+++ linux-2.6-git/arch/um/include/os.h 2007-12-06 11:00:55.000000000 -0500
@@ -127,7 +127,6 @@ static inline struct openflags of_cloexe
extern int os_stat_file(const char *file_name, struct uml_stat *buf);
extern int os_stat_fd(const int fd, struct uml_stat *buf);
extern int os_access(const char *file, int mode);
-extern int os_get_exec_close(int fd, int *close_on_exec);
extern int os_set_exec_close(int fd);
extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
extern int os_get_ifname(int fd, char *namebuf);
@@ -142,7 +141,7 @@ extern int os_write_file(int fd, const v
extern int os_file_size(const char *file, unsigned long long *size_out);
extern int os_file_modtime(const char *file, unsigned long *modtime);
extern int os_pipe(int *fd, int stream, int close_on_exec);
-extern int os_set_fd_async(int fd, int owner);
+extern int os_set_fd_async(int fd);
extern int os_clear_fd_async(int fd);
extern int os_set_fd_block(int fd, int blocking);
extern int os_accept_connection(int fd);
Index: linux-2.6-git/arch/um/kernel/ksyms.c
===================================================================
--- linux-2.6-git.orig/arch/um/kernel/ksyms.c 2007-12-06 10:57:50.000000000 -0500
+++ linux-2.6-git/arch/um/kernel/ksyms.c 2007-12-06 11:00:55.000000000 -0500
@@ -36,7 +36,6 @@ EXPORT_SYMBOL(uml_strdup);
EXPORT_SYMBOL(os_stat_fd);
EXPORT_SYMBOL(os_stat_file);
EXPORT_SYMBOL(os_access);
-EXPORT_SYMBOL(os_get_exec_close);
EXPORT_SYMBOL(os_set_exec_close);
EXPORT_SYMBOL(os_getpid);
EXPORT_SYMBOL(os_open_file);
Index: linux-2.6-git/arch/um/os-Linux/start_up.c
===================================================================
--- linux-2.6-git.orig/arch/um/os-Linux/start_up.c 2007-12-06 10:57:50.000000000 -0500
+++ linux-2.6-git/arch/um/os-Linux/start_up.c 2007-12-06 11:00:55.000000000 -0500
@@ -60,7 +60,8 @@ static int ptrace_child(void)
* the UML code itself.
*/
ret = 2;
- _exit(ret);
+
+ exit(ret);
}
static void fatal_perror(const char *str)
--
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