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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-22 16:34:21 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-22 16:34:21 -0700 |
commit | fb09bafda67041b74a668dc9d77735e36bd33d3b (patch) | |
tree | 2dd32b65062a95045468fdcab366ecdb8e4fcac6 /drivers/staging/android/logger.c | |
parent | Merge tag 'tty-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty (diff) | |
parent | Staging: bcm: Remove two unused variables from Adapter.h (diff) | |
download | linux-dev-fb09bafda67041b74a668dc9d77735e36bd33d3b.tar.xz linux-dev-fb09bafda67041b74a668dc9d77735e36bd33d3b.zip |
Merge tag 'staging-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging tree changes from Greg Kroah-Hartman:
"Here is the big staging tree pull request for the 3.5-rc1 merge
window.
Loads of changes here, and we just narrowly added more lines than we
added:
622 files changed, 28356 insertions(+), 26059 deletions(-)
But, good news is that there is a number of subsystems that moved out
of the staging tree, to their respective "real" portions of the
kernel.
Code that moved out was:
- iio core code
- mei driver
- vme core and bridge drivers
There was one broken network driver that moved into staging as a step
before it is removed from the tree (pc300), and there was a few new
drivers added to the tree:
- new iio drivers
- gdm72xx wimax USB driver
- ipack subsystem and 2 drivers
All of the movements around have acks from the various subsystem
maintainers, and all of this has been in the linux-next tree for a
while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
Fixed up various trivial conflicts, along with a non-trivial one found
in -next and pointed out by Olof Johanssen: a clean - but incorrect -
merge of the arch/arm/boot/dts/at91sam9g20.dtsi file. Fix up manually
as per Stephen Rothwell.
* tag 'staging-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (536 commits)
Staging: bcm: Remove two unused variables from Adapter.h
Staging: bcm: Removes the volatile type definition from Adapter.h
Staging: bcm: Rename all "INT" to "int" in Adapter.h
Staging: bcm: Fix warning: __packed vs. __attribute__((packed)) in Adapter.h
Staging: bcm: Correctly format all comments in Adapter.h
Staging: bcm: Fix all whitespace issues in Adapter.h
Staging: bcm: Properly format braces in Adapter.h
Staging: ipack/bridges/tpci200: remove unneeded casts
Staging: ipack/bridges/tpci200: remove TPCI200_SHORTNAME constant
Staging: ipack: remove board_name and bus_name fields from struct ipack_device
Staging: ipack: improve the register of a bus and a device in the bus.
staging: comedi: cleanup all the comedi_driver 'detach' functions
staging: comedi: remove all 'default N' in Kconfig
staging: line6/config.h: Delete unused header
staging: gdm72xx depends on NET
staging: gdm72xx: Set up parent link in sysfs for gdm72xx devices
staging: drm/omap: initial dmabuf/prime import support
staging: drm/omap: dmabuf/prime mmap support
pstore/ram: Add ECC support
pstore/ram: Switch to persistent_ram routines
...
Diffstat (limited to 'drivers/staging/android/logger.c')
-rw-r--r-- | drivers/staging/android/logger.c | 113 |
1 files changed, 65 insertions, 48 deletions
diff --git a/drivers/staging/android/logger.c b/drivers/staging/android/logger.c index ea69b6a77dac..b2e71c6fd175 100644 --- a/drivers/staging/android/logger.c +++ b/drivers/staging/android/logger.c @@ -25,6 +25,7 @@ #include <linux/poll.h> #include <linux/slab.h> #include <linux/time.h> +#include <linux/vmalloc.h> #include "logger.h" #include <asm/ioctls.h> @@ -45,8 +46,12 @@ struct logger_log { size_t w_off; /* current write head offset */ size_t head; /* new readers start here */ size_t size; /* size of the log */ + struct list_head logs; /* list of log channels (myself)*/ }; +static LIST_HEAD(log_list); + + /* * struct logger_reader - a logging device open for reading * @@ -60,9 +65,9 @@ struct logger_reader { }; /* logger_offset - returns index 'n' into the log via (optimized) modulus */ -size_t logger_offset(struct logger_log *log, size_t n) +static size_t logger_offset(struct logger_log *log, size_t n) { - return n & (log->size-1); + return n & (log->size - 1); } @@ -348,7 +353,7 @@ static ssize_t do_write_log_from_user(struct logger_log *log, * writev(), and aio_write(). Writes are our fast path, and we try to optimize * them above all else. */ -ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov, +static ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t ppos) { struct logger_log *log = file_get_log(iocb->ki_filp); @@ -408,7 +413,15 @@ ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov, return ret; } -static struct logger_log *get_log_from_minor(int); +static struct logger_log *get_log_from_minor(int minor) +{ + struct logger_log *log; + + list_for_each_entry(log, &log_list, logs) + if (log->misc.minor == minor) + return log; + return NULL; +} /* * logger_open - the log's open() file operation @@ -565,80 +578,84 @@ static const struct file_operations logger_fops = { }; /* - * Defines a log structure with name 'NAME' and a size of 'SIZE' bytes, which - * must be a power of two, greater than LOGGER_ENTRY_MAX_LEN, and less than - * LONG_MAX minus LOGGER_ENTRY_MAX_LEN. + * Log size must be a power of two, greater than LOGGER_ENTRY_MAX_LEN, + * and less than LONG_MAX minus LOGGER_ENTRY_MAX_LEN. */ -#define DEFINE_LOGGER_DEVICE(VAR, NAME, SIZE) \ -static unsigned char _buf_ ## VAR[SIZE]; \ -static struct logger_log VAR = { \ - .buffer = _buf_ ## VAR, \ - .misc = { \ - .minor = MISC_DYNAMIC_MINOR, \ - .name = NAME, \ - .fops = &logger_fops, \ - .parent = NULL, \ - }, \ - .wq = __WAIT_QUEUE_HEAD_INITIALIZER(VAR .wq), \ - .readers = LIST_HEAD_INIT(VAR .readers), \ - .mutex = __MUTEX_INITIALIZER(VAR .mutex), \ - .w_off = 0, \ - .head = 0, \ - .size = SIZE, \ -}; +static int __init create_log(char *log_name, int size) +{ + int ret = 0; + struct logger_log *log; + unsigned char *buffer; -DEFINE_LOGGER_DEVICE(log_main, LOGGER_LOG_MAIN, 256*1024) -DEFINE_LOGGER_DEVICE(log_events, LOGGER_LOG_EVENTS, 256*1024) -DEFINE_LOGGER_DEVICE(log_radio, LOGGER_LOG_RADIO, 256*1024) -DEFINE_LOGGER_DEVICE(log_system, LOGGER_LOG_SYSTEM, 256*1024) + buffer = vmalloc(size); + if (buffer == NULL) + return -ENOMEM; -static struct logger_log *get_log_from_minor(int minor) -{ - if (log_main.misc.minor == minor) - return &log_main; - if (log_events.misc.minor == minor) - return &log_events; - if (log_radio.misc.minor == minor) - return &log_radio; - if (log_system.misc.minor == minor) - return &log_system; - return NULL; -} + log = kzalloc(sizeof(struct logger_log), GFP_KERNEL); + if (log == NULL) { + ret = -ENOMEM; + goto out_free_buffer; + } + log->buffer = buffer; -static int __init init_log(struct logger_log *log) -{ - int ret; + log->misc.minor = MISC_DYNAMIC_MINOR; + log->misc.name = kstrdup(log_name, GFP_KERNEL); + if (log->misc.name == NULL) { + ret = -ENOMEM; + goto out_free_log; + } + + log->misc.fops = &logger_fops; + log->misc.parent = NULL; + init_waitqueue_head(&log->wq); + INIT_LIST_HEAD(&log->readers); + mutex_init(&log->mutex); + log->w_off = 0; + log->head = 0; + log->size = size; + + INIT_LIST_HEAD(&log->logs); + list_add_tail(&log->logs, &log_list); + + /* finally, initialize the misc device for this log */ ret = misc_register(&log->misc); if (unlikely(ret)) { printk(KERN_ERR "logger: failed to register misc " "device for log '%s'!\n", log->misc.name); - return ret; + goto out_free_log; } printk(KERN_INFO "logger: created %luK log '%s'\n", (unsigned long) log->size >> 10, log->misc.name); return 0; + +out_free_log: + kfree(log); + +out_free_buffer: + vfree(buffer); + return ret; } static int __init logger_init(void) { int ret; - ret = init_log(&log_main); + ret = create_log(LOGGER_LOG_MAIN, 256*1024); if (unlikely(ret)) goto out; - ret = init_log(&log_events); + ret = create_log(LOGGER_LOG_EVENTS, 256*1024); if (unlikely(ret)) goto out; - ret = init_log(&log_radio); + ret = create_log(LOGGER_LOG_RADIO, 256*1024); if (unlikely(ret)) goto out; - ret = init_log(&log_system); + ret = create_log(LOGGER_LOG_SYSTEM, 256*1024); if (unlikely(ret)) goto out; |