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intr_disable() / intr_restore()

In Linux, I can use local_irq_save().

you can use callout. please refer to TIMEOUT(9) You can use callout. Please refer to timeout.

I know there is in_interrupt() function in linux. Is there such function in FreeBSD kernel space?

In my driver, I use sscanf() to create a string. I found the OS crashed. The test code is as following: char buffer2[100] = {1}; buffer2[0] = 1; buffer2[1] = 1; buffer2[2] = 1; buffer2[3] = 1; buffer2[4] = 1; buffer2[5] = 1...

#include <machine/stdarg.h> can work. Thanks doena and everyone.

In my driver, I use 'va_list' type to define variable, but, the compiler reports the following error: 'va_list' undeclared (first use in this function) Which header file should I include? thanks

Linux has tasklet, which is realized using softirq. So, does freebsd FreeBSD have such simlar mechanism?

thanks

thanks

I need such a spin lock in FreeBSD, which meets the following three condition: 1 don't sleep. 2 just spins while acquiring a lock. 3 don't disable local CPU interrupts. thanks

I find mtx_lock_spin() API will disable local CPU interrupts while holding a spin lock. In linux, while acquiring a spin lock, spin_lock_bh() API just spins, doesn't disables local CPU interrupts and never sleeps. Does FreeBSD have such API for spin lock? In other words, I need a spin lock...

pin user pages in memory: http://www.kernel.org/doc/htmldocs/kernel-api/API-get-user-pages.html

thanks I have found "taskqueue" which is simlar with work item. taskqueue

Hi SirDice, I am looking for the kernel APIs of work item for FreeBSD, such as INIT_WORK(), queue_work(). These kernel APIs are for Linux. thanks.

I just find a set of work item code for windows NDIS in FreeBSD kernel space. Are there a common implement and kernel APIs for work item? thanks

vslock() and bus_dmamap_load_uio() can finish the function of get_user_pages().

I use "ioctl syscall" to pass userland buffer into kernel driver.

I prepare to lock the userland buffer in kernel space and map its address into kernel virtual address. When I get the kernel virtual address, I can call DMA APIs to finish the remaining work. Can my idea work? Are there such kernel APIs, which can lock and map userland buffer in kernel space...

sysctl hw.ncpu? I need a API or method in kernel space. Such as num_online_cpus(), which is a Linux kernel API.