mirror of https://gitee.com/openkylin/linux.git
40 lines
931 B
C
40 lines
931 B
C
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/*
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* lib/bust_spinlocks.c
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*
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* Provides a minimal bust_spinlocks for architectures which don't have one of their own.
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*
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* bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
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* and panic() information from reaching the user.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/tty.h>
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#include <linux/wait.h>
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#include <linux/vt_kern.h>
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void bust_spinlocks(int yes)
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{
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if (yes) {
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oops_in_progress = 1;
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} else {
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int loglevel_save = console_loglevel;
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#ifdef CONFIG_VT
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unblank_screen();
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#endif
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oops_in_progress = 0;
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/*
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* OK, the message is on the console. Now we call printk()
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* without oops_in_progress set so that printk() will give klogd
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* and the blanked console a poke. Hold onto your hats...
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*/
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console_loglevel = 15; /* NMI oopser may have shut the console up */
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printk(" ");
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console_loglevel = loglevel_save;
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}
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}
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