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path: root/drivers/mtd/mtdoops.c
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* [MTD] mtdoops.c: make struct oops_cxt static againAdrian Bunk2008-04-22
| | | | | | | | struct oops_cxt needlessly became global. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] Fix mtdoops.c compilationDavid Woodhouse2008-02-07
| | | | | | | drivers/mtd/mtdoops.c: In function ‘mtdoops_console_sync’: drivers/mtd/mtdoops.c:329: error: implicit declaration of function ‘in_interrupt’ Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops: Use the panic_write function when presentRichard Purdie2008-02-07
| | | | | | | When the MTD provides a panic_write function, use it. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops: Various minor cleanupsRichard Purdie2008-02-03
| | | | | | | | | | Various minor cleaups to mtdoops: * Don't support the mtd->erasesize < OOPS_PAGE_SIZE case * Tweak printks and make the device mtdoops connects to more visible * CON_PRINTBUFFER flag is uneeded Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops: Ensure sequential write to the bufferRichard Purdie2008-02-03
| | | | | | | | Add a spinlock to ensure writes to the mtdoops buffer memory are sequential and don't race. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops: Perform write operations in a workqueueRichard Purdie2008-02-03
| | | | | | | | | Writing to the flash needs to be done in a workqueue. The console write functions may be called in any context which can lead to lockups otherwise. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops: Add further error return code checkingRichard Purdie2008-02-03
| | | | | | | Add further error return code checks to the mtdoops driver. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops cleanupPeter Korsgaard2007-12-03
| | | | | | | Use memcpy instead of open coding a copy loop. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] mtdoops printk warning fixesAndrew Morton2007-08-22
| | | | | | | | | | | | drivers/mtd/mtdoops.c: In function 'mtdoops_inc_counter': drivers/mtd/mtdoops.c:109: warning: format '%d' expects type 'int', but argument 3 has type 'size_t' drivers/mtd/mtdoops.c: In function 'mtdoops_console_sync': drivers/mtd/mtdoops.c:277: warning: format '%d' expects type 'int', but argument 3 has type 'size_t' someone buy Dave an x86_64 box. Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] Add sync/unblank function to mtdoopsRichard Purdie2007-07-11
| | | | | | | | | | | | | mtdoops wasn't ensuring data was flushed to flash in crash situations after recent changes in mainline kernels as tracking the oops_in_progress variable was no longer enough. We can use the "unblank" console call as a sync call to tell us to write out the buffer though. Therefore add a sync function to mtdoops and call this when console unblank events occur. Signed-off-by: Richard Purdie <rpurdie@openedhand.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* [MTD] oops and panic message logging to MTD deviceRichard Purdie2007-06-28
Kernel oops and panic messages are invaluable when debugging crashes. These messages often don't make it to flash based logging methods (say a syslog on jffs2) due to the overheads involved in writing to flash. This patch allows you to turn an MTD partition into a circular log buffer where kernel oops and panic messages are written to. The messages are obtained by registering a console driver and checking oops_in_progress. Erases are performed in advance to maximise the chances of a saving messages. To activate it, add console=ttyMTDx to the kernel commandline (where x is the mtd device number to use). Signed-off-by: Richard Purdie <rpurdie@openedhand.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>