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authorAnton Vorontsov <avorontsov@ru.mvista.com>2009-09-22 19:49:27 -0400
committerAnton Vorontsov <avorontsov@ru.mvista.com>2009-09-22 19:49:27 -0400
commitf056878332a91ed984a116bad4e7d49aefff9e6e (patch)
tree572f4757c8e7811d45e0be0c2ae529c78fb63441 /Documentation/s390/s390dbf.txt
parent3961f7c3cf247eee5df7fabadc7a40f2deeb98f3 (diff)
parent7fa07729e439a6184bd824746d06a49cca553f15 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: drivers/power/wm97xx_battery.c
Diffstat (limited to 'Documentation/s390/s390dbf.txt')
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diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt
index 2d10053dd97e..ae66f9b90a25 100644
--- a/Documentation/s390/s390dbf.txt
+++ b/Documentation/s390/s390dbf.txt
@@ -495,6 +495,13 @@ and for each vararg a long value. So e.g. for a debug entry with a format
495string plus two varargs one would need to allocate a (3 * sizeof(long)) 495string plus two varargs one would need to allocate a (3 * sizeof(long))
496byte data area in the debug_register() function. 496byte data area in the debug_register() function.
497 497
498IMPORTANT: Using "%s" in sprintf event functions is dangerous. You can only
499use "%s" in the sprintf event functions, if the memory for the passed string is
500available as long as the debug feature exists. The reason behind this is that
501due to performance considerations only a pointer to the string is stored in
502the debug feature. If you log a string that is freed afterwards, you will get
503an OOPS when inspecting the debug feature, because then the debug feature will
504access the already freed memory.
498 505
499NOTE: If using the sprintf view do NOT use other event/exception functions 506NOTE: If using the sprintf view do NOT use other event/exception functions
500than the sprintf-event and -exception functions. 507than the sprintf-event and -exception functions.