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| author | Paul Mundt <lethal@linux-sh.org> | 2009-09-16 13:48:32 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-09-16 13:48:32 +0900 |
| commit | ea88023b3491a384575ebcd5e8a449e841a28a24 (patch) | |
| tree | f46e3d8302e44dc55ce31823501e100472d29683 /Documentation/s390/s390dbf.txt | |
| parent | a6f15ade97989d414e9bf33874c9d5d1f39808ec (diff) | |
| parent | 0cb583fd2862f19ea88b02eb307d11c09e51e2f8 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/sh/kernel/vmlinux.lds.S
Diffstat (limited to 'Documentation/s390/s390dbf.txt')
| -rw-r--r-- | Documentation/s390/s390dbf.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt index 2d10053dd97..ae66f9b90a2 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 string plus two varargs one would need to allocate a (3 * sizeof(long)) byte data area in the debug_register() function. +IMPORTANT: Using "%s" in sprintf event functions is dangerous. You can only +use "%s" in the sprintf event functions, if the memory for the passed string is +available as long as the debug feature exists. The reason behind this is that +due to performance considerations only a pointer to the string is stored in +the debug feature. If you log a string that is freed afterwards, you will get +an OOPS when inspecting the debug feature, because then the debug feature will +access the already freed memory. NOTE: If using the sprintf view do NOT use other event/exception functions than the sprintf-event and -exception functions. |