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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-05-07 00:00:56 (GMT) |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-05-09 10:22:58 (GMT) |
| commit | 24d9649574fbe591fdfa6b00893d4096f513e539 (patch) | |
| tree | de6b2a4b4e1d7754d4100404b4d74574be0a608e /arch/powerpc/kernel/btext.c | |
| parent | 1b70c5a6491dd02263e6d104b72d9b536f987021 (diff) | |
| download | linux-fsl-qoriq-24d9649574fbe591fdfa6b00893d4096f513e539.tar.xz | |
[POWERPC] Document when printk is useable
When debugging early boot problems, it's common to sprinkle printk's
all over the place. However, on 64-bit powerpc, this can lead to
memory corruption if done too early due to the PACA pointer and
lockdep core not being initialized.
This adds some comments to early_setup() that document when it is
safe to do so in order to save time for whoever has to debug that
stuff next.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/btext.c')
0 files changed, 0 insertions, 0 deletions