From: Seiji Aguchi Date: Wed, 14 Nov 2012 20:26:21 +0000 (+0000) Subject: efi_pstore: Add a logic erasing entries to an erase callback X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~63^2~5 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd230fecab5e5833b11941f7f4a5732be78b1975;p=pandora-kernel.git efi_pstore: Add a logic erasing entries to an erase callback [Issue] Currently, efi_pstore driver simply overwrites existing panic messages in NVRAM. So, in the following scenario, we will lose 1st panic messages. 1. kernel panics. 2. efi_pstore is kicked and writes panic messages to NVRAM. 3. system reboots. 4. kernel panics again before a user checks the 1st panic messages in NVRAM. [Solution] A reasonable solution to fix the issue is just holding multiple logs without erasing existing entries. This patch freshly adds a logic erasing existing entries, which shared with a write callback, to an erase callback. To support holding multiple logs, the write callback doesn't need to erase any entries and it will be removed in a subsequent patch. Signed-off-by: Seiji Aguchi Acked-by: Mike Waychison Signed-off-by: Tony Luck --- Reading git-diff-tree failed