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| author | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-05-17 00:15:34 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-17 08:51:59 -0700 |
| commit | 39eb7e9791866973dbb7a3a6d2061d70356c7d90 (patch) | |
| tree | bfd4e74f43031fa0ae05636c215a3a60a7f5ae23 /Documentation/ramoops.txt | |
| parent | 896fc1f0c4c6c19b270734f274be67cb0e8a24af (diff) | |
| download | linux-39eb7e9791866973dbb7a3a6d2061d70356c7d90.tar.bz2 | |
pstore/ram: Add ECC support
This is now straightforward: just introduce a module parameter and pass
the needed value to persistent_ram_new().
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: Marco Stornelli <marco.stornelli@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ramoops.txt')
| -rw-r--r-- | Documentation/ramoops.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/ramoops.txt b/Documentation/ramoops.txt index 470d2c4db6ff..4ba7db231cb2 100644 --- a/Documentation/ramoops.txt +++ b/Documentation/ramoops.txt @@ -30,6 +30,11 @@ variable while setting 0 in that variable dumps only the panics. The module uses a counter to record multiple dumps but the counter gets reset on restart (i.e. new dumps after the restart will overwrite old ones). +Ramoops also supports software ECC protection of persistent memory regions. +This might be useful when a hardware reset was used to bring the machine back +to life (i.e. a watchdog triggered). In such cases, RAM may be somewhat +corrupt, but usually it is restorable. + 2. Setting the parameters Setting the ramoops parameters can be done in 2 different manners: @@ -46,6 +51,7 @@ static struct ramoops_platform_data ramoops_data = { .mem_address = <...>, .record_size = <...>, .dump_oops = <...>, + .ecc = <...>, }; static struct platform_device ramoops_dev = { |