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| author | WeiXiong Liao <liaoweixiong@allwinnertech.com> | 2020-03-25 16:55:01 +0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2020-05-30 10:34:03 -0700 |
| commit | 34327e9fd213414b35eb70aa512c4e39b2095907 (patch) | |
| tree | 3c470eb01537affe06c7b85e127117ab60b15aa6 /fs/pstore/blk.c | |
| parent | cc9c4d1b5597167f8e8c92f6b61e1cda6d01884d (diff) | |
| download | linux-stable-34327e9fd213414b35eb70aa512c4e39b2095907.tar.gz linux-stable-34327e9fd213414b35eb70aa512c4e39b2095907.tar.bz2 linux-stable-34327e9fd213414b35eb70aa512c4e39b2095907.zip | |
pstore/zone,blk: Add ftrace frontend support
Support backend for ftrace. To enable ftrace backend, just make
ftrace_size be greater than 0 and a multiple of 4096.
Signed-off-by: WeiXiong Liao <liaoweixiong@allwinnertech.com>
Link: https://lore.kernel.org/lkml/20200511233229.27745-6-keescook@chromium.org/
Co-developed-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/lkml/20200512170719.221514-1-colin.king@canonical.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/pstore/blk.c')
| -rw-r--r-- | fs/pstore/blk.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/pstore/blk.c b/fs/pstore/blk.c index 082f6cdaf4bd..e0d95fb48428 100644 --- a/fs/pstore/blk.c +++ b/fs/pstore/blk.c @@ -43,6 +43,14 @@ static long console_size = -1; module_param(console_size, long, 0400); MODULE_PARM_DESC(console_size, "console size in kbytes"); +#if IS_ENABLED(CONFIG_PSTORE_FTRACE) +static long ftrace_size = CONFIG_PSTORE_BLK_FTRACE_SIZE; +#else +static long ftrace_size = -1; +#endif +module_param(ftrace_size, long, 0400); +MODULE_PARM_DESC(ftrace_size, "ftrace size in kbytes"); + /* * blkdev - the block device to use for pstore storage * @@ -152,6 +160,7 @@ static int psblk_register_do(struct pstore_device_info *dev) verify_size(kmsg_size, 4096, dev->flags & PSTORE_FLAGS_DMESG); verify_size(pmsg_size, 4096, dev->flags & PSTORE_FLAGS_PMSG); verify_size(console_size, 4096, dev->flags & PSTORE_FLAGS_CONSOLE); + verify_size(ftrace_size, 4096, dev->flags & PSTORE_FLAGS_FTRACE); #undef verify_size pstore_zone_info->total_size = dev->total_size; |