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authorVasant Hegde <hegdevasant@linux.vnet.ibm.com>2014-08-09 11:15:30 +0530
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2014-08-13 15:13:44 +1000
commit14c4000a88afaaa2d0877cc86d42a74fde0f35e0 (patch)
treeb4133597b6990120a60302cf6b677b463bbc1752 /kernel
parent3609e09fd824c37df6f2bf13caa88f6f54a11922 (diff)
downloadop-kernel-dev-14c4000a88afaaa2d0877cc86d42a74fde0f35e0.zip
op-kernel-dev-14c4000a88afaaa2d0877cc86d42a74fde0f35e0.tar.gz
printk: Add function to return log buffer address and size
Platforms like IBM Power Systems supports service processor assisted dump. It provides interface to add memory region to be captured when system is crashed. During initialization/running we can add kernel memory region to be collected. Presently we don't have a way to get the log buffer base address and size. This patch adds support to return log buffer address and size. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/printk/printk.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index de1a6bb..e04c455 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -272,6 +272,18 @@ static char __log_buf[__LOG_BUF_LEN] __aligned(LOG_ALIGN);
static char *log_buf = __log_buf;
static u32 log_buf_len = __LOG_BUF_LEN;
+/* Return log buffer address */
+char *log_buf_addr_get(void)
+{
+ return log_buf;
+}
+
+/* Return log buffer size */
+u32 log_buf_len_get(void)
+{
+ return log_buf_len;
+}
+
/* human readable text of the record */
static char *log_text(const struct printk_log *msg)
{
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