1 files changed, 11 insertions, 2 deletions

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index ec881b312700..2f389ce5023c 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -61,6 +61,11 @@ module_param(mem_size, ulong, 0400);
 MODULE_PARM_DESC(mem_size,
                 "size of reserved RAM used to store oops/panic logs");
 
+static unsigned int mem_type;
+module_param(mem_type, uint, 0600);
+MODULE_PARM_DESC(mem_type,
+                "set to 1 to try to use unbuffered memory (default 0)");
+
 static int dump_oops = 1;
 module_param(dump_oops, int, 0600);
 MODULE_PARM_DESC(dump_oops,
@@ -79,6 +84,7 @@ struct ramoops_context {
         struct persistent_ram_zone *fprz;
         phys_addr_t phys_addr;
         unsigned long size;
+        unsigned int memtype;
         size_t record_size;
         size_t console_size;
         size_t ftrace_size;
@@ -366,7 +372,8 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
                 size_t sz = cxt->record_size;
 
                 cxt->przs[i] = persistent_ram_new(*paddr, sz, 0,
-                                                  &cxt->ecc_info);
+                                                  &cxt->ecc_info,
+                                                  cxt->memtype);
                 if (IS_ERR(cxt->przs[i])) {
                         err = PTR_ERR(cxt->przs[i]);
                         dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n",
@@ -396,7 +403,7 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
                 return -ENOMEM;
         }
 
-        *prz = persistent_ram_new(*paddr, sz, sig, &cxt->ecc_info);
+        *prz = persistent_ram_new(*paddr, sz, sig, &cxt->ecc_info, cxt->memtype);
         if (IS_ERR(*prz)) {
                 int err = PTR_ERR(*prz);
 
@@ -443,6 +450,7 @@ static int ramoops_probe(struct platform_device *pdev)
 
         cxt->size = pdata->mem_size;
         cxt->phys_addr = pdata->mem_address;
+        cxt->memtype = pdata->mem_type;
         cxt->record_size = pdata->record_size;
         cxt->console_size = pdata->console_size;
         cxt->ftrace_size = pdata->ftrace_size;
@@ -572,6 +580,7 @@ static void ramoops_register_dummy(void)
 
         dummy_data->mem_size = mem_size;
         dummy_data->mem_address = mem_address;
+        dummy_data->mem_type = 0;
         dummy_data->record_size = record_size;
         dummy_data->console_size = ramoops_console_size;
         dummy_data->ftrace_size = ramoops_ftrace_size;