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Date: Thu, 28 Jul 2016 15:25:37 -0500
From: Rob Herring <robh@...nel.org>
To: Kees Cook <keescook@...omium.org>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
Greg Hackmann <ghackmann@...gle.com>,
Arnd Bergmann <arnd@...db.de>
Subject: [PATCH] Revert "pstore/ram: add Device Tree bindings"
This reverts commit 35da60941e44dbf57868e67686dd24cc1a33125a.
---
WTF!
I don't recall acking this nor have my comments (Arnd's really) been
addressed[1]. This should not have been merged yet.
Rob
[1] https://lkml.org/lkml/2016/6/21/969
Documentation/devicetree/bindings/misc/ramoops.txt | 48 -----------
Documentation/ramoops.txt | 6 +-
fs/pstore/ram.c | 95 +---------------------
3 files changed, 4 insertions(+), 145 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/misc/ramoops.txt
diff --git a/Documentation/devicetree/bindings/misc/ramoops.txt b/Documentation/devicetree/bindings/misc/ramoops.txt
deleted file mode 100644
index cd02cec..0000000
--- a/Documentation/devicetree/bindings/misc/ramoops.txt
+++ /dev/null
@@ -1,48 +0,0 @@
-Ramoops oops/panic logger
-=========================
-
-ramoops provides persistent RAM storage for oops and panics, so they can be
-recovered after a reboot. It is a backend to pstore, so this node is named
-"ramoops" after the backend, rather than "pstore" which is the subsystem.
-
-Parts of this storage may be set aside for other persistent log buffers, such
-as kernel log messages, or for optional ECC error-correction data. The total
-size of these optional buffers must fit in the reserved region.
-
-Any remaining space will be used for a circular buffer of oops and panic
-records. These records have a configurable size, with a size of 0 indicating
-that they should be disabled.
-
-At least one of "record-size", "console-size", "ftrace-size", or "pmsg-size"
-must be set non-zero, but are otherwise optional as listed below.
-
-
-Required properties:
-
-- compatible: must be "ramoops"
-
-- memory-region: phandle to a region of memory that is preserved between
- reboots
-
-
-Optional properties:
-
-- ecc-size: enables ECC support and specifies ECC buffer size in bytes
- (defaults to 0: no ECC)
-
-- record-size: maximum size in bytes of each dump done on oops/panic
- (defaults to 0: disabled)
-
-- console-size: size in bytes of log buffer reserved for kernel messages
- (defaults to 0: disabled)
-
-- ftrace-size: size in bytes of log buffer reserved for function tracing and
- profiling (defaults to 0: disabled)
-
-- pmsg-size: size in bytes of log buffer reserved for userspace messages
- (defaults to 0: disabled)
-
-- unbuffered: if present, use unbuffered mappings to map the reserved region
- (defaults to buffered mappings)
-
-- no-dump-oops: if present, only dump panics (defaults to panics and oops)
diff --git a/Documentation/ramoops.txt b/Documentation/ramoops.txt
index 9264bca..5d86756 100644
--- a/Documentation/ramoops.txt
+++ b/Documentation/ramoops.txt
@@ -45,7 +45,7 @@ corrupt, but usually it is restorable.
2. Setting the parameters
-Setting the ramoops parameters can be done in 3 different manners:
+Setting the ramoops parameters can be done in 2 different manners:
1. Use the module parameters (which have the names of the variables described
as before).
For quick debugging, you can also reserve parts of memory during boot
@@ -54,9 +54,7 @@ Setting the ramoops parameters can be done in 3 different manners:
kernel to use only the first 128 MB of memory, and place ECC-protected ramoops
region at 128 MB boundary:
"mem=128M ramoops.mem_address=0x8000000 ramoops.ecc=1"
- 2. Use Device Tree bindings, as described in
- Documentation/device-tree/bindings/misc/ramoops.txt.
- 3. Use a platform device and set the platform data. The parameters can then
+ 2. Use a platform device and set the platform data. The parameters can then
be set through that platform data. An example of doing that is:
#include <linux/pstore_ram.h>
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 47516a7..d9668c2 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -34,8 +34,6 @@
#include <linux/slab.h>
#include <linux/compiler.h>
#include <linux/pstore_ram.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
#define RAMOOPS_KERNMSG_HDR "===="
#define MIN_MEM_SIZE 4096UL
@@ -460,98 +458,15 @@ static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
return 0;
}
-static int ramoops_parse_dt_size(struct platform_device *pdev,
- const char *propname, u32 *value)
-{
- u32 val32 = 0;
- int ret;
-
- ret = of_property_read_u32(pdev->dev.of_node, propname, &val32);
- if (ret < 0 && ret != -EINVAL) {
- dev_err(&pdev->dev, "failed to parse property %s: %d\n",
- propname, ret);
- return ret;
- }
-
- if (val32 > INT_MAX) {
- dev_err(&pdev->dev, "%s %u > INT_MAX\n", propname, val32);
- return -EOVERFLOW;
- }
-
- *value = val32;
- return 0;
-}
-
-static int ramoops_parse_dt(struct platform_device *pdev,
- struct ramoops_platform_data *pdata)
-{
- struct device_node *of_node = pdev->dev.of_node;
- struct device_node *mem_region;
- struct resource res;
- u32 value;
- int ret;
-
- dev_dbg(&pdev->dev, "using Device Tree\n");
-
- mem_region = of_parse_phandle(of_node, "memory-region", 0);
- if (!mem_region) {
- dev_err(&pdev->dev, "no memory-region phandle\n");
- return -ENODEV;
- }
-
- ret = of_address_to_resource(mem_region, 0, &res);
- of_node_put(mem_region);
- if (ret) {
- dev_err(&pdev->dev,
- "failed to translate memory-region to resource: %d\n",
- ret);
- return ret;
- }
-
- pdata->mem_size = resource_size(&res);
- pdata->mem_address = res.start;
- pdata->mem_type = of_property_read_bool(of_node, "unbuffered");
- pdata->dump_oops = !of_property_read_bool(of_node, "no-dump-oops");
-
-#define parse_size(name, field) { \
- ret = ramoops_parse_dt_size(pdev, name, &value); \
- if (ret < 0) \
- return ret; \
- field = value; \
- }
-
- parse_size("record-size", pdata->record_size);
- parse_size("console-size", pdata->console_size);
- parse_size("ftrace-size", pdata->ftrace_size);
- parse_size("pmsg-size", pdata->pmsg_size);
- parse_size("ecc-size", pdata->ecc_info.ecc_size);
-
-#undef parse_size
-
- return 0;
-}
-
static int ramoops_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct ramoops_platform_data *pdata = dev->platform_data;
+ struct ramoops_platform_data *pdata = pdev->dev.platform_data;
struct ramoops_context *cxt = &oops_cxt;
size_t dump_mem_sz;
phys_addr_t paddr;
int err = -EINVAL;
- if (dev_of_node(dev) && !pdata) {
- pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata) {
- err = -ENOMEM;
- goto fail_out;
- }
-
- err = ramoops_parse_dt(pdev, pdata);
- if (err < 0)
- goto fail_out;
- }
-
/* Only a single ramoops area allowed at a time, so fail extra
* probes.
*/
@@ -681,17 +596,11 @@ static int ramoops_remove(struct platform_device *pdev)
return 0;
}
-static const struct of_device_id dt_match[] = {
- { .compatible = "ramoops" },
- {}
-};
-
static struct platform_driver ramoops_driver = {
.probe = ramoops_probe,
.remove = ramoops_remove,
.driver = {
- .name = "ramoops",
- .of_match_table = dt_match,
+ .name = "ramoops",
},
};
--
2.9.2
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