X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=target%2Flinux%2Fgeneric%2Fpatches-4.4%2F930-crashlog.patch;h=fdc80d750aa5a1491a2eb9121c64374004536ff0;hb=949cfbb24374be151e2c01db09dd98bc8537a989;hp=339cffa34e7094e231b966cdfd298bee9b0d436d;hpb=6b5a4185122b8c9edfb16e0ac70802733191ffe7;p=lede.git

diff --git a/target/linux/generic/patches-4.4/930-crashlog.patch b/target/linux/generic/patches-4.4/930-crashlog.patch
index 339cffa34e..fdc80d750a 100644
--- a/target/linux/generic/patches-4.4/930-crashlog.patch
+++ b/target/linux/generic/patches-4.4/930-crashlog.patch
@@ -43,7 +43,7 @@
  
 --- /dev/null
 +++ b/kernel/crashlog.c
-@@ -0,0 +1,193 @@
+@@ -0,0 +1,213 @@
 +/*
 + * Crash information logger
 + * Copyright (C) 2010 Felix Fietkau <nbd@nbd.name>
@@ -103,37 +103,57 @@
 +
 +extern struct list_head *crashlog_modules;
 +
++static bool crashlog_set_addr(phys_addr_t addr, phys_addr_t size)
++{
++	/* Limit to lower 64 MB to avoid highmem */
++	phys_addr_t limit = 64 * 1024 * 1024;
++
++	if (crashlog_addr)
++		return false;
++
++	if (addr > limit)
++		return false;
++
++	if (addr + size > limit)
++		size = limit - addr;
++
++	crashlog_addr = addr;
++
++	if (addr + size > CRASHLOG_OFFSET)
++		crashlog_addr += size - CRASHLOG_OFFSET;
++
++	return true;
++}
++
 +#ifndef CONFIG_NO_BOOTMEM
 +void __init crashlog_init_bootmem(bootmem_data_t *bdata)
 +{
-+	unsigned long addr;
++	phys_addr_t start, end;
 +
-+	if (crashlog_addr)
++	start = PFN_PHYS(bdata->node_low_pfn);
++	end = PFN_PHYS(bdata->node_min_pfn);
++	if (!crashlog_set_addr(start, end - start))
 +		return;
 +
-+	addr = PFN_PHYS(bdata->node_low_pfn) - CRASHLOG_OFFSET;
-+	if (reserve_bootmem(addr, CRASHLOG_SIZE, BOOTMEM_EXCLUSIVE) < 0) {
-+		printk("Crashlog failed to allocate RAM at address 0x%lx\n", addr);
-+		bdata->node_low_pfn -= CRASHLOG_PAGES;
-+		addr = PFN_PHYS(bdata->node_low_pfn);
++	if (reserve_bootmem(crashlog_addr, CRASHLOG_SIZE, BOOTMEM_EXCLUSIVE) < 0) {
++		printk("Crashlog failed to allocate RAM at address 0x%lx\n",
++		       crashlog_addr);
++		crashlog_addr = 0;
 +	}
-+	crashlog_addr = addr;
 +}
 +#endif
 +
 +#ifdef CONFIG_HAVE_MEMBLOCK
 +void __init_memblock crashlog_init_memblock(phys_addr_t addr, phys_addr_t size)
 +{
-+	if (crashlog_addr)
++	if (!crashlog_set_addr(addr, size))
 +		return;
 +
-+	addr += size - CRASHLOG_OFFSET;
-+	if (memblock_reserve(addr, CRASHLOG_SIZE)) {
-+		printk("Crashlog failed to allocate RAM at address 0x%lx\n", (unsigned long) addr);
-+		return;
++	if (memblock_reserve(crashlog_addr, CRASHLOG_SIZE)) {
++		printk("Crashlog failed to allocate RAM at address 0x%lx\n",
++		       crashlog_addr);
++		crashlog_addr = 0;
 +	}
-+
-+	crashlog_addr = addr;
 +}
 +#endif
 +
@@ -237,24 +257,6 @@
 +	return 0;
 +}
 +module_init(crashlog_init_fs);
---- a/mm/bootmem.c
-+++ b/mm/bootmem.c
-@@ -15,6 +15,7 @@
- #include <linux/export.h>
- #include <linux/kmemleak.h>
- #include <linux/range.h>
-+#include <linux/crashlog.h>
- #include <linux/memblock.h>
- #include <linux/bug.h>
- #include <linux/io.h>
-@@ -177,6 +178,7 @@ static unsigned long __init free_all_boo
- 	if (!bdata->node_bootmem_map)
- 		return 0;
- 
-+	crashlog_init_bootmem(bdata);
- 	map = bdata->node_bootmem_map;
- 	start = bdata->node_min_pfn;
- 	end = bdata->node_low_pfn;
 --- a/kernel/module.c
 +++ b/kernel/module.c
 @@ -275,6 +275,9 @@ static void mod_update_bounds(struct mod
@@ -277,7 +279,16 @@
  
  #include <asm-generic/sections.h>
  #include <linux/io.h>
-@@ -541,6 +542,8 @@ int __init_memblock memblock_add_range(s
+@@ -503,6 +504,8 @@ static void __init_memblock memblock_ins
+ 	memblock_set_region_node(rgn, nid);
+ 	type->cnt++;
+ 	type->total_size += size;
++	if (type == &memblock.memory)
++		crashlog_init_memblock(base, size);
+ }
+ 
+ /**
+@@ -541,6 +544,8 @@ int __init_memblock memblock_add_range(s
  		type->regions[0].flags = flags;
  		memblock_set_region_node(&type->regions[0], nid);
  		type->total_size = size;
@@ -286,3 +297,21 @@
  		return 0;
  	}
  repeat:
+--- a/mm/bootmem.c
++++ b/mm/bootmem.c
+@@ -15,6 +15,7 @@
+ #include <linux/export.h>
+ #include <linux/kmemleak.h>
+ #include <linux/range.h>
++#include <linux/crashlog.h>
+ #include <linux/memblock.h>
+ #include <linux/bug.h>
+ #include <linux/io.h>
+@@ -177,6 +178,7 @@ static unsigned long __init free_all_boo
+ 	if (!bdata->node_bootmem_map)
+ 		return 0;
+ 
++	crashlog_init_bootmem(bdata);
+ 	map = bdata->node_bootmem_map;
+ 	start = bdata->node_min_pfn;
+ 	end = bdata->node_low_pfn;