#include <linux/utime.h>
#include <linux/file.h>
#include <linux/memblock.h>
+#include <linux/mm.h>
#include <linux/namei.h>
#include <linux/init_syscalls.h>
message = x;
}
+static void panic_show_mem(const char *fmt, ...)
+{
+ va_list args;
+
+ show_mem(0, NULL);
+ va_start(args, fmt);
+ panic(fmt, args);
+ va_end(args);
+}
+
/* link hash */
#define N_ALIGN(len) ((((len) + 1) & ~3) + 2)
}
q = kmalloc(sizeof(struct hash), GFP_KERNEL);
if (!q)
- panic("can't allocate link hash entry");
+ panic_show_mem("can't allocate link hash entry");
q->major = major;
q->minor = minor;
q->ino = ino;
{
struct dir_entry *de = kmalloc(sizeof(struct dir_entry), GFP_KERNEL);
if (!de)
- panic("can't allocate dir_entry buffer");
+ panic_show_mem("can't allocate dir_entry buffer");
INIT_LIST_HEAD(&de->list);
de->name = kstrdup(name, GFP_KERNEL);
de->mtime = mtime;
name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL);
if (!header_buf || !symlink_buf || !name_buf)
- panic("can't allocate buffers");
+ panic_show_mem("can't allocate buffers");
state = Start;
this_header = 0;
#include <linux/initrd.h>
#include <linux/kexec.h>
+void __init reserve_initrd_mem(void)
+{
+ phys_addr_t start;
+ unsigned long size;
+
+ /* Ignore the virtul address computed during device tree parsing */
+ initrd_start = initrd_end = 0;
+
+ if (!phys_initrd_size)
+ return;
+ /*
+ * Round the memory region to page boundaries as per free_initrd_mem()
+ * This allows us to detect whether the pages overlapping the initrd
+ * are in use, but more importantly, reserves the entire set of pages
+ * as we don't want these pages allocated for other purposes.
+ */
+ start = round_down(phys_initrd_start, PAGE_SIZE);
+ size = phys_initrd_size + (phys_initrd_start - start);
+ size = round_up(size, PAGE_SIZE);
+
+ if (!memblock_is_region_memory(start, size)) {
+ pr_err("INITRD: 0x%08llx+0x%08lx is not a memory region",
+ (u64)start, size);
+ goto disable;
+ }
+
+ if (memblock_is_region_reserved(start, size)) {
+ pr_err("INITRD: 0x%08llx+0x%08lx overlaps in-use memory region\n",
+ (u64)start, size);
+ goto disable;
+ }
+
+ memblock_reserve(start, size);
+ /* Now convert initrd to virtual addresses */
+ initrd_start = (unsigned long)__va(phys_initrd_start);
+ initrd_end = initrd_start + phys_initrd_size;
+ initrd_below_start_ok = 1;
+
+ return;
+disable:
+ pr_cont(" - disabling initrd\n");
+ initrd_start = 0;
+ initrd_end = 0;
+}
+
void __weak __init free_initrd_mem(unsigned long start, unsigned long end)
{
#ifdef CONFIG_ARCH_KEEP_MEMBLOCK
/* Load the built in initramfs */
char *err = unpack_to_rootfs(__initramfs_start, __initramfs_size);
if (err)
- panic("%s", err); /* Failed to decompress INTERNAL initramfs */
+ panic_show_mem("%s", err); /* Failed to decompress INTERNAL initramfs */
if (!initrd_start || IS_ENABLED(CONFIG_INITRAMFS_FORCE))
goto done;