Not only setup_subarch will get data from debugfs file
boot_params/data, later code for adding efi_info will
also need do same thing. Thus add a common function here
for later use.
v1->v2: make get_bootparam() static
Signed-off-by: Dave Young <dyoung@xxxxxxxxxx>
---
kexec/arch/i386/x86-linux-setup.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
--- kexec-tools.orig/kexec/arch/i386/x86-linux-setup.c
+++ kexec-tools/kexec/arch/i386/x86-linux-setup.c
@@ -436,10 +436,9 @@ char *find_mnt_by_fsname(char *fsname)
return mntdir;
}
-void setup_subarch(struct x86_linux_param_header *real_mode)
+static void get_bootparam(void *buf, off_t offset, size_t size)
{
int data_file;
- const off_t offset = offsetof(typeof(*real_mode), hardware_subarch);
char *debugfs_mnt;
char filename[PATH_MAX];
@@ -447,7 +446,7 @@ void setup_subarch(struct x86_linux_para
if (!debugfs_mnt)
return;
snprintf(filename, PATH_MAX, "%s/%s", debugfs_mnt, "boot_params/data");
- filename[PATH_MAX-1] = 0;
+ filename[PATH_MAX - 1] = 0;
free(debugfs_mnt);
data_file = open(filename, O_RDONLY);
@@ -455,11 +454,18 @@ void setup_subarch(struct x86_linux_para
return;
if (lseek(data_file, offset, SEEK_SET) < 0)
goto close;
- read(data_file, &real_mode->hardware_subarch, sizeof(uint32_t));
+ read(data_file, buf, size);
close:
close(data_file);
}
+void setup_subarch(struct x86_linux_param_header *real_mode)
+{
+ off_t offset = offsetof(typeof(*real_mode), hardware_subarch);
+
+ get_bootparam(&real_mode->hardware_subarch, offset, sizeof(uint32_t));
+}
+
void setup_linux_system_parameters(struct kexec_info *info,
struct x86_linux_param_header *real_mode)
{
--
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