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s390: Remove zfcpdump NR_CPUS dependency

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Currently zfpcdump can only collect registers for up to CONFIG_NR_CPUS
CPUss. This dependency is not necessary. So remove it by dynamically
allocating the save area array.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu
2013-10-11 10:29:23 +02:00
committed by Martin Schwidefsky
parent 05e0baaf9b
commit 5895294274
5 changed files with 49 additions and 26 deletions
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drivers/s390/char/zcore.c
+9 -11
View File
@@ -151,7 +151,7 @@ static int __init init_cpu_info(enum arch_id arch)
/* get info for boot cpu from lowcore, stored in the HSA */
sa = kmalloc(sizeof(*sa), GFP_KERNEL);
sa = dump_save_area_create(0);
if (!sa)
return -ENOMEM;
if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) {
@@ -159,7 +159,6 @@ static int __init init_cpu_info(enum arch_id arch)
kfree(sa);
return -EIO;
}
zfcpdump_save_areas[0] = sa;
return 0;
}
@@ -246,24 +245,25 @@ static int copy_lc(void __user *buf, void *sa, int sa_off, int len)
static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
{
unsigned long end;
int i = 0;
int i;
if (count == 0)
return 0;
end = start + count;
while (zfcpdump_save_areas[i]) {
for (i = 0; i < dump_save_areas.count; i++) {
unsigned long cp_start, cp_end; /* copy range */
unsigned long sa_start, sa_end; /* save area range */
unsigned long prefix;
unsigned long sa_off, len, buf_off;
struct save_area *save_area = dump_save_areas.areas[i];
prefix = zfcpdump_save_areas[i]->pref_reg;
prefix = save_area->pref_reg;
sa_start = prefix + sys_info.sa_base;
sa_end = prefix + sys_info.sa_base + sys_info.sa_size;
if ((end < sa_start) || (start > sa_end))
goto next;
continue;
cp_start = max(start, sa_start);
cp_end = min(end, sa_end);
@@ -272,10 +272,8 @@ static int zcore_add_lc(char __user *buf, unsigned long start, size_t count)
len = cp_end - cp_start;
TRACE("copy_lc for: %lx\n", start);
if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len))
if (copy_lc(buf + buf_off, save_area, sa_off, len))
return -EFAULT;
next:
i++;
}
return 0;
}
@@ -637,8 +635,8 @@ static void __init zcore_header_init(int arch, struct zcore_header *hdr,
hdr->num_pages = mem_size / PAGE_SIZE;
hdr->tod = get_tod_clock();
get_cpu_id(&hdr->cpu_id);
for (i = 0; zfcpdump_save_areas[i]; i++) {
prefix = zfcpdump_save_areas[i]->pref_reg;
for (i = 0; i < dump_save_areas.count; i++) {
prefix = dump_save_areas.areas[i]->pref_reg;
hdr->real_cpu_cnt++;
if (!prefix)
continue;