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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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34
arch/s390/kernel/crash_dump.c
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@@ -22,6 +22,32 @@
#define PTR_SUB(x, y) (((char *) (x)) - ((unsigned long) (y)))
#define PTR_DIFF(x, y) ((unsigned long)(((char *) (x)) - ((unsigned long) (y))))
struct dump_save_areas dump_save_areas;
/*
* Allocate and add a save area for a CPU
*/
struct save_area *dump_save_area_create(int cpu)
{
struct save_area **save_areas, *save_area;
save_area = kmalloc(sizeof(*save_area), GFP_KERNEL);
if (!save_area)
return NULL;
if (cpu + 1 > dump_save_areas.count) {
dump_save_areas.count = cpu + 1;
save_areas = krealloc(dump_save_areas.areas,
dump_save_areas.count * sizeof(void *),
GFP_KERNEL | __GFP_ZERO);
if (!save_areas) {
kfree(save_area);
return NULL;
}
dump_save_areas.areas = save_areas;
}
dump_save_areas.areas[cpu] = save_area;
return save_area;
}
/*
* Return physical address for virtual address
@@ -450,8 +476,8 @@ static int get_cpu_cnt(void)
{
int i, cpus = 0;
for (i = 0; zfcpdump_save_areas[i]; i++) {
if (zfcpdump_save_areas[i]->pref_reg == 0)
for (i = 0; i < dump_save_areas.count; i++) {
if (dump_save_areas.areas[i]->pref_reg == 0)
continue;
cpus++;
}
@@ -522,8 +548,8 @@ static void *notes_init(Elf64_Phdr *phdr, void *ptr, u64 notes_offset)
ptr = nt_prpsinfo(ptr);
for (i = 0; zfcpdump_save_areas[i]; i++) {
sa = zfcpdump_save_areas[i];
for (i = 0; i < dump_save_areas.count; i++) {
sa = dump_save_areas.areas[i];
if (sa->pref_reg == 0)
continue;
ptr = fill_cpu_elf_notes(ptr, sa);