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[S390] Remove error checking from copy_oldmem_page() 

Currently it can happen that the pre-allocated ELF header contains a wrong
memory map which would result in errors when copying /proc/vmcore.
In order to still get a valid vmcore, we (temporarily) disable the error
checking in copy_oldmem_page(). This will then produce zero pages for those
memory regions.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
hifive-unleashed-5.1
Michael Holzheu 2011-10-30 15:17:21 +01:00 committed by Martin Schwidefsky
parent 5f4026f8b2
commit 07ea815b22
1 changed files with 4 additions and 5 deletions
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9
arch/s390/kernel/crash_dump.c
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@ -31,7 +31,6 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
size_t csize, unsigned long offset, int userbuf)
{
unsigned long src;
int rc;
if (!csize)
return 0;
@ -43,11 +42,11 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf,
src < OLDMEM_BASE + OLDMEM_SIZE)
src -= OLDMEM_BASE;
if (userbuf)
rc = copy_to_user_real((void __user *) buf, (void *) src,
csize);
copy_to_user_real((void __force __user *) buf, (void *) src,
csize);
else
rc = memcpy_real(buf, (void *) src, csize);
return rc < 0 ? rc : csize;
memcpy_real(buf, (void *) src, csize);
return csize;
}
/*