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| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2011-10-30 15:17:21 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-10-30 15:16:47 +0100 |
| commit | 07ea815b22b9f70ec8de6ddf8db63a1dd1585caf (patch) | |
| tree | e30015ef66661f3bb112136d42ea2dee86393d81 /arch/s390/kernel/crash_dump.c | |
| parent | [S390] qdio: prevent dsci access without adapter interrupts (diff) | |
| download | linux-07ea815b22b9f70ec8de6ddf8db63a1dd1585caf.tar.xz linux-07ea815b22b9f70ec8de6ddf8db63a1dd1585caf.zip | |
[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>
Diffstat (limited to 'arch/s390/kernel/crash_dump.c')
| -rw-r--r-- | arch/s390/kernel/crash_dump.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c index 2a9a3f405574..39f8fd4438fc 100644 --- a/arch/s390/kernel/crash_dump.c +++ b/arch/s390/kernel/crash_dump.c @@ -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; } /* |