Eric Lee / smarc-ti-linux-kernel

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Commit 5a74953ff56aa870d6913ef4d81934f5c620c59d

Authored by Michael Holzheu
Committed by Martin Schwidefsky
1 parent c9a7afa380
Exists in master and in 20 other branches dlt-processor-sdk-linux-03.00.00.04, newt-ti-linux-3.12.y, processor-sdk-linux-01.00.00, processor-sdk-linux-02.00.01, smarc-ti-linux-3.12.10, smarc-ti-linux-3.12.y, smarc-ti-linux-3.14.y, smarc-ti-linux-3.15.y, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04, ti-linux-3.12.y, ti-linux-3.14.y, ti-linux-3.15.y, ti-lsk-linux-4.1.y

s390/kdump: Disable mmap for s390 

The kdump mmap patch series (git commit 83086978c63afd7c73e1c) directly
map the PT_LOADs to memory. On s390 this does not work because the
copy_from_oldmem() function swaps [0,crashkernel size] with
[crashkernel base, crashkernel base+crashkernel size]. The swap
int copy_from_oldmem() was done in order correctly implement /dev/oldmem.

See: http://marc.info/?l=kexec&m=136940802511603&w=2

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff

... ... @@ -223,7 +223,7 @@
223 223 * regions in the 1st kernel pointed to by PT_LOAD entries) into
224 224 * virtually contiguous user-space in ELF layout.
225 225 */
226   -#ifdef CONFIG_MMU
  226 +#if defined(CONFIG_MMU) && !defined(CONFIG_S390)
227 227 static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
228 228 {
229 229 size_t size = vma->vm_end - vma->vm_start;