sparc64: Suppress kmalloc (DAX driver) warning due to allocation failure

dax_alloc is used by libdax to allocate 4MB chunks of physically
contiguous memory using kmalloc. It is normal for dax_alloc to fail
when kmalloc runs out of memory and this should not be treated as a warning.
This failure should be caught in libdax and attempted to allocate memory
from another source (Eg: mmap hugepage).

Orabug: 26224254

Signed-off-by: Sanath Kumar <sanath.s.kumar@oracle.com>
Reviewed-by: Rob Gardner <rob.gardner@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Allen Pais <allen.pais@oracle.com>

diff --git a/arch/sparc/dax/dax_mm.c b/arch/sparc/dax/dax_mm.c
index 4ae67473820078b5e0f5e5f490b491551183d5c4..97a8fa0e5596e6549ed7899ddbdd56ddf9e6a441 100644 (file)
--- a/arch/sparc/dax/dax_mm.c
+++ b/arch/sparc/dax/dax_mm.c
@@ -67,7 +67,7 @@ static int dax_alloc_ram(struct file *filp, struct vm_area_struct *vma)
                goto done;
        }
 
-       kva = kzalloc(len, GFP_KERNEL);
+       kva = kzalloc(len, GFP_KERNEL | __GFP_NOWARN);
        if (kva == NULL)
                goto done;