[PATCH] powerpc: Use printk instead of WARN in change_memory_attr

[Ritesh Harjani (IBM)]

Use pr_warn_once instead of WARN_ON_ONCE as discussed here [1]
for printing possible use of set_memory_* on linear map on Hash.

[1]: https://lore.kernel.org/all/877cc2fpi2.fsf@mail.lhotse/#t

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list at gmail.com>
---
 arch/powerpc/mm/pageattr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/pageattr.c b/arch/powerpc/mm/pageattr.c
index ac22bf28086f..c8c2d664c6f3 100644
--- a/arch/powerpc/mm/pageattr.c
+++ b/arch/powerpc/mm/pageattr.c
@@ -94,8 +94,11 @@ int change_memory_attr(unsigned long addr, int numpages, long action)
 	if (!radix_enabled()) {
 		int region = get_region_id(addr);

-		if (WARN_ON_ONCE(region != VMALLOC_REGION_ID && region != IO_REGION_ID))
+		if (region != VMALLOC_REGION_ID && region != IO_REGION_ID) {
+			pr_warn_once("%s: possible use of set_memory_* on linear map on Hash from (%ps)\n",
+					__func__, __builtin_return_address(0));
 			return -EINVAL;
+		}
 	}
 #endif

--
2.39.2