[PATCH trivial] ppc64/mm: remove comment that is no longer valid

[Santosh Sivaraj <santosh@fossix.org>]

hash_low_64.S was removed in [1] and since flush_hash_page is not called
from any assembly routine.

[1]: commit a43c0eb8364c0 ("powerpc/mm: Convert 4k insert from asm to C")

Signed-off-by: Santosh Sivaraj <santosh@fossix.org>
---
 arch/powerpc/mm/book3s64/hash_utils.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index 468169e33c86f..90ee0be3281a9 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -1706,10 +1706,6 @@ unsigned long pte_get_hash_gslot(unsigned long vpn, unsigned long shift,
 	return gslot;
 }
 
-/*
- * WARNING: This is called from hash_low_64.S, if you change this prototype,
- *          do not forget to update the assembly call site !
- */
 void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize, int ssize,
 		     unsigned long flags)
 {
-- 
2.26.2