From: Stefan Agner <stefan@xxxxxxxx>
Subject: mm/memblock.c: cast constant ULLONG_MAX to phys_addr_t
This fixes a warning shown when phys_addr_t is 32-bit int when compiling
with clang:
mm/memblock.c:927:15: warning: implicit conversion from 'unsigned long long'
to 'phys_addr_t' (aka 'unsigned int') changes value from
18446744073709551615 to 4294967295 [-Wconstant-conversion]
r->base : ULLONG_MAX;
^~~~~~~~~~
./include/linux/kernel.h:30:21: note: expanded from macro 'ULLONG_MAX'
#define ULLONG_MAX (~0ULL)
^~~~~
Link: http://lkml.kernel.org/r/20180319005645.29051-1-stefan@xxxxxxxx
Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Cc: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memblock.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/memblock.c~mm-memblock-cast-constant-ullong_max-to-phys_addr_t mm/memblock.c
--- a/mm/memblock.c~mm-memblock-cast-constant-ullong_max-to-phys_addr_t
+++ a/mm/memblock.c
@@ -925,7 +925,7 @@ void __init_memblock __next_mem_range(u6
r = &type_b->regions[idx_b];
r_start = idx_b ? r[-1].base + r[-1].size : 0;
r_end = idx_b < type_b->cnt ?
- r->base : ULLONG_MAX;
+ r->base : (phys_addr_t)ULLONG_MAX;
/*
* if idx_b advanced past idx_a,
@@ -1041,7 +1041,7 @@ void __init_memblock __next_mem_range_re
r = &type_b->regions[idx_b];
r_start = idx_b ? r[-1].base + r[-1].size : 0;
r_end = idx_b < type_b->cnt ?
- r->base : ULLONG_MAX;
+ r->base : (phys_addr_t)ULLONG_MAX;
/*
* if idx_b advanced past idx_a,
* break out to advance idx_a
_
--
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