memblock: implement for_each_reserved_mem_region() using __next_mem_region()

Iteration over memblock.reserved with for_each_reserved_mem_region() used
__next_reserved_mem_region() that implemented a subset of
__next_mem_region().

Use __for_each_mem_range() and, essentially, __next_mem_region() with
appropriate parameters to reduce code duplication.

While on it, rename for_each_reserved_mem_region() to
for_each_reserved_mem_range() for consistency.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>	[.clang-format]
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Emil Renner Berthing <kernel@esmil.dk>
Cc: Hari Bathini <hbathini@linux.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: https://lkml.kernel.org/r/20200818151634.14343-17-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 8 deletions

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 15ed119701c1..354078713cd1 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -132,9 +132,6 @@ void __next_mem_range_rev(u64 *idx, int nid, enum memblock_flags flags,
 			  struct memblock_type *type_b, phys_addr_t *out_start,
 			  phys_addr_t *out_end, int *out_nid);
 
-void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
-				phys_addr_t *out_end);
-
 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 
 #ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
@@ -224,7 +221,7 @@ static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
 				 MEMBLOCK_NONE, p_start, p_end, NULL)
 
 /**
- * for_each_reserved_mem_region - iterate over all reserved memblock areas
+ * for_each_reserved_mem_range - iterate over all reserved memblock areas
  * @i: u64 used as loop variable
  * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
@@ -232,10 +229,9 @@ static inline void __next_physmem_range(u64 *idx, struct memblock_type *type,
  * Walks over reserved areas of memblock. Available as soon as memblock
  * is initialized.
  */
-#define for_each_reserved_mem_region(i, p_start, p_end)			\
-	for (i = 0UL, __next_reserved_mem_region(&i, p_start, p_end);	\
-	     i != (u64)ULLONG_MAX;					\
-	     __next_reserved_mem_region(&i, p_start, p_end))
+#define for_each_reserved_mem_range(i, p_start, p_end)			\
+	__for_each_mem_range(i, &memblock.reserved, NULL, NUMA_NO_NODE,	\
+			     MEMBLOCK_NONE, p_start, p_end, NULL)
 
 static inline bool memblock_is_hotpluggable(struct memblock_region *m)
 {