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From: Mike Rapoport <rppt@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Emil Renner Berthing <kernel@esmil.dk>,
	linux-sh@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>,
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	linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
	linux-c6x-dev@linux-c6x.org, Baoquan He <bhe@redhat.com>,
	x86@kernel.org, Russell King <linux@armlinux.org.uk>,
	Mike Rapoport <rppt@linux.ibm.com>,
	clang-built-linux@googlegroups.com,
	Ingo Molnar <mingo@redhat.com>,
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	Catalin Marinas <catalin.marinas@arm.com>,
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	linux-xtensa@linux-xtensa.org, openrisc@lists.librecores.org,
	Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Stafford Horne <shorne@gmail.com>,
	Hari Bathini <hbathini@linux.ibm.com>,
	Michal Simek <monstr@monstr.eu>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
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	iommu@lists.linux-foundation.org,
	Palmer Dabbelt <palmer@dabbelt.com>,
	linuxppc-dev@lists.ozlabs.org, Mike Rapoport <rppt@kernel.org>
Subject: [PATCH v2 10/17] memblock: reduce number of parameters in for_each_mem_range()
Date: Sun,  2 Aug 2020 19:35:54 +0300
Message-ID: <20200802163601.8189-11-rppt@kernel.org> (raw)
In-Reply-To: <20200802163601.8189-1-rppt@kernel.org>

From: Mike Rapoport <rppt@linux.ibm.com>

Currently for_each_mem_range() iterator is the most generic way to traverse
memblock regions. As such, it has 8 parameters and it is hardly convenient
to users. Most users choose to utilize one of its wrappers and the only
user that actually needs most of the parameters outside memblock is s390
crash dump implementation.

To avoid yet another naming for memblock iterators, rename the existing
for_each_mem_range() to __for_each_mem_range() and add a new
for_each_mem_range() wrapper with only index, start and end parameters.

The new wrapper nicely fits into init_unavailable_mem() and will be used in
upcoming changes to simplify memblock traversals.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
---
 .clang-format                          |  1 +
 arch/arm64/kernel/machine_kexec_file.c |  6 ++----
 arch/s390/kernel/crash_dump.c          |  8 ++++----
 include/linux/memblock.h               | 18 ++++++++++++++----
 mm/page_alloc.c                        |  3 +--
 5 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/.clang-format b/.clang-format
index a0a96088c74f..52ededab25ce 100644
--- a/.clang-format
+++ b/.clang-format
@@ -205,6 +205,7 @@ ForEachMacros:
   - 'for_each_memblock_type'
   - 'for_each_memcg_cache_index'
   - 'for_each_mem_pfn_range'
+  - '__for_each_mem_range'
   - 'for_each_mem_range'
   - 'for_each_mem_range_rev'
   - 'for_each_migratetype_order'
diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c
index 361a1143e09e..5b0e67b93cdc 100644
--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -215,8 +215,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)
 	phys_addr_t start, end;
 
 	nr_ranges = 1; /* for exclusion of crashkernel region */
-	for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE,
-					MEMBLOCK_NONE, &start, &end, NULL)
+	for_each_mem_range(i, &start, &end)
 		nr_ranges++;
 
 	cmem = kmalloc(struct_size(cmem, ranges, nr_ranges), GFP_KERNEL);
@@ -225,8 +224,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)
 
 	cmem->max_nr_ranges = nr_ranges;
 	cmem->nr_ranges = 0;
-	for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE,
-					MEMBLOCK_NONE, &start, &end, NULL) {
+	for_each_mem_range(i, &start, &end) {
 		cmem->ranges[cmem->nr_ranges].start = start;
 		cmem->ranges[cmem->nr_ranges].end = end - 1;
 		cmem->nr_ranges++;
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index f96a5857bbfd..e28085c725ff 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -549,8 +549,8 @@ static int get_mem_chunk_cnt(void)
 	int cnt = 0;
 	u64 idx;
 
-	for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE,
-			   MEMBLOCK_NONE, NULL, NULL, NULL)
+	__for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE,
+			     MEMBLOCK_NONE, NULL, NULL, NULL)
 		cnt++;
 	return cnt;
 }
@@ -563,8 +563,8 @@ static void loads_init(Elf64_Phdr *phdr, u64 loads_offset)
 	phys_addr_t start, end;
 	u64 idx;
 
-	for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE,
-			   MEMBLOCK_NONE, &start, &end, NULL) {
+	__for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE,
+			     MEMBLOCK_NONE, &start, &end, NULL) {
 		phdr->p_filesz = end - start;
 		phdr->p_type = PT_LOAD;
 		phdr->p_offset = start;
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index e6a23b3db696..d70c2835e913 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -142,7 +142,7 @@ void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 
 /**
- * for_each_mem_range - iterate through memblock areas from type_a and not
+ * __for_each_mem_range - iterate through memblock areas from type_a and not
  * included in type_b. Or just type_a if type_b is NULL.
  * @i: u64 used as loop variable
  * @type_a: ptr to memblock_type to iterate
@@ -153,7 +153,7 @@ void __memblock_free_late(phys_addr_t base, phys_addr_t size);
  * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
  * @p_nid: ptr to int for nid of the range, can be %NULL
  */
-#define for_each_mem_range(i, type_a, type_b, nid, flags,		\
+#define __for_each_mem_range(i, type_a, type_b, nid, flags,		\
 			   p_start, p_end, p_nid)			\
 	for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b,	\
 				     p_start, p_end, p_nid);		\
@@ -182,6 +182,16 @@ void __memblock_free_late(phys_addr_t base, phys_addr_t size);
 	     __next_mem_range_rev(&i, nid, flags, type_a, type_b,	\
 				  p_start, p_end, p_nid))
 
+/**
+ * for_each_mem_range - iterate through memory 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
+ */
+#define for_each_mem_range(i, p_start, p_end) \
+	__for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE,	\
+			     MEMBLOCK_NONE, p_start, p_end, NULL)
+
 /**
  * for_each_reserved_mem_region - iterate over all reserved memblock areas
  * @i: u64 used as loop variable
@@ -287,8 +297,8 @@ int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask);
  * soon as memblock is initialized.
  */
 #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid)	\
-	for_each_mem_range(i, &memblock.memory, &memblock.reserved,	\
-			   nid, flags, p_start, p_end, p_nid)
+	__for_each_mem_range(i, &memblock.memory, &memblock.reserved,	\
+			     nid, flags, p_start, p_end, p_nid)
 
 /**
  * for_each_free_mem_range_reverse - rev-iterate through free memblock areas
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e028b87ce294..95af111d69d3 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -6972,8 +6972,7 @@ static void __init init_unavailable_mem(void)
 	 * Loop through unavailable ranges not covered by memblock.memory.
 	 */
 	pgcnt = 0;
-	for_each_mem_range(i, &memblock.memory, NULL,
-			NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) {
+	for_each_mem_range(i, &start, &end) {
 		if (next < start)
 			pgcnt += init_unavailable_range(PFN_DOWN(next),
 							PFN_UP(start));
-- 
2.26.2


  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-02 16:35 [PATCH v2 00/17] memblock: seasonal cleaning^w cleanup Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 01/17] KVM: PPC: Book3S HV: simplify kvm_cma_reserve() Mike Rapoport
2020-08-04 13:53   ` Daniel Axtens
2020-08-02 16:35 ` [PATCH v2 02/17] dma-contiguous: simplify cma_early_percent_memory() Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 03/17] arm, xtensa: simplify initialization of high memory pages Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 04/17] arm64: numa: simplify dummy_numa_init() Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 05/17] h8300, nds32, openrisc: simplify detection of memory extents Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 06/17] riscv: drop unneeded node initialization Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 07/17] mircoblaze: drop unneeded NUMA and sparsemem initializations Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 08/17] memblock: make for_each_memblock_type() iterator private Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 09/17] memblock: make memblock_debug and related functionality private Mike Rapoport
2020-08-02 16:35 ` Mike Rapoport [this message]
2020-08-02 16:35 ` [PATCH v2 11/17] arch, mm: replace for_each_memblock() with for_each_mem_pfn_range() Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 12/17] arch, drivers: replace for_each_membock() with for_each_mem_range() Mike Rapoport
2020-08-02 16:35 ` [PATCH v2 13/17] x86/setup: simplify initrd relocation and reservation Mike Rapoport
2020-08-02 18:01   ` Ingo Molnar
2020-08-02 16:35 ` [PATCH v2 14/17] x86/setup: simplify reserve_crashkernel() Mike Rapoport
2020-08-02 18:02   ` Ingo Molnar
2020-08-02 16:35 ` [PATCH v2 15/17] memblock: remove unused memblock_mem_size() Mike Rapoport
2020-08-02 16:36 ` [PATCH v2 16/17] memblock: implement for_each_reserved_mem_region() using __next_mem_region() Mike Rapoport
2020-08-02 16:36 ` [PATCH v2 17/17] memblock: use separate iterators for memory and reserved regions Mike Rapoport
2020-08-02 18:03   ` Ingo Molnar

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