mm: remove CONFIG_HAVE_MEMBLOCK

All architecures use memblock for early memory management. There is no need
for the CONFIG_HAVE_MEMBLOCK configuration option.

[rppt@linux.vnet.ibm.com: of/fdt: fixup #ifdefs]
  Link: http://lkml.kernel.org/r/20180919103457.GA20545@rapoport-lnx
[rppt@linux.vnet.ibm.com: csky: fixups after bootmem removal]
  Link: http://lkml.kernel.org/r/20180926112744.GC4628@rapoport-lnx
[rppt@linux.vnet.ibm.com: remove stale #else and the code it protects]
  Link: http://lkml.kernel.org/r/1538067825-24835-1-git-send-email-rppt@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1536927045-23536-4-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Tested-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Serge Semin <fancer.lancer@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 1 insertions, 120 deletions

diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index 1f005b5c1555..ee61ac355104 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -132,9 +132,6 @@ extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
 #define alloc_bootmem_low_pages_node(pgdat, x) \
 	__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
 
-
-#if defined(CONFIG_HAVE_MEMBLOCK)
-
 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
 #define BOOTMEM_ALLOC_ACCESSIBLE	0
 #define BOOTMEM_ALLOC_ANYWHERE		(~(phys_addr_t)0)
@@ -234,115 +231,6 @@ static inline void __init memblock_free_late(
 	__memblock_free_late(base, size);
 }
 
-#else
-
-#define BOOTMEM_ALLOC_ACCESSIBLE	0
-
-
-/* Fall back to all the existing bootmem APIs */
-static inline void * __init memblock_virt_alloc(
-					phys_addr_t size,  phys_addr_t align)
-{
-	if (!align)
-		align = SMP_CACHE_BYTES;
-	return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
-}
-
-static inline void * __init memblock_virt_alloc_raw(
-					phys_addr_t size,  phys_addr_t align)
-{
-	if (!align)
-		align = SMP_CACHE_BYTES;
-	return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
-}
-
-static inline void * __init memblock_virt_alloc_nopanic(
-					phys_addr_t size, phys_addr_t align)
-{
-	if (!align)
-		align = SMP_CACHE_BYTES;
-	return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
-}
-
-static inline void * __init memblock_virt_alloc_low(
-					phys_addr_t size, phys_addr_t align)
-{
-	if (!align)
-		align = SMP_CACHE_BYTES;
-	return __alloc_bootmem_low(size, align, 0);
-}
-
-static inline void * __init memblock_virt_alloc_low_nopanic(
-					phys_addr_t size, phys_addr_t align)
-{
-	if (!align)
-		align = SMP_CACHE_BYTES;
-	return __alloc_bootmem_low_nopanic(size, align, 0);
-}
-
-static inline void * __init memblock_virt_alloc_from_nopanic(
-		phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
-{
-	return __alloc_bootmem_nopanic(size, align, min_addr);
-}
-
-static inline void * __init memblock_virt_alloc_node(
-						phys_addr_t size, int nid)
-{
-	return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
-				     BOOTMEM_LOW_LIMIT);
-}
-
-static inline void * __init memblock_virt_alloc_node_nopanic(
-						phys_addr_t size, int nid)
-{
-	return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
-					     SMP_CACHE_BYTES,
-					     BOOTMEM_LOW_LIMIT);
-}
-
-static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
-	phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
-{
-	return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
-					  min_addr);
-}
-
-static inline void * __init memblock_virt_alloc_try_nid_raw(
-			phys_addr_t size, phys_addr_t align,
-			phys_addr_t min_addr, phys_addr_t max_addr, int nid)
-{
-	return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
-				min_addr, max_addr);
-}
-
-static inline void * __init memblock_virt_alloc_try_nid_nopanic(
-			phys_addr_t size, phys_addr_t align,
-			phys_addr_t min_addr, phys_addr_t max_addr, int nid)
-{
-	return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
-				min_addr, max_addr);
-}
-
-static inline void __init memblock_free_early(
-					phys_addr_t base, phys_addr_t size)
-{
-	free_bootmem(base, size);
-}
-
-static inline void __init memblock_free_early_nid(
-				phys_addr_t base, phys_addr_t size, int nid)
-{
-	free_bootmem_node(NODE_DATA(nid), base, size);
-}
-
-static inline void __init memblock_free_late(
-					phys_addr_t base, phys_addr_t size)
-{
-	free_bootmem_late(base, size);
-}
-#endif /* defined(CONFIG_HAVE_MEMBLOCK) */
-
 extern void *alloc_large_system_hash(const char *tablename,
 				     unsigned long bucketsize,
 				     unsigned long numentries,
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 2acdd046df2d..224d27363cca 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -2,7 +2,6 @@
 #define _LINUX_MEMBLOCK_H
 #ifdef __KERNEL__
 
-#ifdef CONFIG_HAVE_MEMBLOCK
 /*
  * Logical memory blocks.
  *
@@ -440,12 +439,6 @@ static inline void early_memtest(phys_addr_t start, phys_addr_t end)
 {
 }
 #endif
-#else
-static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
-{
-	return 0;
-}
-#endif /* CONFIG_HAVE_MEMBLOCK */
 
 #endif /* __KERNEL__ */
 
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1e52b8fd1685..fcf9cc9d535f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2163,7 +2163,7 @@ extern int __meminit __early_pfn_to_nid(unsigned long pfn,
 					struct mminit_pfnnid_cache *state);
 #endif
 
-#if defined(CONFIG_HAVE_MEMBLOCK) && !defined(CONFIG_FLAT_NODE_MEM_MAP)
+#if !defined(CONFIG_FLAT_NODE_MEM_MAP)
 void zero_resv_unavail(void);
 #else
 static inline void zero_resv_unavail(void) {}