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Date: Tue, 12 Jul 2011 09:58:09 +0200
From: Tejun Heo <tj@...nel.org>
To: mingo@...hat.com, hpa@...or.com, tglx@...utronix.de,
benh@...nel.crashing.org, yinghai@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
x86@...nel.org, Tejun Heo <tj@...nel.org>
Subject: [PATCH 5/6] memblock: Kill MEMBLOCK_ERROR
25818f0f28 (memblock: Make MEMBLOCK_ERROR be 0) thankfully made
MEMBLOCK_ERROR 0 and there already are codes which expect error return
to be 0. There's no point in keeping MEMBLOCK_ERROR around. End its
misery.
Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---
arch/x86/kernel/aperture_64.c | 2 +-
arch/x86/kernel/check.c | 2 +-
arch/x86/kernel/e820.c | 2 +-
arch/x86/kernel/setup.c | 4 ++--
arch/x86/kernel/trampoline.c | 2 +-
arch/x86/mm/init.c | 2 +-
arch/x86/mm/memblock.c | 6 +++---
arch/x86/mm/numa.c | 6 +++---
arch/x86/mm/numa_32.c | 4 ++--
arch/x86/mm/numa_emulation.c | 2 +-
include/linux/memblock.h | 4 +---
kernel/printk.c | 2 +-
mm/memblock.c | 21 ++++++++++-----------
mm/nobootmem.c | 2 +-
mm/page_alloc.c | 4 ++--
15 files changed, 31 insertions(+), 34 deletions(-)
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 3d2661c..5636308 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -88,7 +88,7 @@ static u32 __init allocate_aperture(void)
*/
addr = memblock_find_in_range(GART_MIN_ADDR, GART_MAX_ADDR,
aper_size, aper_size);
- if (addr == MEMBLOCK_ERROR || addr + aper_size > GART_MAX_ADDR) {
+ if (!addr || addr + aper_size > GART_MAX_ADDR) {
printk(KERN_ERR
"Cannot allocate aperture memory hole (%lx,%uK)\n",
addr, aper_size>>10);
diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c
index 452932d..95680fc 100644
--- a/arch/x86/kernel/check.c
+++ b/arch/x86/kernel/check.c
@@ -86,7 +86,7 @@ void __init setup_bios_corruption_check(void)
u64 size;
addr = memblock_x86_find_in_range_size(addr, &size, PAGE_SIZE);
- if (addr == MEMBLOCK_ERROR)
+ if (!addr)
break;
if (addr >= corruption_check_size)
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 3e2ef84..0f9ff58 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -745,7 +745,7 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
for (start = startt; ; start += size) {
start = memblock_x86_find_in_range_size(start, &size, align);
- if (start == MEMBLOCK_ERROR)
+ if (!start)
return 0;
if (size >= sizet)
break;
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index afaf384..31ffe20 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -331,7 +331,7 @@ static void __init relocate_initrd(void)
ramdisk_here = memblock_find_in_range(0, end_of_lowmem, area_size,
PAGE_SIZE);
- if (ramdisk_here == MEMBLOCK_ERROR)
+ if (!ramdisk_here)
panic("Cannot find place for new RAMDISK of size %lld\n",
ramdisk_size);
@@ -554,7 +554,7 @@ static void __init reserve_crashkernel(void)
crash_base = memblock_find_in_range(alignment,
CRASH_KERNEL_ADDR_MAX, crash_size, alignment);
- if (crash_base == MEMBLOCK_ERROR) {
+ if (!crash_base) {
pr_info("crashkernel reservation failed - No suitable area found.\n");
return;
}
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c
index a91ae77..a1f13dd 100644
--- a/arch/x86/kernel/trampoline.c
+++ b/arch/x86/kernel/trampoline.c
@@ -14,7 +14,7 @@ void __init setup_trampolines(void)
/* Has to be in very low memory so we can execute real-mode AP code. */
mem = memblock_find_in_range(0, 1<<20, size, PAGE_SIZE);
- if (mem == MEMBLOCK_ERROR)
+ if (!mem)
panic("Cannot allocate trampoline\n");
x86_trampoline_base = __va(mem);
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 3032644..13cf05a 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -68,7 +68,7 @@ static void __init find_early_table_space(unsigned long end, int use_pse,
#endif
base = memblock_find_in_range(start, good_end, tables, PAGE_SIZE);
- if (base == MEMBLOCK_ERROR)
+ if (!base)
panic("Cannot find space for the kernel page tables");
pgt_buf_start = base >> PAGE_SHIFT;
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index 992da5e..e126117 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -66,7 +66,7 @@ u64 __init memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align)
return addr;
}
- return MEMBLOCK_ERROR;
+ return 0;
}
static __init struct range *find_range_array(int count)
@@ -78,7 +78,7 @@ static __init struct range *find_range_array(int count)
end = memblock.current_limit;
mem = memblock_find_in_range(0, end, size, sizeof(struct range));
- if (mem == MEMBLOCK_ERROR)
+ if (!mem)
panic("can not find more space for range array");
/*
@@ -274,7 +274,7 @@ u64 __init memblock_x86_find_in_range_node(int nid, u64 start, u64 end, u64 size
{
u64 addr;
addr = find_memory_core_early(nid, size, align, start, end);
- if (addr != MEMBLOCK_ERROR)
+ if (addr)
return addr;
/* Fallback, should already have start end within node range */
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index fbeaaf4..fa1015d 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -226,10 +226,10 @@ static void __init setup_node_data(int nid, u64 start, u64 end)
} else {
nd_pa = memblock_x86_find_in_range_node(nid, nd_low, nd_high,
nd_size, SMP_CACHE_BYTES);
- if (nd_pa == MEMBLOCK_ERROR)
+ if (!nd_pa)
nd_pa = memblock_find_in_range(nd_low, nd_high,
nd_size, SMP_CACHE_BYTES);
- if (nd_pa == MEMBLOCK_ERROR) {
+ if (!nd_pa) {
pr_err("Cannot find %zu bytes in node %d\n",
nd_size, nid);
return;
@@ -395,7 +395,7 @@ static int __init numa_alloc_distance(void)
phys = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
size, PAGE_SIZE);
- if (phys == MEMBLOCK_ERROR) {
+ if (!phys) {
pr_warning("NUMA: Warning: can't allocate distance table!\n");
/* don't retry until explicitly reset */
numa_distance = (void *)1LU;
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index 3adebe7..58878b5 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -199,7 +199,7 @@ void __init init_alloc_remap(int nid, u64 start, u64 end)
/* allocate node memory and the lowmem remap area */
node_pa = memblock_find_in_range(start, end, size, LARGE_PAGE_BYTES);
- if (node_pa == MEMBLOCK_ERROR) {
+ if (!node_pa) {
pr_warning("remap_alloc: failed to allocate %lu bytes for node %d\n",
size, nid);
return;
@@ -209,7 +209,7 @@ void __init init_alloc_remap(int nid, u64 start, u64 end)
remap_pa = memblock_find_in_range(min_low_pfn << PAGE_SHIFT,
max_low_pfn << PAGE_SHIFT,
size, LARGE_PAGE_BYTES);
- if (remap_pa == MEMBLOCK_ERROR) {
+ if (!remap_pa) {
pr_warning("remap_alloc: failed to allocate %lu bytes remap area for node %d\n",
size, nid);
memblock_x86_free_range(node_pa, node_pa + size);
diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index d0ed086..e3d471c 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -351,7 +351,7 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
phys = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped),
phys_size, PAGE_SIZE);
- if (phys == MEMBLOCK_ERROR) {
+ if (!phys) {
pr_warning("NUMA: Warning: can't allocate copy of distance table, disabling emulation\n");
goto no_emu;
}
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 7525e38..d235ec5 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -2,8 +2,6 @@
#define _LINUX_MEMBLOCK_H
#ifdef __KERNEL__
-#define MEMBLOCK_ERROR 0
-
#ifdef CONFIG_HAVE_MEMBLOCK
/*
* Logical memory blocks.
@@ -164,7 +162,7 @@ static inline unsigned long memblock_region_reserved_end_pfn(const struct memblo
#else
static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
{
- return MEMBLOCK_ERROR;
+ return 0;
}
#endif /* CONFIG_HAVE_MEMBLOCK */
diff --git a/kernel/printk.c b/kernel/printk.c
index 3518539..b1d5a61 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -199,7 +199,7 @@ void __init setup_log_buf(int early)
unsigned long mem;
mem = memblock_alloc(new_log_buf_len, PAGE_SIZE);
- if (mem == MEMBLOCK_ERROR)
+ if (!mem)
return;
new_log_buf = __va(mem);
} else {
diff --git a/mm/memblock.c b/mm/memblock.c
index 9882a88..1969936 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -74,7 +74,7 @@ static phys_addr_t __init_memblock memblock_find_region(phys_addr_t start, phys_
/* In case, huge size is requested */
if (end < size)
- return MEMBLOCK_ERROR;
+ return 0;
base = round_down(end - size, align);
@@ -94,7 +94,7 @@ static phys_addr_t __init_memblock memblock_find_region(phys_addr_t start, phys_
base = round_down(res_base - size, align);
}
- return MEMBLOCK_ERROR;
+ return 0;
}
static phys_addr_t __init_memblock memblock_find_base(phys_addr_t size,
@@ -126,10 +126,10 @@ static phys_addr_t __init_memblock memblock_find_base(phys_addr_t size,
if (bottom >= top)
continue;
found = memblock_find_region(bottom, top, size, align);
- if (found != MEMBLOCK_ERROR)
+ if (found)
return found;
}
- return MEMBLOCK_ERROR;
+ return 0;
}
/*
@@ -214,10 +214,10 @@ static int __init_memblock memblock_double_array(struct memblock_type *type)
*/
if (use_slab) {
new_array = kmalloc(new_size, GFP_KERNEL);
- addr = new_array == NULL ? MEMBLOCK_ERROR : __pa(new_array);
+ addr = new_array ? __pa(new_array) : 0;
} else
addr = memblock_find_base(new_size, sizeof(phys_addr_t), 0, MEMBLOCK_ALLOC_ACCESSIBLE);
- if (addr == MEMBLOCK_ERROR) {
+ if (!addr) {
pr_err("memblock: Failed to double %s array from %ld to %ld entries !\n",
memblock_type_name(type), type->max, type->max * 2);
return -1;
@@ -478,8 +478,7 @@ phys_addr_t __init __memblock_alloc_base(phys_addr_t size, phys_addr_t align, ph
size = round_up(size, align);
found = memblock_find_base(size, align, 0, max_addr);
- if (found != MEMBLOCK_ERROR &&
- !memblock_add_region(&memblock.reserved, found, size))
+ if (found && !memblock_add_region(&memblock.reserved, found, size))
return found;
return 0;
@@ -559,14 +558,14 @@ static phys_addr_t __init memblock_alloc_nid_region(struct memblock_region *mp,
this_end = memblock_nid_range(start, end, &this_nid);
if (this_nid == nid) {
phys_addr_t ret = memblock_find_region(start, this_end, size, align);
- if (ret != MEMBLOCK_ERROR &&
+ if (ret &&
!memblock_add_region(&memblock.reserved, ret, size))
return ret;
}
start = this_end;
}
- return MEMBLOCK_ERROR;
+ return 0;
}
phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid)
@@ -588,7 +587,7 @@ phys_addr_t __init memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int n
for (i = 0; i < mem->cnt; i++) {
phys_addr_t ret = memblock_alloc_nid_region(&mem->regions[i],
size, align, nid);
- if (ret != MEMBLOCK_ERROR)
+ if (ret)
return ret;
}
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 6e93dc7..5b0eb06 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -43,7 +43,7 @@ static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
addr = find_memory_core_early(nid, size, align, goal, limit);
- if (addr == MEMBLOCK_ERROR)
+ if (!addr)
return NULL;
ptr = phys_to_virt(addr);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b6da6ed..c7f0e5b 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3878,13 +3878,13 @@ u64 __init find_memory_core_early(int nid, u64 size, u64 align,
addr = memblock_find_in_range(final_start, final_end, size, align);
- if (addr == MEMBLOCK_ERROR)
+ if (!addr)
continue;
return addr;
}
- return MEMBLOCK_ERROR;
+ return 0;
}
#endif
--
1.7.6
--
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