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Subject[PATCH 04/33] x86-64, NUMA: Unify {acpi|amd}_{numa_init|scan_nodes}() arguments and return values
Date
The functions used during NUMA initialization - *_numa_init() and
*_scan_nodes() - have different arguments and return values. Unify
them such that they all take no argument and return 0 on success and
-errno on failure. This is in preparation for further NUMA init
cleanups.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
---
arch/x86/include/asm/acpi.h | 2 +-
arch/x86/include/asm/amd_nb.h | 2 +-
arch/x86/kernel/setup.c | 4 ++--
arch/x86/mm/amdtopology_64.c | 18 +++++++++---------
arch/x86/mm/numa_64.c | 2 +-
arch/x86/mm/srat_64.c | 4 ++--
drivers/acpi/numa.c | 9 ++++++---
7 files changed, 22 insertions(+), 19 deletions(-)
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 211ca3f..4e5dff9 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -187,7 +187,7 @@ struct bootnode;
extern int acpi_numa;
extern void acpi_get_nodes(struct bootnode *physnodes, unsigned long start,
unsigned long end);
-extern int acpi_scan_nodes(unsigned long start, unsigned long end);
+extern int acpi_scan_nodes(void);
#define NR_NODE_MEMBLKS (MAX_NUMNODES*2)

#ifdef CONFIG_NUMA_EMU
diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h
index 2b33c4d..dc3c6e3 100644
--- a/arch/x86/include/asm/amd_nb.h
+++ b/arch/x86/include/asm/amd_nb.h
@@ -16,7 +16,7 @@ struct bootnode;
extern int early_is_amd_nb(u32 value);
extern int amd_cache_northbridges(void);
extern void amd_flush_garts(void);
-extern int amd_numa_init(unsigned long start_pfn, unsigned long end_pfn);
+extern int amd_numa_init(void);
extern int amd_scan_nodes(void);
extern int amd_get_subcaches(int);
extern int amd_set_subcaches(int, int);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 756d640..96810a3 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -995,12 +995,12 @@ void __init setup_arch(char **cmdline_p)
/*
* Parse SRAT to discover nodes.
*/
- acpi = acpi_numa_init();
+ acpi = !acpi_numa_init();
#endif

#ifdef CONFIG_AMD_NUMA
if (!acpi)
- amd = !amd_numa_init(0, max_pfn);
+ amd = !amd_numa_init();
#endif

initmem_init(acpi, amd);
diff --git a/arch/x86/mm/amdtopology_64.c b/arch/x86/mm/amdtopology_64.c
index 2523c35..655ccff 100644
--- a/arch/x86/mm/amdtopology_64.c
+++ b/arch/x86/mm/amdtopology_64.c
@@ -51,7 +51,7 @@ static __init int find_northbridge(void)
return num;
}

- return -1;
+ return -ENOENT;
}

static __init void early_get_boot_cpu_id(void)
@@ -69,17 +69,17 @@ static __init void early_get_boot_cpu_id(void)
#endif
}

-int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
+int __init amd_numa_init(void)
{
- unsigned long start = PFN_PHYS(start_pfn);
- unsigned long end = PFN_PHYS(end_pfn);
+ unsigned long start = PFN_PHYS(0);
+ unsigned long end = PFN_PHYS(max_pfn);
unsigned numnodes;
unsigned long prevbase;
int i, nb, found = 0;
u32 nodeid, reg;

if (!early_pci_allowed())
- return -1;
+ return -EINVAL;

nb = find_northbridge();
if (nb < 0)
@@ -90,7 +90,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
reg = read_pci_config(0, nb, 0, 0x60);
numnodes = ((reg >> 4) & 0xF) + 1;
if (numnodes <= 1)
- return -1;
+ return -ENOENT;

pr_info("Number of physical nodes %d\n", numnodes);

@@ -121,7 +121,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
if ((base >> 8) & 3 || (limit >> 8) & 3) {
pr_err("Node %d using interleaving mode %lx/%lx\n",
nodeid, (base >> 8) & 3, (limit >> 8) & 3);
- return -1;
+ return -EINVAL;
}
if (node_isset(nodeid, nodes_parsed)) {
pr_info("Node %d already present, skipping\n",
@@ -160,7 +160,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
if (prevbase > base) {
pr_err("Node map not sorted %lx,%lx\n",
prevbase, base);
- return -1;
+ return -EINVAL;
}

pr_info("Node %d MemBase %016lx Limit %016lx\n",
@@ -177,7 +177,7 @@ int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
}

if (!found)
- return -1;
+ return -ENOENT;
return 0;
}

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index d7e4aaf..a083f51 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -596,7 +596,7 @@ void __init initmem_init(int acpi, int amd)
#endif

#ifdef CONFIG_ACPI_NUMA
- if (!numa_off && acpi && !acpi_scan_nodes(0, max_pfn << PAGE_SHIFT))
+ if (!numa_off && acpi && !acpi_scan_nodes())
return;
nodes_clear(node_possible_map);
nodes_clear(node_online_map);
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 988b0b7..4f9dbf0 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -359,7 +359,7 @@ void __init acpi_get_nodes(struct bootnode *physnodes, unsigned long start,
#endif /* CONFIG_NUMA_EMU */

/* Use the information discovered above to actually set up the nodes. */
-int __init acpi_scan_nodes(unsigned long start, unsigned long end)
+int __init acpi_scan_nodes(void)
{
int i;

@@ -368,7 +368,7 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)

/* First clean up the node list */
for (i = 0; i < MAX_NUMNODES; i++)
- cutoff_node(i, start, end);
+ cutoff_node(i, 0, max_pfn << PAGE_SHIFT);

/*
* Join together blocks on the same node, holes between
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index 5eb25eb..3b5c318 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -274,7 +274,7 @@ acpi_table_parse_srat(enum acpi_srat_type id,

int __init acpi_numa_init(void)
{
- int ret = 0;
+ int cnt = 0;

/*
* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
@@ -288,7 +288,7 @@ int __init acpi_numa_init(void)
acpi_parse_x2apic_affinity, 0);
acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
acpi_parse_processor_affinity, 0);
- ret = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
+ cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
acpi_parse_memory_affinity,
NR_NODE_MEMBLKS);
}
@@ -297,7 +297,10 @@ int __init acpi_numa_init(void)
acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);

acpi_numa_arch_fixup();
- return ret;
+
+ if (cnt <= 0)
+ return cnt ?: -ENOENT;
+ return 0;
}

int acpi_get_pxm(acpi_handle h)
--
1.7.1


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