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Date: Wed, 01 Aug 2012 16:59:39 -0400
From: Don Dutile <ddutile@...hat.com>
To: Feng Tang <feng.tang@...el.com>
CC: len.brown@...el.com, linux-acpi@...r.kernel.org,
yinghai@...nel.org, linux-kernel@...r.kernel.org, x86@...nel.org,
robert.moore@...el.com, agordeev@...hat.com,
suresh.b.siddha@...el.com
Subject: Re: [PATCH v2 1/2] ACPI: Replace acpi_get_table_with_size() with
acpi_get_table()
On 08/01/2012 02:37 AM, Feng Tang wrote:
> This is a preparation for removing the acpi_get_table_with_size(), as this
> function could be well covered by acpi_get_table(), and there is no need
> to have both of them to exist.
>
> v2: As reminded by Yinghai, apply the replacment to drivers/iommu/amd_iommu_init.c
> which is a new user of the acpi_get_table_with_size().
>
> Signed-off-by: Feng Tang<feng.tang@...el.com>
> ---
> arch/x86/kernel/apic/es7000_32.c | 7 +++----
> drivers/acpi/tables.c | 21 +++++++++------------
> drivers/iommu/amd_iommu_init.c | 10 ++++------
> drivers/iommu/dmar.c | 14 +++++++-------
> 4 files changed, 23 insertions(+), 29 deletions(-)
>
> diff --git a/arch/x86/kernel/apic/es7000_32.c b/arch/x86/kernel/apic/es7000_32.c
> index 0874799..ae30b39 100644
> --- a/arch/x86/kernel/apic/es7000_32.c
> +++ b/arch/x86/kernel/apic/es7000_32.c
> @@ -242,19 +242,18 @@ static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
> {
> struct acpi_table_header *header = NULL;
> struct es7000_oem_table *table;
> - acpi_size tbl_size;
> acpi_status ret;
> int i = 0;
>
> for (;;) {
> - ret = acpi_get_table_with_size("OEM1", i++,&header,&tbl_size);
> + ret = acpi_get_table("OEM1", i++,&header);
> if (!ACPI_SUCCESS(ret))
> return -1;
>
> if (!memcmp((char *)&header->oem_id, "UNISYS", 6))
> break;
>
> - early_acpi_os_unmap_memory(header, tbl_size);
> + early_acpi_os_unmap_memory(header, header->length);
> }
>
> table = (void *)header;
> @@ -262,7 +261,7 @@ static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
> oem_addrX = table->OEMTableAddr;
> oem_size = table->OEMTableSize;
>
> - early_acpi_os_unmap_memory(header, tbl_size);
> + early_acpi_os_unmap_memory(header, header->length);
>
> *oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
>
> diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
> index f336bca..5b8b7e0 100644
> --- a/drivers/acpi/tables.c
> +++ b/drivers/acpi/tables.c
> @@ -211,7 +211,6 @@ acpi_table_parse_entries(char *id,
> struct acpi_subtable_header *entry;
> unsigned int count = 0;
> unsigned long table_end;
> - acpi_size tbl_size;
>
> if (acpi_disabled)
> return -ENODEV;
> @@ -220,9 +219,9 @@ acpi_table_parse_entries(char *id,
> return -EINVAL;
>
> if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
> - acpi_get_table_with_size(id, acpi_apic_instance,&table_header,&tbl_size);
> + acpi_get_table(id, acpi_apic_instance,&table_header);
> else
> - acpi_get_table_with_size(id, 0,&table_header,&tbl_size);
> + acpi_get_table(id, 0,&table_header);
>
> if (!table_header) {
> printk(KERN_WARNING PREFIX "%4.4s not present\n", id);
> @@ -241,7 +240,7 @@ acpi_table_parse_entries(char *id,
> if (entry->type == entry_id
> && (!max_entries || count++< max_entries))
> if (handler(entry, table_end)) {
> - early_acpi_os_unmap_memory((char *)table_header, tbl_size);
> + early_acpi_os_unmap_memory((char *)table_header, table_header->length);
> return -EINVAL;
> }
>
> @@ -253,7 +252,7 @@ acpi_table_parse_entries(char *id,
> "%i found\n", id, entry_id, count - max_entries, count);
> }
>
> - early_acpi_os_unmap_memory((char *)table_header, tbl_size);
> + early_acpi_os_unmap_memory((char *)table_header, table_header->length);
> return count;
> }
>
> @@ -278,7 +277,6 @@ acpi_table_parse_madt(enum acpi_madt_type id,
> int __init acpi_table_parse(char *id, acpi_table_handler handler)
> {
> struct acpi_table_header *table = NULL;
> - acpi_size tbl_size;
>
> if (acpi_disabled)
> return -ENODEV;
> @@ -287,13 +285,13 @@ int __init acpi_table_parse(char *id, acpi_table_handler handler)
> return -EINVAL;
>
> if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
> - acpi_get_table_with_size(id, acpi_apic_instance,&table,&tbl_size);
> + acpi_get_table(id, acpi_apic_instance,&table);
> else
> - acpi_get_table_with_size(id, 0,&table,&tbl_size);
> + acpi_get_table(id, 0,&table);
>
> if (table) {
> handler(table);
> - early_acpi_os_unmap_memory(table, tbl_size);
> + early_acpi_os_unmap_memory(table, table->length);
> return 0;
> } else
> return 1;
> @@ -307,9 +305,8 @@ int __init acpi_table_parse(char *id, acpi_table_handler handler)
> static void __init check_multiple_madt(void)
> {
> struct acpi_table_header *table = NULL;
> - acpi_size tbl_size;
>
> - acpi_get_table_with_size(ACPI_SIG_MADT, 2,&table,&tbl_size);
> + acpi_get_table(ACPI_SIG_MADT, 2,&table);
> if (table) {
> printk(KERN_WARNING PREFIX
> "BIOS bug: multiple APIC/MADT found,"
> @@ -318,7 +315,7 @@ static void __init check_multiple_madt(void)
> "If \"acpi_apic_instance=%d\" works better, "
> "notify linux-acpi@...r.kernel.org\n",
> acpi_apic_instance ? 0 : 2);
> - early_acpi_os_unmap_memory(table, tbl_size);
> + early_acpi_os_unmap_memory(table, table->length);
>
> } else
> acpi_apic_instance = 0;
> diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
> index 500e7f1..6b19f42 100644
> --- a/drivers/iommu/amd_iommu_init.c
> +++ b/drivers/iommu/amd_iommu_init.c
> @@ -1525,14 +1525,13 @@ static void __init free_on_init_error(void)
> static int __init early_amd_iommu_init(void)
> {
> struct acpi_table_header *ivrs_base;
> - acpi_size ivrs_size;
> acpi_status status;
> int i, ret = 0;
>
> if (!amd_iommu_detected)
> return -ENODEV;
>
> - status = acpi_get_table_with_size("IVRS", 0,&ivrs_base,&ivrs_size);
> + status = acpi_get_table("IVRS", 0,&ivrs_base);
> if (status == AE_NOT_FOUND)
> return -ENODEV;
> else if (ACPI_FAILURE(status)) {
> @@ -1614,7 +1613,7 @@ static int __init early_amd_iommu_init(void)
>
> out:
> /* Don't leak any ACPI memory */
> - early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_size);
> + early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_base->length);
> ivrs_base = NULL;
>
> return ret;
> @@ -1638,10 +1637,9 @@ out:
> static bool detect_ivrs(void)
> {
> struct acpi_table_header *ivrs_base;
> - acpi_size ivrs_size;
> acpi_status status;
>
> - status = acpi_get_table_with_size("IVRS", 0,&ivrs_base,&ivrs_size);
> + status = acpi_get_table("IVRS", 0,&ivrs_base);
> if (status == AE_NOT_FOUND)
> return false;
> else if (ACPI_FAILURE(status)) {
> @@ -1650,7 +1648,7 @@ static bool detect_ivrs(void)
> return false;
> }
>
> - early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_size);
> + early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_base->length);
>
> return true;
> }
> diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
> index 86e2f4a..aa65b6f 100644
> --- a/drivers/iommu/dmar.c
> +++ b/drivers/iommu/dmar.c
> @@ -48,7 +48,6 @@
> LIST_HEAD(dmar_drhd_units);
>
> struct acpi_table_header * __initdata dmar_tbl;
> -static acpi_size dmar_tbl_size;
>
> static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd)
> {
> @@ -285,10 +284,8 @@ static int __init dmar_table_detect(void)
> acpi_status status = AE_OK;
>
> /* if we could find DMAR table, then there are DMAR devices */
> - status = acpi_get_table_with_size(ACPI_SIG_DMAR, 0,
> - (struct acpi_table_header **)&dmar_tbl,
> - &dmar_tbl_size);
> -
> + status = acpi_get_table(ACPI_SIG_DMAR, 0,
> + (struct acpi_table_header **)&dmar_tbl);
why is this cast needed if dmar_tbl is defined as struct acpi_table_header * ?
> if (ACPI_SUCCESS(status)&& !dmar_tbl) {
> pr_warn("Unable to map DMAR\n");
> status = AE_NOT_FOUND;
> @@ -558,8 +555,11 @@ int __init detect_intel_iommu(void)
> x86_init.iommu.iommu_init = intel_iommu_init;
> #endif
> }
> - early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size);
> - dmar_tbl = NULL;
> +
> + if (dmar_tbl) {
> + early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl->length);
> + dmar_tbl = NULL;
> + }
>
> return ret ? 1 : -ENODEV;
> }
--
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