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author | 2016-12-14 15:04:39 +0800 | |
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committer | 2016-12-21 02:36:38 +0100 | |
commit | 6b11d1d677132816252004426ef220ccd3c92d2f (patch) | |
tree | a512975fe6a4602264de5cbccd8926d0c121a0e6 /arch/arm64/kernel/acpi.c | |
parent | ACPICA: Tables: Allow FADT to be customized with virtual address (diff) | |
download | linux-6b11d1d677132816252004426ef220ccd3c92d2f.tar.gz linux-6b11d1d677132816252004426ef220ccd3c92d2f.tar.bz2 linux-6b11d1d677132816252004426ef220ccd3c92d2f.zip |
ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users
This patch removes the users of the deprectated APIs:
acpi_get_table_with_size()
early_acpi_os_unmap_memory()
The following APIs should be used instead of:
acpi_get_table()
acpi_put_table()
The deprecated APIs are invented to be a replacement of acpi_get_table()
during the early stage so that the early mapped pointer will not be stored
in ACPICA core and thus the late stage acpi_get_table() won't return a
wrong pointer. The mapping size is returned just because it is required by
early_acpi_os_unmap_memory() to unmap the pointer during early stage.
But as the mapping size equals to the acpi_table_header.length
(see acpi_tb_init_table_descriptor() and acpi_tb_validate_table()), when
such a convenient result is returned, driver code will start to use it
instead of accessing acpi_table_header to obtain the length.
Thus this patch cleans up the drivers by replacing returned table size with
acpi_table_header.length, and should be a no-op.
Reported-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/arm64/kernel/acpi.c')
-rw-r--r-- | arch/arm64/kernel/acpi.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 252a6d9c1da5..64d9cbd61678 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -132,14 +132,13 @@ static int __init acpi_fadt_sanity_check(void) struct acpi_table_header *table; struct acpi_table_fadt *fadt; acpi_status status; - acpi_size tbl_size; int ret = 0; /* * FADT is required on arm64; retrieve it to check its presence * and carry out revision and ACPI HW reduced compliancy tests */ - status = acpi_get_table_with_size(ACPI_SIG_FADT, 0, &table, &tbl_size); + status = acpi_get_table(ACPI_SIG_FADT, 0, &table); if (ACPI_FAILURE(status)) { const char *msg = acpi_format_exception(status); @@ -170,10 +169,10 @@ static int __init acpi_fadt_sanity_check(void) out: /* - * acpi_get_table_with_size() creates FADT table mapping that + * acpi_get_table() creates FADT table mapping that * should be released after parsing and before resuming boot */ - early_acpi_os_unmap_memory(table, tbl_size); + acpi_put_table(table); return ret; } |