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| author | Bob Moore <robert.moore@intel.com> | 2014-02-26 10:28:32 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-02-27 00:45:59 +0100 |
| commit | 4ac4c5fad8a320f75cb84543403fb8bae5ad2254 (patch) | |
| tree | 93b6c6a9dbc086412a1c2603cd5b47cc4d322e1f /include/acpi/acconfig.h | |
| parent | 4dde507fc1984435f28862ddd1beb90822aa116c (diff) | |
| download | lwn-4ac4c5fad8a320f75cb84543403fb8bae5ad2254.tar.gz lwn-4ac4c5fad8a320f75cb84543403fb8bae5ad2254.zip | |
ACPICA: Headers: Deploy #pragma pack (push) and (pop).
Use push and pop to both guarantee that the correct alignment is used,
and to restore the alignment to whatever it was before the header
was included.
It is reported that the #pragma pack(push/pop) directives are not supported
by the specific GCCs, but this patch still doesn't affect kernel build
as there are already #pragma pack([1]) directives used in the old ACPICA
headers, which means there shouldn't be GCCs that are currently used to
compile the ACPI kernels do not support #pragma pack() directives.
References: https://bugs.acpica.org/show_bug.cgi?id=1058
Signed-off-by: Bob Moore <robert.moore@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 'include/acpi/acconfig.h')
| -rw-r--r-- | include/acpi/acconfig.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h index 932a60d6ed82..d8a0ba8f88a5 100644 --- a/include/acpi/acconfig.h +++ b/include/acpi/acconfig.h @@ -44,6 +44,8 @@ #ifndef _ACCONFIG_H #define _ACCONFIG_H +#pragma pack(push) /* Set default struct packing */ + /****************************************************************************** * * Configuration options @@ -229,4 +231,6 @@ #define ACPI_DEBUGGER_COMMAND_PROMPT '-' #define ACPI_DEBUGGER_EXECUTE_PROMPT '%' +#pragma pack(pop) /* Restore original struct packing */ + #endif /* _ACCONFIG_H */ |