diff options
| author | J. Bruce Fields <bfields@redhat.com> | 2012-10-09 18:35:22 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2012-10-09 18:35:22 -0400 |
| commit | f474af7051212b4efc8267583fad9c4ebf33ccff (patch) | |
| tree | 1aa46ebc8065a341f247c2a2d9af2f624ad1d4f8 /include/acpi/actbl1.h | |
| parent | 0d22f68f02c10d5d10ec5712917e5828b001a822 (diff) | |
| parent | e3dd9a52cb5552c46c2a4ca7ccdfb4dab5c72457 (diff) | |
nfs: disintegrate UAPI for nfs
This is to complete part of the Userspace API (UAPI) disintegration for which
the preparatory patches were pulled recently. After these patches, userspace
headers will be segregated into:
include/uapi/linux/.../foo.h
for the userspace interface stuff, and:
include/linux/.../foo.h
for the strictly kernel internal stuff.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'include/acpi/actbl1.h')
| -rw-r--r-- | include/acpi/actbl1.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h index 300d14e7c5d..280fc45b59d 100644 --- a/include/acpi/actbl1.h +++ b/include/acpi/actbl1.h @@ -79,9 +79,15 @@ #pragma pack(1) /* - * Note about bitfields: The u8 type is used for bitfields in ACPI tables. - * This is the only type that is even remotely portable. Anything else is not - * portable, so do not use any other bitfield types. + * Note: C bitfields are not used for this reason: + * + * "Bitfields are great and easy to read, but unfortunately the C language + * does not specify the layout of bitfields in memory, which means they are + * essentially useless for dealing with packed data in on-disk formats or + * binary wire protocols." (Or ACPI tables and buffers.) "If you ask me, + * this decision was a design error in C. Ritchie could have picked an order + * and stuck with it." Norman Ramsey. + * See http://stackoverflow.com/a/1053662/41661 */ /******************************************************************************* @@ -489,7 +495,9 @@ enum acpi_hest_notify_types { ACPI_HEST_NOTIFY_LOCAL = 2, ACPI_HEST_NOTIFY_SCI = 3, ACPI_HEST_NOTIFY_NMI = 4, - ACPI_HEST_NOTIFY_RESERVED = 5 /* 5 and greater are reserved */ + ACPI_HEST_NOTIFY_CMCI = 5, /* ACPI 5.0 */ + ACPI_HEST_NOTIFY_MCE = 6, /* ACPI 5.0 */ + ACPI_HEST_NOTIFY_RESERVED = 7 /* 7 and greater are reserved */ }; /* Values for config_write_enable bitfield above */ |