X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=Documentation%2Fioctl%2Fioctl-decoding.txt;h=e35efb0cec2e64a99538d24c2c7c7b38846abc26;hb=db1c5628eb8a321af7585e58019de99ccd2f28b2;hp=bfdf7f3ee4f05e0f52e08c8aee1ad55c248b8af4;hpb=a57bf8a4f23cca2b5be5446649bbe22d1440af5d;p=firefly-linux-kernel-4.4.55.git diff --git a/Documentation/ioctl/ioctl-decoding.txt b/Documentation/ioctl/ioctl-decoding.txt index bfdf7f3ee4f0..e35efb0cec2e 100644 --- a/Documentation/ioctl/ioctl-decoding.txt +++ b/Documentation/ioctl/ioctl-decoding.txt @@ -1,6 +1,6 @@ To decode a hex IOCTL code: -Most architecures use this generic format, but check +Most architectures use this generic format, but check include/ARCH/ioctl.h for specifics, e.g. powerpc uses 3 bits to encode read/write and 13 bits for size. @@ -18,7 +18,7 @@ uses 3 bits to encode read/write and 13 bits for size. 7-0 function # - So for example 0x82187201 is a read with arg length of 0x218, +So for example 0x82187201 is a read with arg length of 0x218, character 'r' function 1. Grepping the source reveals this is: #define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2])