diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/accounting/getdelays.c | 6 | ||||
| -rw-r--r-- | Documentation/aoe/mkdevs.sh | 2 | ||||
| -rw-r--r-- | Documentation/aoe/udev-install.sh | 5 | ||||
| -rw-r--r-- | Documentation/aoe/udev.txt | 16 | ||||
| -rw-r--r-- | Documentation/feature-removal-schedule.txt | 19 | ||||
| -rw-r--r-- | Documentation/filesystems/isofs.txt | 1 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 50 | ||||
| -rw-r--r-- | Documentation/kernel-parameters.txt | 3 | ||||
| -rw-r--r-- | Documentation/mn10300/ABI.txt | 149 | ||||
| -rw-r--r-- | Documentation/mn10300/compartmentalisation.txt | 60 |
10 files changed, 275 insertions, 36 deletions
diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c index d6cb1a8..40121b5 100644 --- a/Documentation/accounting/getdelays.c +++ b/Documentation/accounting/getdelays.c @@ -168,7 +168,7 @@ int get_family_id(int sd) char buf[256]; } ans; - int id, rc; + int id = 0, rc; struct nlattr *na; int rep_len; @@ -209,7 +209,7 @@ void print_delayacct(struct taskstats *t) void task_context_switch_counts(struct taskstats *t) { printf("\n\nTask %15s%15s\n" - " %15lu%15lu\n", + " %15llu%15llu\n", "voluntary", "nonvoluntary", t->nvcsw, t->nivcsw); } @@ -399,7 +399,7 @@ int main(int argc, char *argv[]) goto done; } - PRINTF("nlmsghdr size=%d, nlmsg_len=%d, rep_len=%d\n", + PRINTF("nlmsghdr size=%zu, nlmsg_len=%d, rep_len=%d\n", sizeof(struct nlmsghdr), msg.n.nlmsg_len, rep_len); diff --git a/Documentation/aoe/mkdevs.sh b/Documentation/aoe/mkdevs.sh index 97374aa..44c0ab7 100644 --- a/Documentation/aoe/mkdevs.sh +++ b/Documentation/aoe/mkdevs.sh @@ -29,6 +29,8 @@ rm -f $dir/interfaces mknod -m 0200 $dir/interfaces c $MAJOR 4 rm -f $dir/revalidate mknod -m 0200 $dir/revalidate c $MAJOR 5 +rm -f $dir/flush +mknod -m 0200 $dir/flush c $MAJOR 6 export n_partitions mkshelf=`echo $0 | sed 's!mkdevs!mkshelf!'` diff --git a/Documentation/aoe/udev-install.sh b/Documentation/aoe/udev-install.sh index 6449911..15e86f5 100644 --- a/Documentation/aoe/udev-install.sh +++ b/Documentation/aoe/udev-install.sh @@ -23,7 +23,10 @@ fi # /etc/udev/rules.d # rules_d="`sed -n '/^udev_rules=/{ s!udev_rules=!!; s!\"!!g; p; }' $conf`" -if test -z "$rules_d" || test ! -d "$rules_d"; then +if test -z "$rules_d" ; then + rules_d=/etc/udev/rules.d +fi +if test ! -d "$rules_d"; then echo "$me Error: cannot find udev rules directory" 1>&2 exit 1 fi diff --git a/Documentation/aoe/udev.txt b/Documentation/aoe/udev.txt index a7ed1dc..8686e78 100644 --- a/Documentation/aoe/udev.txt +++ b/Documentation/aoe/udev.txt @@ -1,6 +1,7 @@ # These rules tell udev what device nodes to create for aoe support. -# They may be installed along the following lines (adjusted to what -# you see on your system). +# They may be installed along the following lines. Check the section +# 8 udev manpage to see whether your udev supports SUBSYSTEM, and +# whether it uses one or two equal signs for SUBSYSTEM and KERNEL. # # ecashin@makki ~$ su # Password: @@ -15,10 +16,11 @@ # # aoe char devices -SUBSYSTEM="aoe", KERNEL="discover", NAME="etherd/%k", GROUP="disk", MODE="0220" -SUBSYSTEM="aoe", KERNEL="err", NAME="etherd/%k", GROUP="disk", MODE="0440" -SUBSYSTEM="aoe", KERNEL="interfaces", NAME="etherd/%k", GROUP="disk", MODE="0220" -SUBSYSTEM="aoe", KERNEL="revalidate", NAME="etherd/%k", GROUP="disk", MODE="0220" +SUBSYSTEM=="aoe", KERNEL=="discover", NAME="etherd/%k", GROUP="disk", MODE="0220" +SUBSYSTEM=="aoe", KERNEL=="err", NAME="etherd/%k", GROUP="disk", MODE="0440" +SUBSYSTEM=="aoe", KERNEL=="interfaces", NAME="etherd/%k", GROUP="disk", MODE="0220" +SUBSYSTEM=="aoe", KERNEL=="revalidate", NAME="etherd/%k", GROUP="disk", MODE="0220" +SUBSYSTEM=="aoe", KERNEL=="flush", NAME="etherd/%k", GROUP="disk", MODE="0220" # aoe block devices -KERNEL="etherd*", NAME="%k", GROUP="disk" +KERNEL=="etherd*", NAME="%k", GROUP="disk" diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt index 17b1659..ce9503c 100644 --- a/Documentation/feature-removal-schedule.txt +++ b/Documentation/feature-removal-schedule.txt @@ -99,17 +99,6 @@ Who: Eric Biederman <ebiederm@xmission.com> --------------------------- -What: a.out interpreter support for ELF executables -When: 2.6.25 -Files: fs/binfmt_elf.c -Why: Using a.out interpreters for ELF executables was a feature for - transition from a.out to ELF. But now it is unlikely to be still - needed anymore and removing it would simplify the hairy ELF - loader code. -Who: Andi Kleen <ak@suse.de> - ---------------------------- - What: remove EXPORT_SYMBOL(kernel_thread) When: August 2006 Files: arch/*/kernel/*_ksyms.c @@ -192,14 +181,6 @@ Who: Len Brown <len.brown@intel.com> --------------------------- -What: 'time' kernel boot parameter -When: January 2008 -Why: replaced by 'printk.time=<value>' so that printk timestamps can be - enabled or disabled as needed -Who: Randy Dunlap <randy.dunlap@oracle.com> - ---------------------------- - What: libata spindown skipping and warning When: Dec 2008 Why: Some halt(8) implementations synchronize caches for and spin diff --git a/Documentation/filesystems/isofs.txt b/Documentation/filesystems/isofs.txt index 758e504..6973b98 100644 --- a/Documentation/filesystems/isofs.txt +++ b/Documentation/filesystems/isofs.txt @@ -24,6 +24,7 @@ Mount options unique to the isofs filesystem. map=normal Map non-Rock Ridge filenames to lower case map=acorn As map=normal but also apply Acorn extensions if present mode=xxx Sets the permissions on files to xxx + dmode=xxx Sets the permissions on directories to xxx nojoliet Ignore Joliet extensions if they are present. norock Ignore Rock Ridge extensions if they are present. hide Completely strip hidden files from the file system. diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index bd55038..81e5be6 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -151,7 +151,7 @@ The get_sb() method has the following arguments: const char *dev_name: the device name we are mounting. void *data: arbitrary mount options, usually comes as an ASCII - string + string (see "Mount Options" section) struct vfsmount *mnt: a vfs-internal representation of a mount point @@ -182,7 +182,7 @@ A fill_super() method implementation has the following arguments: must initialize this properly. void *data: arbitrary mount options, usually comes as an ASCII - string + string (see "Mount Options" section) int silent: whether or not to be silent on error @@ -291,7 +291,8 @@ or bottom half). umount_begin: called when the VFS is unmounting a filesystem. - show_options: called by the VFS to show mount options for /proc/<pid>/mounts. + show_options: called by the VFS to show mount options for + /proc/<pid>/mounts. (see "Mount Options" section) quota_read: called by the VFS to read from filesystem quota file. @@ -969,6 +970,49 @@ manipulate dentries: For further information on dentry locking, please refer to the document Documentation/filesystems/dentry-locking.txt. +Mount Options +============= + +Parsing options +--------------- + +On mount and remount the filesystem is passed a string containing a +comma separated list of mount options. The options can have either of +these forms: + + option + option=value + +The <linux/parser.h> header defines an API that helps parse these +options. There are plenty of examples on how to use it in existing +filesystems. + +Showing options +--------------- + +If a filesystem accepts mount options, it must define show_options() +to show all the currently active options. The rules are: + + - options MUST be shown which are not default or their values differ + from the default + + - options MAY be shown which are enabled by default or have their + default value + +Options used only internally between a mount helper and the kernel +(such as file descriptors), or which only have an effect during the +mounting (such as ones controlling the creation of a journal) are exempt +from the above rules. + +The underlying reason for the above rules is to make sure, that a +mount can be accurately replicated (e.g. umounting and mounting again) +based on the information found in /proc/mounts. + +A simple method of saving options at mount/remount time and showing +them is provided with the save_mount_options() and +generic_show_options() helper functions. Please note, that using +these may have drawbacks. For more info see header comments for these +functions in fs/namespace.c. Resources ========= diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 0dcbd26..a4fc7fc 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1973,9 +1973,6 @@ and is between 256 and 4096 characters. It is defined in the file <deci-seconds>: poll all this frequency 0: no polling (default) - time Show timing data prefixed to each printk message line - [deprecated, see 'printk.time'] - tipar.timeout= [HW,PPT] Set communications timeout in tenths of a second (default 15). diff --git a/Documentation/mn10300/ABI.txt b/Documentation/mn10300/ABI.txt new file mode 100644 index 0000000..1fef1f0 --- /dev/null +++ b/Documentation/mn10300/ABI.txt @@ -0,0 +1,149 @@ + ========================= + MN10300 FUNCTION CALL ABI + ========================= + +======= +GENERAL +======= + +The MN10300/AM33 kernel runs in little-endian mode; big-endian mode is not +supported. + +The stack grows downwards, and should always be 32-bit aligned. There are +separate stack pointer registers for userspace and the kernel. + + +================ +ARGUMENT PASSING +================ + +The first two arguments (assuming up to 32-bits per argument) to a function are +passed in the D0 and D1 registers respectively; all other arguments are passed +on the stack. + +If 64-bit arguments are being passed, then they are never split between +registers and the stack. If the first argument is a 64-bit value, it will be +passed in D0:D1. If the first argument is not a 64-bit value, but the second +is, the second will be passed entirely on the stack and D1 will be unused. + +Arguments smaller than 32-bits are not coelesced within a register or a stack +word. For example, two byte-sized arguments will always be passed in separate +registers or word-sized stack slots. + + +================= +CALLING FUNCTIONS +================= + +The caller must allocate twelve bytes on the stack for the callee's use before +it inserts a CALL instruction. The CALL instruction will write into the TOS +word, but won't actually modify the stack pointer; similarly, the RET +instruction reads from the TOS word of the stack, but doesn't move the stack +pointer beyond it. + + + Stack: + | | + | | + |---------------| SP+20 + | 4th Arg | + |---------------| SP+16 + | 3rd Arg | + |---------------| SP+12 + | D1 Save Slot | + |---------------| SP+8 + | D0 Save Slot | + |---------------| SP+4 + | Return Addr | + |---------------| SP + | | + | | + + +The caller must leave space on the stack (hence an allocation of twelve bytes) +in which the callee may store the first two arguments. + + +============ +RETURN VALUE +============ + +The return value is passed in D0 for an integer (or D0:D1 for a 64-bit value), +or A0 for a pointer. + +If the return value is a value larger than 64-bits, or is a structure or an +array, then a hidden first argument will be passed to the callee by the caller: +this will point to a piece of memory large enough to hold the result of the +function. In this case, the callee will return the value in that piece of +memory, and no value will be returned in D0 or A0. + + +=================== +REGISTER CLOBBERING +=================== + +The values in certain registers may be clobbered by the callee, and other +values must be saved: + + Clobber: D0-D1, A0-A1, E0-E3 + Save: D2-D3, A2-A3, E4-E7, SP + +All other non-supervisor-only registers are clobberable (such as MDR, MCRL, +MCRH). + + +================= +SPECIAL REGISTERS +================= + +Certain ordinary registers may carry special usage for the compiler: + + A3: Frame pointer + E2: TLS pointer + + +========== +KERNEL ABI +========== + +The kernel may use a slightly different ABI internally. + + (*) E2 + + If CONFIG_MN10300_CURRENT_IN_E2 is defined, then the current task pointer + will be kept in the E2 register, and that register will be marked + unavailable for the compiler to use as a scratch register. + + Normally the kernel uses something like: + + MOV SP,An + AND 0xFFFFE000,An + MOV (An),Rm // Rm holds current + MOV (yyy,Rm) // Access current->yyy + + To find the address of current; but since this option permits current to + be carried globally in an register, it can use: + + MOV (yyy,E2) // Access current->yyy + + instead. + + +=============== +SYSTEM CALL ABI +=============== + +System calls are called with the following convention: + + REGISTER ENTRY EXIT + =============== ======================= ======================= + D0 Syscall number Return value + A0 1st syscall argument Saved + D1 2nd syscall argument Saved + A3 3rd syscall argument Saved + A2 4th syscall argument Saved + D3 5th syscall argument Saved + D2 6th syscall argument Saved + +All other registers are saved. The layout is a consequence of the way the MOVM +instruction stores registers onto the stack. diff --git a/Documentation/mn10300/compartmentalisation.txt b/Documentation/mn10300/compartmentalisation.txt new file mode 100644 index 0000000..8958b51 --- /dev/null +++ b/Documentation/mn10300/compartmentalisation.txt @@ -0,0 +1,60 @@ + ========================================= + PART-SPECIFIC SOURCE COMPARTMENTALISATION + ========================================= + +The sources for various parts are compartmentalised at two different levels: + + (1) Processor level + + The "processor level" is a CPU core plus the other on-silicon + peripherals. + + Processor-specific header files are divided among directories in a similar + way to the CPU level: + + (*) include/asm-mn10300/proc-mn103e010/ + + Support for the AM33v2 CPU core. + + The appropriate processor is selected by a CONFIG_MN10300_PROC_YYYY option + from the "Processor support" choice menu in the arch/mn10300/Kconfig file. + + + (2) Unit level + + The "unit level" is a processor plus all the external peripherals + controlled by that processor. + + Unit-specific header files are divided among directories in a similar way + to the CPU level; not only that, but specific sources may also be + segregated into separate directories under the arch directory: + + (*) include/asm-mn10300/unit-asb2303/ + (*) arch/mn10300/unit-asb2303/ + + Support for the ASB2303 board with an ASB2308 daughter board. + + (*) include/asm-mn10300/unit-asb2305/ + (*) arch/mn10300/unit-asb2305/ + + Support for the ASB2305 board. + + The appropriate processor is selected by a CONFIG_MN10300_UNIT_ZZZZ option + from the "Unit type" choice menu in the arch/mn10300/Kconfig file. + + +============ +COMPILE TIME +============ + +When the kernel is compiled, symbolic links will be made in the asm header file +directory for this arch: + + include/asm-mn10300/proc => include/asm-mn10300/proc-YYYY/ + include/asm-mn10300/unit => include/asm-mn10300/unit-ZZZZ/ + +So that the header files contained in those directories can be accessed without +lots of #ifdef-age. + +The appropriate arch/mn10300/unit-ZZZZ directory will also be entered by the +compilation process; all other unit-specific directories will be ignored. |
