Changeset 91b60499 in mainline for kernel/generic/src/sysinfo/sysinfo.c

Timestamp:

2017-09-30T06:29:42Z (7 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

300f4c4

Parents:

d076f16 (diff), 6636fb19 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge support for capabilities from lp:~jakub/helenos/caps

This commit introduces capabilities as task-local names for references to kernel
objects. Kernel objects are reference-counted wrappers for a select group of
objects allocated in and by the kernel that can be made accessible to userspace
in a controlled way via integer handles.

So far, a kernel object encapsulates either an irq_t or a phone_t.

Support for the former lead to the removal of kernel-assigned devnos and
unsecure deregistration of IRQs in which a random task was able to unregister
some other task's IRQ.

File:

• kernel/generic/src/sysinfo/sysinfo.c (modified) (2 diffs)

kernel/generic/src/sysinfo/sysinfo.c

@@ -700 +700 @@
         
         sysinfo_return_t ret;
+        ret.tag = SYSINFO_VAL_UNDEFINED;
         
         if (subtree != NULL) {
@@ -730 +731 @@
                         ret.data.size = size;
                 }
-        } else {
-                /* No item in the fixed sysinfo tree */
-                ret.tag = SYSINFO_VAL_UNDEFINED;
         }