Message-ID: <[email protected]>
Patchset annotates arch/* uses of ->thread_info. Ones that really
are about access of thread_info of given process are simply switched to
task_thread_info(task); ones that deal with access to objects on stack
are switched to new helper - task_stack_page(). A _lot_ of the latter are
actually open-coded instances of "find where pt_regs are"; those are
consolidated into task_pt_regs(task) (many architectures actually have
such helper already).
Note that these annotations are not mandatory - any code not
converted to these helpers still works. However, they clean up a lot
of places and have actually caught a number of bugs, so converting out
of tree ports would be a good idea...
As an example of breakage caught by that stuff, see i386
pt_regs mess - we used to have it open-coded in a bunch of places
and when back in April Stas had fixed a bug in copy_thread(), the
rest had been left out of sync. That required two followup patches
(the latest - just before 2.6.15) _and_ still had left /proc/*/stat
eip field broken. Try ps -eo eip on i386 and watch the junk...
Patchset contents:
missing helper - task_stack_page()
alpha: task_thread_info()
alpha: task_stack_page()
alpha: task_pt_regs()
amd64: task_thread_info()
amd64: task_pt_regs()
amd64: task_stack_page()
i386: task_thread_info()
i386: fix task_pt_regs()
i386: task_stack_page()
sparc64: task_thread_info()
sparc64: task_stack_page()
sparc64: task_pt_regs()
sh: task_pt_regs()
sh: task_thread_info()
sh: task_stack_page()
sparc: task_thread_info()
sparc: task_stack_page()
uml: task_thread_info()
uml: task_stack_page()
s390: task_pt_regs()
s390: task_stack_page()
xtensa: task_pt_regs(), task_stack_page()
v850: task_stack_page(), task_pt_regs()
m32r: task_pt_regs(), task_stack_page(), task_thread_info()
frv: task_thread_info(), task_stack_page()
m68k: task_stack_page()
m68knommu: task_stack_page()
parisc: task_stack_page(), task_thread_info()
h8300: task_stack_page()
arm: task_thread_info()
arm: task_pt_regs()
arm: end_of_stack()
arm: task_stack_page()
arm26: task_thread_info()
arm26: task_pt_regs()
arm26: task_stack_page()
sh64: task_stack_page()
powerpc: task_thread_info()
powerpc: task_stack_page()
cris: task_pt_regs()
cris: fix KSTK_EIP
cris: task_thread_info()
ia64: task_thread_info()
ia64: task_pt_regs()
mips: namespace pollution: dump_regs() -> elf_dump_regs()
mips: task_pt_regs()
mips: task_thread_info()
mips: task_stack_page()
death of get_thread_info/put_thread_info
The only ordering requirements are that the first patch (introducing a
trivial #define for task_stack_page()) goes before the rest and that
patches for given architecture go in order.
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