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authorDave Hansen <haveblue@us.ibm.com>2008-02-05 01:28:59 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-05 12:44:16 -0500
commit824552574162ac00ae636fa41386b1072379ea4a (patch)
tree85c595275c6007115ad002c56dbb7eb51ab67064 /include/asm-parisc
parentec4dd3eb35759f9fbeb5c1abb01403b2fde64cc9 (diff)
maps4: rework TASK_SIZE macros
The following replaces the earlier patches sent. It should address David Rientjes's comments, and has been compile tested on all the architectures that it touches, save for parisc. For the /proc/<pid>/pagemap code[1], we need to able to query how much virtual address space a particular task has. The trick is that we do it through /proc and can't use TASK_SIZE since it references "current" on some arches. The process opening the /proc file might be a 32-bit process opening a 64-bit process's pagemap file. x86_64 already has a TASK_SIZE_OF() macro: #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64) I'd like to have that for other architectures. So, add it for all the architectures that actually use "current" in their TASK_SIZE. For the others, just add a quick #define in sched.h to use plain old TASK_SIZE. 1. http://www.linuxworld.com/news/2007/042407-kernel.html - MIPS portion from Ralf Baechle <ralf@linux-mips.org> [akpm@linux-foundation.org: fix mips build] Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Matt Mackall <mpm@selenic.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-parisc')
-rw-r--r--include/asm-parisc/processor.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-parisc/processor.h b/include/asm-parisc/processor.h
index 6b294fb07a23..3bb06e898fde 100644
--- a/include/asm-parisc/processor.h
+++ b/include/asm-parisc/processor.h
@@ -32,7 +32,8 @@
32#endif 32#endif
33#define current_text_addr() ({ void *pc; current_ia(pc); pc; }) 33#define current_text_addr() ({ void *pc; current_ia(pc); pc; })
34 34
35#define TASK_SIZE (current->thread.task_size) 35#define TASK_SIZE_OF(tsk) ((tsk)->thread.task_size)
36#define TASK_SIZE TASK_SIZE_OF(current)
36#define TASK_UNMAPPED_BASE (current->thread.map_base) 37#define TASK_UNMAPPED_BASE (current->thread.map_base)
37 38
38#define DEFAULT_TASK_SIZE32 (0xFFF00000UL) 39#define DEFAULT_TASK_SIZE32 (0xFFF00000UL)