From 824552574162ac00ae636fa41386b1072379ea4a Mon Sep 17 00:00:00 2001 From: Dave Hansen Date: Mon, 4 Feb 2008 22:28:59 -0800 Subject: 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//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 [akpm@linux-foundation.org: fix mips build] Signed-off-by: Dave Hansen Signed-off-by: Ralf Baechle Signed-off-by: Matt Mackall Acked-by: David Rientjes Cc: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-ia64/processor.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include/asm-ia64') diff --git a/include/asm-ia64/processor.h b/include/asm-ia64/processor.h index be3b0ae43270..666385b68820 100644 --- a/include/asm-ia64/processor.h +++ b/include/asm-ia64/processor.h @@ -31,7 +31,8 @@ * each (assuming 8KB page size), for a total of 8TB of user virtual * address space. */ -#define TASK_SIZE (current->thread.task_size) +#define TASK_SIZE_OF(tsk) ((tsk)->thread.task_size) +#define TASK_SIZE TASK_SIZE_OF(current) /* * This decides where the kernel will search for a free chunk of vm -- cgit v1.2.3