From ea435467500612636f8f4fb639ff6e76b2496e4b Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Tue, 6 Jan 2009 14:40:39 -0800 Subject: atomic_t: unify all arch definitions The atomic_t type cannot currently be used in some header files because it would create an include loop with asm/atomic.h. Move the type definition to linux/types.h to break the loop. Signed-off-by: Matthew Wilcox Cc: Huang Ying Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-m32r/atomic.h | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) (limited to 'include/asm-m32r') diff --git a/include/asm-m32r/atomic.h b/include/asm-m32r/atomic.h index 3a38ffe4a4f..2eed30f8408 100644 --- a/include/asm-m32r/atomic.h +++ b/include/asm-m32r/atomic.h @@ -9,6 +9,7 @@ * Copyright (C) 2004 Hirokazu Takata */ +#include #include #include @@ -17,13 +18,6 @@ * resource counting etc.. */ -/* - * Make sure gcc doesn't try to be clever and move things around - * on us. We need to use _exactly_ the address the user gave us, - * not some alias that contains the same information. - */ -typedef struct { volatile int counter; } atomic_t; - #define ATOMIC_INIT(i) { (i) } /** -- cgit v1.2.3 From f15d411ad9986185303b556e0f5e7acafc4ef223 Mon Sep 17 00:00:00 2001 From: Harvey Harrison Date: Tue, 6 Jan 2009 14:56:33 -0800 Subject: m32r: introduce asm/swab.h Signed-off-by: Harvey Harrison Signed-off-by: Linus Torvalds --- include/asm-m32r/Kbuild | 1 + include/asm-m32r/byteorder.h | 7 +------ include/asm-m32r/swab.h | 10 ++++++++++ 3 files changed, 12 insertions(+), 6 deletions(-) create mode 100644 include/asm-m32r/swab.h (limited to 'include/asm-m32r') diff --git a/include/asm-m32r/Kbuild b/include/asm-m32r/Kbuild index c68e1680da0..27b108a86b3 100644 --- a/include/asm-m32r/Kbuild +++ b/include/asm-m32r/Kbuild @@ -1 +1,2 @@ include include/asm-generic/Kbuild.asm +unifdef-y += swab.h diff --git a/include/asm-m32r/byteorder.h b/include/asm-m32r/byteorder.h index 10b2c1d1161..61ff9cfd845 100644 --- a/include/asm-m32r/byteorder.h +++ b/include/asm-m32r/byteorder.h @@ -1,12 +1,7 @@ #ifndef _ASM_M32R_BYTEORDER_H #define _ASM_M32R_BYTEORDER_H -#include - -#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) -# define __BYTEORDER_HAS_U64__ -# define __SWAB_64_THRU_32__ -#endif +#include #if defined(__LITTLE_ENDIAN__) # include diff --git a/include/asm-m32r/swab.h b/include/asm-m32r/swab.h new file mode 100644 index 00000000000..97973e10182 --- /dev/null +++ b/include/asm-m32r/swab.h @@ -0,0 +1,10 @@ +#ifndef _ASM_M32R_SWAB_H +#define _ASM_M32R_SWAB_H + +#include + +#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) +# define __SWAB_64_THRU_32__ +#endif + +#endif /* _ASM_M32R_SWAB_H */ -- cgit v1.2.3 From 8feae13110d60cc6287afabc2887366b0eb226c2 Mon Sep 17 00:00:00 2001 From: David Howells Date: Thu, 8 Jan 2009 12:04:47 +0000 Subject: NOMMU: Make VMAs per MM as for MMU-mode linux Make VMAs per mm_struct as for MMU-mode linux. This solves two problems: (1) In SYSV SHM where nattch for a segment does not reflect the number of shmat's (and forks) done. (2) In mmap() where the VMA's vm_mm is set to point to the parent mm by an exec'ing process when VM_EXECUTABLE is specified, regardless of the fact that a VMA might be shared and already have its vm_mm assigned to another process or a dead process. A new struct (vm_region) is introduced to track a mapped region and to remember the circumstances under which it may be shared and the vm_list_struct structure is discarded as it's no longer required. This patch makes the following additional changes: (1) Regions are now allocated with alloc_pages() rather than kmalloc() and with no recourse to __GFP_COMP, so the pages are not composite. Instead, each page has a reference on it held by the region. Anything else that is interested in such a page will have to get a reference on it to retain it. When the pages are released due to unmapping, each page is passed to put_page() and will be freed when the page usage count reaches zero. (2) Excess pages are trimmed after an allocation as the allocation must be made as a power-of-2 quantity of pages. (3) VMAs are added to the parent MM's R/B tree and mmap lists. As an MM may end up with overlapping VMAs within the tree, the VMA struct address is appended to the sort key. (4) Non-anonymous VMAs are now added to the backing inode's prio list. (5) Holes may be punched in anonymous VMAs with munmap(), releasing parts of the backing region. The VMA and region structs will be split if necessary. (6) sys_shmdt() only releases one attachment to a SYSV IPC shared memory segment instead of all the attachments at that addresss. Multiple shmat()'s return the same address under NOMMU-mode instead of different virtual addresses as under MMU-mode. (7) Core dumping for ELF-FDPIC requires fewer exceptions for NOMMU-mode. (8) /proc/maps is now the global list of mapped regions, and may list bits that aren't actually mapped anywhere. (9) /proc/meminfo gains a line (tagged "MmapCopy") that indicates the amount of RAM currently allocated by mmap to hold mappable regions that can't be mapped directly. These are copies of the backing device or file if not anonymous. These changes make NOMMU mode more similar to MMU mode. The downside is that NOMMU mode requires some extra memory to track things over NOMMU without this patch (VMAs are no longer shared, and there are now region structs). Signed-off-by: David Howells Tested-by: Mike Frysinger Acked-by: Paul Mundt --- include/asm-m32r/mmu.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/asm-m32r') diff --git a/include/asm-m32r/mmu.h b/include/asm-m32r/mmu.h index d9bd724479c..150cb92bb66 100644 --- a/include/asm-m32r/mmu.h +++ b/include/asm-m32r/mmu.h @@ -4,7 +4,6 @@ #if !defined(CONFIG_MMU) typedef struct { - struct vm_list_struct *vmlist; unsigned long end_brk; } mm_context_t; -- cgit v1.2.3