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Merge branch 'kmap_atomic' of git://github.com/congwang/linux

Browse source 
Pull kmap_atomic cleanup from Cong Wang.

It's been in -next for a long time, and it gets rid of the (no longer
used) second argument to k[un]map_atomic().

Fix up a few trivial conflicts in various drivers, and do an "evil
merge" to catch some new uses that have come in since Cong's tree.

* 'kmap_atomic' of git://github.com/congwang/linux: (59 commits)
  feature-removal-schedule.txt: schedule the deprecated form of kmap_atomic() for removal
  highmem: kill all __kmap_atomic() [swarren@nvidia.com: highmem: Fix ARM build break due to __kmap_atomic rename]
  drbd: remove the second argument of k[un]map_atomic()
  zcache: remove the second argument of k[un]map_atomic()
  gma500: remove the second argument of k[un]map_atomic()
  dm: remove the second argument of k[un]map_atomic()
  tomoyo: remove the second argument of k[un]map_atomic()
  sunrpc: remove the second argument of k[un]map_atomic()
  rds: remove the second argument of k[un]map_atomic()
  net: remove the second argument of k[un]map_atomic()
  mm: remove the second argument of k[un]map_atomic()
  lib: remove the second argument of k[un]map_atomic()
  power: remove the second argument of k[un]map_atomic()
  kdb: remove the second argument of k[un]map_atomic()
  udf: remove the second argument of k[un]map_atomic()
  ubifs: remove the second argument of k[un]map_atomic()
  squashfs: remove the second argument of k[un]map_atomic()
  reiserfs: remove the second argument of k[un]map_atomic()
  ocfs2: remove the second argument of k[un]map_atomic()
  ntfs: remove the second argument of k[un]map_atomic()
  ...
This commit is contained in:
Linus Torvalds 2012-03-21 09:40:26 -07:00
commit 9f3938346a
180 changed files with 921 additions and 969 deletions
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8
include/linux/bio.h
View file

@ -101,10 +101,10 @@ static inline int bio_has_allocated_vec(struct bio *bio)
* I/O completely on that queue (see ide-dma for example)
*/
#define __bio_kmap_atomic(bio, idx, kmtype) \
(kmap_atomic(bio_iovec_idx((bio), (idx))->bv_page, kmtype) + \
(kmap_atomic(bio_iovec_idx((bio), (idx))->bv_page) + \
bio_iovec_idx((bio), (idx))->bv_offset)
#define __bio_kunmap_atomic(addr, kmtype) kunmap_atomic(addr, kmtype)
#define __bio_kunmap_atomic(addr, kmtype) kunmap_atomic(addr)
/*
* merge helpers etc
@ -317,7 +317,7 @@ static inline char *bvec_kmap_irq(struct bio_vec *bvec, unsigned long *flags)
* balancing is a lot nicer this way
*/
local_irq_save(*flags);
addr = (unsigned long) kmap_atomic(bvec->bv_page, KM_BIO_SRC_IRQ);
addr = (unsigned long) kmap_atomic(bvec->bv_page);
BUG_ON(addr & ~PAGE_MASK);
@ -328,7 +328,7 @@ static inline void bvec_kunmap_irq(char *buffer, unsigned long *flags)
{
unsigned long ptr = (unsigned long) buffer & PAGE_MASK;
kunmap_atomic((void *) ptr, KM_BIO_SRC_IRQ);
kunmap_atomic((void *) ptr);
local_irq_restore(*flags);
}

79
include/linux/highmem.h
View file

@ -55,12 +55,12 @@ static inline void kunmap(struct page *page)
{
}
static inline void *__kmap_atomic(struct page *page)
static inline void *kmap_atomic(struct page *page)
{
pagefault_disable();
return page_address(page);
}
#define kmap_atomic_prot(page, prot) __kmap_atomic(page)
#define kmap_atomic_prot(page, prot) kmap_atomic(page)
static inline void __kunmap_atomic(void *addr)
{
@ -109,27 +109,62 @@ static inline void kmap_atomic_idx_pop(void)
#endif
/*
* Make both: kmap_atomic(page, idx) and kmap_atomic(page) work.
* NOTE:
* kmap_atomic() and kunmap_atomic() with two arguments are deprecated.
* We only keep them for backward compatibility, any usage of them
* are now warned.
*/
#define kmap_atomic(page, args...) __kmap_atomic(page)
#define PASTE(a, b) a ## b
#define PASTE2(a, b) PASTE(a, b)
#define NARG_(_2, _1, n, ...) n
#define NARG(...) NARG_(__VA_ARGS__, 2, 1, :)
static inline void __deprecated *kmap_atomic_deprecated(struct page *page,
enum km_type km)
{
return kmap_atomic(page);
}
#define kmap_atomic1(...) kmap_atomic(__VA_ARGS__)
#define kmap_atomic2(...) kmap_atomic_deprecated(__VA_ARGS__)
#define kmap_atomic(...) PASTE2(kmap_atomic, NARG(__VA_ARGS__)(__VA_ARGS__))
static inline void __deprecated __kunmap_atomic_deprecated(void *addr,
enum km_type km)
{
__kunmap_atomic(addr);
}
/*
* Prevent people trying to call kunmap_atomic() as if it were kunmap()
* kunmap_atomic() should get the return value of kmap_atomic, not the page.
*/
#define kunmap_atomic(addr, args...) \
do { \
BUILD_BUG_ON(__same_type((addr), struct page *)); \
__kunmap_atomic(addr); \
#define kunmap_atomic_deprecated(addr, km) \
do { \
BUILD_BUG_ON(__same_type((addr), struct page *)); \
__kunmap_atomic_deprecated(addr, km); \
} while (0)
#define kunmap_atomic_withcheck(addr) \
do { \
BUILD_BUG_ON(__same_type((addr), struct page *)); \
__kunmap_atomic(addr); \
} while (0)
#define kunmap_atomic1(...) kunmap_atomic_withcheck(__VA_ARGS__)
#define kunmap_atomic2(...) kunmap_atomic_deprecated(__VA_ARGS__)
#define kunmap_atomic(...) PASTE2(kunmap_atomic, NARG(__VA_ARGS__)(__VA_ARGS__))
/**** End of C pre-processor tricks for deprecated macros ****/
/* when CONFIG_HIGHMEM is not set these will be plain clear/copy_page */
#ifndef clear_user_highpage
static inline void clear_user_highpage(struct page *page, unsigned long vaddr)
{
void *addr = kmap_atomic(page, KM_USER0);
void *addr = kmap_atomic(page);
clear_user_page(addr, vaddr, page);
kunmap_atomic(addr, KM_USER0);
kunmap_atomic(addr);
}
#endif
@ -180,16 +215,16 @@ alloc_zeroed_user_highpage_movable(struct vm_area_struct *vma,
static inline void clear_highpage(struct page *page)
{
void *kaddr = kmap_atomic(page, KM_USER0);
void *kaddr = kmap_atomic(page);
clear_page(kaddr);
kunmap_atomic(kaddr, KM_USER0);
kunmap_atomic(kaddr);
}
static inline void zero_user_segments(struct page *page,
unsigned start1, unsigned end1,
unsigned start2, unsigned end2)
{
void *kaddr = kmap_atomic(page, KM_USER0);
void *kaddr = kmap_atomic(page);
BUG_ON(end1 > PAGE_SIZE || end2 > PAGE_SIZE);
@ -199,7 +234,7 @@ static inline void zero_user_segments(struct page *page,
if (end2 > start2)
memset(kaddr + start2, 0, end2 - start2);
kunmap_atomic(kaddr, KM_USER0);
kunmap_atomic(kaddr);
flush_dcache_page(page);
}
@ -228,11 +263,11 @@ static inline void copy_user_highpage(struct page *to, struct page *from,
{
char *vfrom, *vto;
vfrom = kmap_atomic(from, KM_USER0);
vto = kmap_atomic(to, KM_USER1);
vfrom = kmap_atomic(from);
vto = kmap_atomic(to);
copy_user_page(vto, vfrom, vaddr, to);
kunmap_atomic(vto, KM_USER1);
kunmap_atomic(vfrom, KM_USER0);
kunmap_atomic(vto);
kunmap_atomic(vfrom);
}
#endif
@ -241,11 +276,11 @@ static inline void copy_highpage(struct page *to, struct page *from)
{
char *vfrom, *vto;
vfrom = kmap_atomic(from, KM_USER0);
vto = kmap_atomic(to, KM_USER1);
vfrom = kmap_atomic(from);
vto = kmap_atomic(to);
copy_page(vto, vfrom);
kunmap_atomic(vto, KM_USER1);
kunmap_atomic(vfrom, KM_USER0);
kunmap_atomic(vto);
kunmap_atomic(vfrom);
}
#endif /* _LINUX_HIGHMEM_H */