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| Started by | Ming Lei <tom.leiming@gmail.com> |
|---|---|
| First post | 2015-10-10 17:30 +0200 |
| Last post | 2015-10-10 17:40 +0200 |
| Articles | 5 — 2 participants |
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[PATCH 0/2] iov_iter: use bvec iterator to implement iterate_bvec() Ming Lei <tom.leiming@gmail.com> - 2015-10-10 17:30 +0200
[PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() Ming Lei <tom.leiming@gmail.com> - 2015-10-10 17:30 +0200
Re: [PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() kbuild test robot <lkp@intel.com> - 2015-10-10 17:40 +0200
Re: [PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() Ming Lei <tom.leiming@gmail.com> - 2015-10-10 17:50 +0200
Re: [PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() kbuild test robot <lkp@intel.com> - 2015-10-10 17:40 +0200
| From | Ming Lei <tom.leiming@gmail.com> |
|---|---|
| Date | 2015-10-10 17:30 +0200 |
| Subject | [PATCH 0/2] iov_iter: use bvec iterator to implement iterate_bvec() |
| Message-ID | <qi4fT-4T5-3@gated-at.bofh.it> |
Hi, This patch uses bvec's iterator to implement iterate_bvec() of iov_iter, so we can avoid to invent new wheel for this job. Thanks, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Ming Lei <tom.leiming@gmail.com> |
|---|---|
| Date | 2015-10-10 17:30 +0200 |
| Subject | [PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() |
| Message-ID | <qi4fT-4T5-15@gated-at.bofh.it> |
| In reply to | #1243914 |
bvec has provided one iterator already, so not necessary
to invent a new wheel for this job.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
---
lib/iov_iter.c | 27 +++++++++------------------
1 file changed, 9 insertions(+), 18 deletions(-)
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 75232ad..e5cfc5c 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -3,6 +3,7 @@
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include <linux/bio.h>
#include <net/checksum.h>
#define iterate_iovec(i, n, __v, __p, skip, STEP) { \
@@ -57,28 +58,18 @@
}
#define iterate_bvec(i, n, __v, __p, skip, STEP) { \
- size_t wanted = n; \
+ struct bvec_iter __bi, __start; \
+ __start.bi_size = n; \
+ __start.bi_bvec_done = skip; \
+ __start.bi_idx = 0; \
__p = i->bvec; \
- __v.bv_len = min_t(size_t, n, __p->bv_len - skip); \
- if (likely(__v.bv_len)) { \
- __v.bv_page = __p->bv_page; \
- __v.bv_offset = __p->bv_offset + skip; \
+ for_each_bvec(__v, __p, __bi, __start) { \
(void)(STEP); \
- skip += __v.bv_len; \
- n -= __v.bv_len; \
} \
- while (unlikely(n)) { \
- __p++; \
- __v.bv_len = min_t(size_t, n, __p->bv_len); \
- if (unlikely(!__v.bv_len)) \
- continue; \
- __v.bv_page = __p->bv_page; \
- __v.bv_offset = __p->bv_offset; \
- (void)(STEP); \
+ if (!__bi.bi_idx) \
+ skip += __v.bv_len; \
+ else \
skip = __v.bv_len; \
- n -= __v.bv_len; \
- } \
- n = wanted; \
}
#define iterate_all_kinds(i, n, v, I, B, K) { \
--
1.9.1
--
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| From | kbuild test robot <lkp@intel.com> |
|---|---|
| Date | 2015-10-10 17:40 +0200 |
| Subject | Re: [PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() |
| Message-ID | <qi4pA-54b-15@gated-at.bofh.it> |
| In reply to | #1243915 |
[Multipart message — attachments visible in raw view] — view raw
Hi Ming,
[auto build test ERROR on v4.3-rc4 -- if it's inappropriate base, please ignore]
config: i386-randconfig-s1-201540 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All error/warnings (new ones prefixed by >>):
lib/iov_iter.c: In function 'copy_to_iter':
>> lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:25: error: storage size of '__start' isn't known
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:66:2: error: implicit declaration of function 'for_each_bvec' [-Werror=implicit-function-declaration]
for_each_bvec(__v, __p, __bi, __start) { \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:66:41: error: expected ';' before '{' token
for_each_bvec(__v, __p, __bi, __start) { \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:71:2: error: 'else' without a previous 'if'
else \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:25: warning: unused variable '__start' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:19: warning: unused variable '__bi' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c: In function 'copy_from_iter':
>> lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:25: error: storage size of '__start' isn't known
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:66:41: error: expected ';' before '{' token
for_each_bvec(__v, __p, __bi, __start) { \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:71:2: error: 'else' without a previous 'if'
else \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:25: warning: unused variable '__start' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:19: warning: unused variable '__bi' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c: In function 'copy_from_iter_nocache':
>> lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:428:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:25: error: storage size of '__start' isn't known
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:428:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:66:41: error: expected ';' before '{' token
for_each_bvec(__v, __p, __bi, __start) { \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:428:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:71:2: error: 'else' without a previous 'if'
else \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:428:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:25: warning: unused variable '__start' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:428:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
>> lib/iov_iter.c:61:19: warning: unused variable '__bi' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:428:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c: In function 'iov_iter_zero':
>> lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known
struct bvec_iter __bi, __start; \
^
lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:474:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
vim +61 lib/iov_iter.c
55 n -= __v.iov_len; \
56 } \
57 n = wanted; \
58 }
59
60 #define iterate_bvec(i, n, __v, __p, skip, STEP) { \
> 61 struct bvec_iter __bi, __start; \
62 __start.bi_size = n; \
63 __start.bi_bvec_done = skip; \
64 __start.bi_idx = 0; \
65 __p = i->bvec; \
> 66 for_each_bvec(__v, __p, __bi, __start) { \
67 (void)(STEP); \
68 } \
69 if (!__bi.bi_idx) \
70 skip += __v.bv_len; \
> 71 else \
72 skip = __v.bv_len; \
73 }
74
75 #define iterate_all_kinds(i, n, v, I, B, K) { \
76 size_t skip = i->iov_offset; \
77 if (unlikely(i->type & ITER_BVEC)) { \
78 const struct bio_vec *bvec; \
79 struct bio_vec v; \
> 80 iterate_bvec(i, n, v, bvec, skip, (B)) \
81 } else if (unlikely(i->type & ITER_KVEC)) { \
82 const struct kvec *kvec; \
83 struct kvec v; \
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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| From | Ming Lei <tom.leiming@gmail.com> |
|---|---|
| Date | 2015-10-10 17:50 +0200 |
| Subject | Re: [PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() |
| Message-ID | <qi4zg-5fs-23@gated-at.bofh.it> |
| In reply to | #1243920 |
On Sat, Oct 10, 2015 at 11:33 PM, kbuild test robot <lkp@intel.com> wrote: > Hi Ming, > > [auto build test ERROR on v4.3-rc4 -- if it's inappropriate base, please ignore] > > config: i386-randconfig-s1-201540 (attached as .config) > reproduce: > # save the attached .config to linux build tree > make ARCH=i386 > > All error/warnings (new ones prefixed by >>): > > lib/iov_iter.c: In function 'copy_to_iter': >>> lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known > struct bvec_iter __bi, __start; \ > ^ > lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec' > iterate_bvec(i, n, v, bvec, skip, (B)) \ The warning is because CONFIG_BLOCK is disabled, maybe bvec iterator helpers still need to include even though CONFIG_BLOCK is disabled. -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | kbuild test robot <lkp@intel.com> |
|---|---|
| Date | 2015-10-10 17:40 +0200 |
| Subject | Re: [PATCH 2/2] iov_iter: use bvec iterator to implement iterate_bvec() |
| Message-ID | <qi4pA-54b-31@gated-at.bofh.it> |
| In reply to | #1243915 |
[Multipart message — attachments visible in raw view] — view raw
Hi Ming,
[auto build test WARNING on v4.3-rc4 -- if it's inappropriate base, please ignore]
config: x86_64-randconfig-x015-201540 (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All warnings (new ones prefixed by >>):
lib/iov_iter.c: In function 'copy_to_iter':
lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
>> lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:61:25: error: storage size of '__start' isn't known
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
>> lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:66:2: error: implicit declaration of function 'for_each_bvec' [-Werror=implicit-function-declaration]
for_each_bvec(__v, __p, __bi, __start) { \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
>> lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:66:41: error: expected ';' before '{' token
for_each_bvec(__v, __p, __bi, __start) { \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
>> lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:71:2: error: 'else' without a previous 'if'
else \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
>> lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:61:25: warning: unused variable '__start' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
>> lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:61:19: warning: unused variable '__bi' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
>> lib/iov_iter.c:386:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c: In function 'copy_from_iter':
lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:61:25: error: storage size of '__start' isn't known
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:66:41: error: expected ';' before '{' token
for_each_bvec(__v, __p, __bi, __start) { \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:71:2: error: 'else' without a previous 'if'
else \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:61:25: warning: unused variable '__start' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c:61:19: warning: unused variable '__bi' [-Wunused-variable]
struct bvec_iter __bi, __start; \
^
>> lib/iov_iter.c:97:3: note: in expansion of macro 'iterate_bvec'
iterate_bvec(i, n, v, bvec, skip, (B)) \
^
lib/iov_iter.c:407:2: note: in expansion of macro 'iterate_and_advance'
iterate_and_advance(i, bytes, v,
^
lib/iov_iter.c: In function 'copy_from_iter_nocache':
lib/iov_iter.c:61:19: error: storage size of '__bi' isn't known
struct bvec_iter __bi, __start; \
^
vim +/iterate_bvec +97 lib/iov_iter.c
a280455f mm/iov_iter.c Al Viro 2014-11-27 55 n -= __v.iov_len; \
a280455f mm/iov_iter.c Al Viro 2014-11-27 56 } \
a280455f mm/iov_iter.c Al Viro 2014-11-27 57 n = wanted; \
a280455f mm/iov_iter.c Al Viro 2014-11-27 58 }
a280455f mm/iov_iter.c Al Viro 2014-11-27 59
04a31165 mm/iov_iter.c Al Viro 2014-11-27 60 #define iterate_bvec(i, n, __v, __p, skip, STEP) { \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 @61 struct bvec_iter __bi, __start; \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 62 __start.bi_size = n; \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 63 __start.bi_bvec_done = skip; \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 64 __start.bi_idx = 0; \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 65 __p = i->bvec; \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 66 for_each_bvec(__v, __p, __bi, __start) { \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 67 (void)(STEP); \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 68 } \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 69 if (!__bi.bi_idx) \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 70 skip += __v.bv_len; \
d8853dc1 lib/iov_iter.c Ming Lei 2015-10-10 71 else \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 72 skip = __v.bv_len; \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 73 }
04a31165 mm/iov_iter.c Al Viro 2014-11-27 74
a280455f mm/iov_iter.c Al Viro 2014-11-27 75 #define iterate_all_kinds(i, n, v, I, B, K) { \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 76 size_t skip = i->iov_offset; \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 77 if (unlikely(i->type & ITER_BVEC)) { \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 78 const struct bio_vec *bvec; \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 79 struct bio_vec v; \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 80 iterate_bvec(i, n, v, bvec, skip, (B)) \
a280455f mm/iov_iter.c Al Viro 2014-11-27 81 } else if (unlikely(i->type & ITER_KVEC)) { \
a280455f mm/iov_iter.c Al Viro 2014-11-27 82 const struct kvec *kvec; \
a280455f mm/iov_iter.c Al Viro 2014-11-27 83 struct kvec v; \
a280455f mm/iov_iter.c Al Viro 2014-11-27 84 iterate_kvec(i, n, v, kvec, skip, (K)) \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 85 } else { \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 86 const struct iovec *iov; \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 87 struct iovec v; \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 88 iterate_iovec(i, n, v, iov, skip, (I)) \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 89 } \
04a31165 mm/iov_iter.c Al Viro 2014-11-27 90 }
04a31165 mm/iov_iter.c Al Viro 2014-11-27 91
a280455f mm/iov_iter.c Al Viro 2014-11-27 92 #define iterate_and_advance(i, n, v, I, B, K) { \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 93 size_t skip = i->iov_offset; \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 94 if (unlikely(i->type & ITER_BVEC)) { \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 95 const struct bio_vec *bvec; \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 96 struct bio_vec v; \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 @97 iterate_bvec(i, n, v, bvec, skip, (B)) \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 98 if (skip == bvec->bv_len) { \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 99 bvec++; \
7ce2a91e mm/iov_iter.c Al Viro 2014-11-27 100 skip = 0; \
:::::: The code at line 97 was first introduced by commit
:::::: 7ce2a91e51288f308bfe5ea7e5743517c15c8e25 iov_iter.c: iterate_and_advance
:::::: TO: Al Viro <viro@zeniv.linux.org.uk>
:::::: CC: Al Viro <viro@zeniv.linux.org.uk>
---
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