[lustre-devel] [PATCH v4] staging: lustre: Replace 'uint32_t' with 'u32' and 'uint64_t' with 'u64'
Dilger, Andreas
andreas.dilger at intel.com
Sun Dec 24 22:58:04 PST 2017
On Dec 19, 2017, at 10:56, Roman Storozhenko <romeusmeister at gmail.com> wrote:
>
> There are two reasons for replacing 'uint32_t' with 'u32'
> and 'uint64_t' with 'u64':
>
> 1) As Linus Torvalds have said we should use kernel types:
> http://lkml.iu.edu/hypermail//linux/kernel/1506.0/00160.html
>
> 2) There are only few places in the lustre codebase that use such types.
> In the most cases it uses 'u32' and 'u64'.
>
> Signed-off-by: Roman Storozhenko <romeusmeister at gmail.com>
Reviewed-by: Andreas Dilger <andreas.dilger at intel.com>
>
> ---
> In the third version of that patch Dan Carpenter pointed out that the patch
> body should be self-explanatory:
> "
>> There are two reasons for that:
> What I'm asking is there are two reasons for what? Where is the first
> part of that paragraph?
> "
>
> In the second version of this patch I forgot to add subsystem and
> driver. As Greg K-H mentioned:
> "Please fix up the subject to have the subsystem and driver name in it:
> Subject: [PATCH] staging: lustre: ..."
>
> In the first version of this patch I replaced 'uint32_t' with '__u32' and
> 'uint64_t' with '__u64'. I was suggested to fix that by Greg K-H:
>
> "The __ types are only needed for when you cross the user/kernel boundry.
> Otherwise just use the "normal" types of u32 and u64.
>
> Do the changes you made here all cross that boundry? If not, please fix
> this up."
>
> I asked lustre community whether those code used only in the kernel
> space and Andreas Dilger said:
>
> "These headers are for kernel code only, so should use the "u32" and
> similar
> types, rather than the "__u32" that are used for user-kernel
> structures."
>
> So I have replaced my first patch version with this one.
>
> drivers/staging/lustre/lustre/include/lustre_sec.h | 4 ++--
> drivers/staging/lustre/lustre/llite/vvp_dev.c | 2 +-
> drivers/staging/lustre/lustre/lov/lov_internal.h | 12 ++++++------
> drivers/staging/lustre/lustre/osc/osc_internal.h | 6 +++---
> 4 files changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/staging/lustre/lustre/include/lustre_sec.h b/drivers/staging/lustre/lustre/include/lustre_sec.h
> index a40f706..64b6fd4 100644
> --- a/drivers/staging/lustre/lustre/include/lustre_sec.h
> +++ b/drivers/staging/lustre/lustre/include/lustre_sec.h
> @@ -341,8 +341,8 @@ void sptlrpc_conf_client_adapt(struct obd_device *obd);
> #define SPTLRPC_MAX_PAYLOAD (1024)
>
> struct vfs_cred {
> - uint32_t vc_uid;
> - uint32_t vc_gid;
> + u32 vc_uid;
> + u32 vc_gid;
> };
>
> struct ptlrpc_ctx_ops {
> diff --git a/drivers/staging/lustre/lustre/llite/vvp_dev.c b/drivers/staging/lustre/lustre/llite/vvp_dev.c
> index 8ccc8b7..987c03b 100644
> --- a/drivers/staging/lustre/lustre/llite/vvp_dev.c
> +++ b/drivers/staging/lustre/lustre/llite/vvp_dev.c
> @@ -384,7 +384,7 @@ int cl_sb_fini(struct super_block *sb)
> struct vvp_pgcache_id {
> unsigned int vpi_bucket;
> unsigned int vpi_depth;
> - uint32_t vpi_index;
> + u32 vpi_index;
>
> unsigned int vpi_curdep;
> struct lu_object_header *vpi_obj;
> diff --git a/drivers/staging/lustre/lustre/lov/lov_internal.h b/drivers/staging/lustre/lustre/lov/lov_internal.h
> index ae28ddf..a56d71c 100644
> --- a/drivers/staging/lustre/lustre/lov/lov_internal.h
> +++ b/drivers/staging/lustre/lustre/lov/lov_internal.h
> @@ -115,19 +115,19 @@ static inline const struct lsm_operations *lsm_op_find(int magic)
> */
> #if BITS_PER_LONG == 64
> # define lov_do_div64(n, base) ({ \
> - uint64_t __base = (base); \
> - uint64_t __rem; \
> - __rem = ((uint64_t)(n)) % __base; \
> - (n) = ((uint64_t)(n)) / __base; \
> + u64 __base = (base); \
> + u64 __rem; \
> + __rem = ((u64)(n)) % __base; \
> + (n) = ((u64)(n)) / __base; \
> __rem; \
> })
> #elif BITS_PER_LONG == 32
> # define lov_do_div64(n, base) ({ \
> - uint64_t __rem; \
> + u64 __rem; \
> if ((sizeof(base) > 4) && (((base) & 0xffffffff00000000ULL) != 0)) { \
> int __remainder; \
> LASSERTF(!((base) & (LOV_MIN_STRIPE_SIZE - 1)), "64 bit lov " \
> - "division %llu / %llu\n", (n), (uint64_t)(base)); \
> + "division %llu / %llu\n", (n), (u64)(base)); \
> __remainder = (n) & (LOV_MIN_STRIPE_SIZE - 1); \
> (n) >>= LOV_MIN_STRIPE_BITS; \
> __rem = do_div(n, (base) >> LOV_MIN_STRIPE_BITS); \
> diff --git a/drivers/staging/lustre/lustre/osc/osc_internal.h b/drivers/staging/lustre/lustre/osc/osc_internal.h
> index feda61b..32db150 100644
> --- a/drivers/staging/lustre/lustre/osc/osc_internal.h
> +++ b/drivers/staging/lustre/lustre/osc/osc_internal.h
> @@ -168,9 +168,9 @@ struct osc_device {
>
> /* Write stats is actually protected by client_obd's lock. */
> struct osc_stats {
> - uint64_t os_lockless_writes; /* by bytes */
> - uint64_t os_lockless_reads; /* by bytes */
> - uint64_t os_lockless_truncates; /* by times */
> + u64 os_lockless_writes; /* by bytes */
> + u64 os_lockless_reads; /* by bytes */
> + u64 os_lockless_truncates; /* by times */
> } od_stats;
>
> /* configuration item(s) */
> --
> 2.7.4
>
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Cheers, Andreas
--
Andreas Dilger
Lustre Principal Architect
Intel Corporation
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