[PATCH 1081/1285] Replace numeric parameter like 0444 with macro

[PATCH 1081/1285] Replace numeric parameter like 0444 with macro

[Baole Ni]

I find that the developers often just specified the numeric value
when calling a macro which is defined with a parameter for access permission.
As we know, these numeric value for access permission have had the corresponding macro,
and that using macro can improve the robustness and readability of the code,
thus, I suggest replacing the numeric parameter with the macro.

Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com>
Signed-off-by: Baole Ni <baolex.ni@intel.com>
---
 mm/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index de2c176..fad009c 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -67,7 +67,7 @@ int mmap_rnd_compat_bits __read_mostly = CONFIG_ARCH_MMAP_RND_COMPAT_BITS;
 #endif
 
 static bool ignore_rlimit_data;
-core_param(ignore_rlimit_data, ignore_rlimit_data, bool, 0644);
+core_param(ignore_rlimit_data, ignore_rlimit_data, bool, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
 
 static void unmap_region(struct mm_struct *mm,
 		struct vm_area_struct *vma, struct vm_area_struct *prev,
-- 
2.9.2

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Re: [PATCH 1081/1285] Replace numeric parameter like 0444 with macro

[Steven Rostedt]

On Tue,  2 Aug 2016 20:14:43 +0800
Baole Ni <baolex.ni@intel.com> wrote:

> I find that the developers often just specified the numeric value
> when calling a macro which is defined with a parameter for access permission.
> As we know, these numeric value for access permission have had the corresponding macro,
> and that using macro can improve the robustness and readability of the code,
> thus, I suggest replacing the numeric parameter with the macro.
> 

NACK!

I find 0444 more readable than S_IRUSR | S_IRGRP | S_IROTH.

-- Steve

> Signed-off-by: Chuansheng Liu <chuansheng.liu@intel.com>
> Signed-off-by: Baole Ni <baolex.ni@intel.com>
> ---
>  mm/mmap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/mmap.c b/mm/mmap.c
> index de2c176..fad009c 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -67,7 +67,7 @@ int mmap_rnd_compat_bits __read_mostly = CONFIG_ARCH_MMAP_RND_COMPAT_BITS;
>  #endif
>  
>  static bool ignore_rlimit_data;
> -core_param(ignore_rlimit_data, ignore_rlimit_data, bool, 0644);
> +core_param(ignore_rlimit_data, ignore_rlimit_data, bool, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
>  
>  static void unmap_region(struct mm_struct *mm,
>  		struct vm_area_struct *vma, struct vm_area_struct *prev,

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