Commit 9c793854 authored by Yajun Deng's avatar Yajun Deng Committed by Andrew Morton
Browse files

mm/mmap: use SZ_{8K, 128K} helper macro 

Use SZ_{8K, 128K} helper macro instead of the number in init_user_reserve
and reserve_mem_notifier. This is more readable.

Link: https://lkml.kernel.org/r/20240131031913.2058597-1-yajun.deng@linux.dev


Signed-off-by: default avatarYajun Deng <yajun.deng@linux.dev>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 87beb004

mm/mmap.c

+4 −4
Original line number Diff line number Diff line
@@ -3845,7 +3845,7 @@ static int init_user_reserve(void) 


	free_kbytes = K(global_zone_page_state(NR_FREE_PAGES));



	sysctl_user_reserve_kbytes = min(free_kbytes / 32, 1UL << 17);

	sysctl_user_reserve_kbytes = min(free_kbytes / 32, SZ_128K);

	return 0;

}

subsys_initcall(init_user_reserve);
@@ -3866,7 +3866,7 @@ static int init_admin_reserve(void) 


	free_kbytes = K(global_zone_page_state(NR_FREE_PAGES));



	sysctl_admin_reserve_kbytes = min(free_kbytes / 32, 1UL << 13);

	sysctl_admin_reserve_kbytes = min(free_kbytes / 32, SZ_8K);

	return 0;

}

subsys_initcall(init_admin_reserve);
@@ -3898,12 +3898,12 @@ static int reserve_mem_notifier(struct notifier_block *nb, 
	case MEM_ONLINE:

		/* Default max is 128MB. Leave alone if modified by operator. */

		tmp = sysctl_user_reserve_kbytes;

		if (0 < tmp && tmp < (1UL << 17))

		if (tmp > 0 && tmp < SZ_128K)

			init_user_reserve();



		/* Default max is 8MB.  Leave alone if modified by operator. */

		tmp = sysctl_admin_reserve_kbytes;

		if (0 < tmp && tmp < (1UL << 13))

		if (tmp > 0 && tmp < SZ_8K)

			init_admin_reserve();



		break;