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Commit e9b4db2b authored by Wanpeng Li's avatar Wanpeng Li Committed by Pekka Enberg
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mm/slab: Fix /proc/slabinfo unwriteable for slab 



Slab have some tunables like limit, batchcount, and sharedfactor can be
tuned through function slabinfo_write. Commit (b7454ad3: mm/sl[au]b: Move
slabinfo processing to slab_common.c) uncorrectly change /proc/slabinfo
unwriteable for slab, this patch fix it by revert to original mode.

Acked-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarWanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent e25839f6

mm/slab_common.c

+9 −1
Original line number Diff line number Diff line
@@ -495,6 +495,13 @@ void __init create_kmalloc_caches(unsigned long flags) 




#ifdef CONFIG_SLABINFO



#ifdef CONFIG_SLAB

#define SLABINFO_RIGHTS (S_IWUSR | S_IRUSR)

#else

#define SLABINFO_RIGHTS S_IRUSR

#endif



void print_slabinfo_header(struct seq_file *m)

{

	/*
@@ -631,7 +638,8 @@ static const struct file_operations proc_slabinfo_operations = { 


static int __init slab_proc_init(void)

{

	proc_create("slabinfo", S_IRUSR, NULL, &proc_slabinfo_operations);

	proc_create("slabinfo", SLABINFO_RIGHTS, NULL,

						&proc_slabinfo_operations);

	return 0;

}

module_init(slab_proc_init);