From c7e263ab45b95170fe7d4b818bab484268b7bba8 Mon Sep 17 00:00:00 2001 From: Lukas Czerner Date: Tue, 25 Jul 2023 16:45:04 +0200 Subject: [PATCH] shmem: make shmem_inode_acct_block() return error Make shmem_inode_acct_block() return proper error code instead of bool. This will be useful later when we introduce quota support. There should be no functional change. Signed-off-by: Lukas Czerner Signed-off-by: Carlos Maiolino Reviewed-by: Jan Kara Message-Id: <20230725144510.253763-2-cem@kernel.org> Signed-off-by: Christian Brauner --- mm/shmem.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index f5af4b9..be71cdc 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -199,13 +199,14 @@ static inline void shmem_unacct_blocks(unsigned long flags, long pages) vm_unacct_memory(pages * VM_ACCT(PAGE_SIZE)); } -static inline bool shmem_inode_acct_block(struct inode *inode, long pages) +static inline int shmem_inode_acct_block(struct inode *inode, long pages) { struct shmem_inode_info *info = SHMEM_I(inode); struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb); + int err = -ENOSPC; if (shmem_acct_block(info->flags, pages)) - return false; + return err; if (sbinfo->max_blocks) { if (percpu_counter_compare(&sbinfo->used_blocks, @@ -214,11 +215,11 @@ static inline bool shmem_inode_acct_block(struct inode *inode, long pages) percpu_counter_add(&sbinfo->used_blocks, pages); } - return true; + return 0; unacct: shmem_unacct_blocks(info->flags, pages); - return false; + return err; } static inline void shmem_inode_unacct_blocks(struct inode *inode, long pages) @@ -370,7 +371,7 @@ bool shmem_charge(struct inode *inode, long pages) struct shmem_inode_info *info = SHMEM_I(inode); unsigned long flags; - if (!shmem_inode_acct_block(inode, pages)) + if (shmem_inode_acct_block(inode, pages)) return false; /* nrpages adjustment first, then shmem_recalc_inode() when balanced */ @@ -1588,13 +1589,14 @@ static struct folio *shmem_alloc_and_acct_folio(gfp_t gfp, struct inode *inode, struct shmem_inode_info *info = SHMEM_I(inode); struct folio *folio; int nr; - int err = -ENOSPC; + int err; if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) huge = false; nr = huge ? HPAGE_PMD_NR : 1; - if (!shmem_inode_acct_block(inode, nr)) + err = shmem_inode_acct_block(inode, nr); + if (err) goto failed; if (huge) @@ -2445,7 +2447,7 @@ int shmem_mfill_atomic_pte(pmd_t *dst_pmd, int ret; pgoff_t max_off; - if (!shmem_inode_acct_block(inode, 1)) { + if (shmem_inode_acct_block(inode, 1)) { /* * We may have got a page, returned -ENOENT triggering a retry, * and now we find ourselves with -ENOMEM. Release the page, to -- 2.7.4