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Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Pedro Falcato , Peter Xu Subject: [PATCH v1 08/11] x86/mm/pat: remove strict_prot parameter from reserve_pfn_range() Date: Fri, 25 Apr 2025 10:17:12 +0200 Message-ID: <20250425081715.1341199-9-david@redhat.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250425081715.1341199-1-david@redhat.com> References: <20250425081715.1341199-1-david@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: KRRuqqetQgHCSMkCcSf0Ih9daqxACf0K3JoUVsYioAA_1745569056 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 68C7E80010 X-Stat-Signature: hsctgefbihigqxz9khx8nd9x8exr6yfe X-HE-Tag: 1745569060-223601 X-HE-Meta: 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 eH89Cyi7 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Always set to 0, so let's remove it. Signed-off-by: David Hildenbrand --- arch/x86/mm/pat/memtype.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/arch/x86/mm/pat/memtype.c b/arch/x86/mm/pat/memtype.c index 668ebf0065157..57e3ced4c28cb 100644 --- a/arch/x86/mm/pat/memtype.c +++ b/arch/x86/mm/pat/memtype.c @@ -858,8 +858,7 @@ int memtype_kernel_map_sync(u64 base, unsigned long size, * Reserved non RAM regions only and after successful memtype_reserve, * this func also keeps identity mapping (if any) in sync with this new prot. */ -static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, - int strict_prot) +static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot) { int is_ram = 0; int ret; @@ -895,8 +894,7 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, return ret; if (pcm != want_pcm) { - if (strict_prot || - !is_new_memtype_allowed(paddr, size, want_pcm, pcm)) { + if (!is_new_memtype_allowed(paddr, size, want_pcm, pcm)) { memtype_free(paddr, paddr + size); pr_err("x86/PAT: %s:%d map pfn expected mapping type %s for [mem %#010Lx-%#010Lx], got %s\n", current->comm, current->pid, @@ -906,10 +904,6 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, cattr_name(pcm)); return -EINVAL; } - /* - * We allow returning different type than the one requested in - * non strict case. - */ pgprot_set_cachemode(vma_prot, pcm); } @@ -959,7 +953,7 @@ int pfnmap_track(unsigned long pfn, unsigned long size, pgprot_t *prot) { const resource_size_t paddr = (resource_size_t)pfn << PAGE_SHIFT; - return reserve_pfn_range(paddr, size, prot, 0); + return reserve_pfn_range(paddr, size, prot); } void pfnmap_untrack(unsigned long pfn, unsigned long size) -- 2.49.0