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AJvYcCX1yUzrWX+mA3e6ol1CaUmuGzn/e3Zd+UuqXcvEowJydlC5I6h+MYZ3v27GWlB2XAEgGHI5v2WT7aMhkPBGB3RFxBPwPWLll85AcT9l X-Gm-Message-State: AOJu0Yz05cW4BjE9hBTdUcXpHl4RTNzLV6OqkgNkZRLgjfac0QtsPcuc egQpQoD1+iCY6BzOntyTgJIIhpJ6laENDQuviVDl+ig6He21LGNE X-Received: by 2002:a17:902:7847:b0:1db:5213:222 with SMTP id e7-20020a170902784700b001db52130222mr6737543pln.5.1708178614392; Sat, 17 Feb 2024 06:03:34 -0800 (PST) Received: from localhost.localdomain ([49.142.40.215]) by smtp.gmail.com with ESMTPSA id h3-20020a170902748300b001dbcb39dd80sm1032713pll.183.2024.02.17.06.03.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Feb 2024 06:03:34 -0800 (PST) From: skseofh@gmail.com To: catalin.marinas@arm.com, will@kernel.org Cc: ryan.roberts@arm.com, mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Daero Lee Subject: [PATCH] arm64: add early fixmap initialization flag Date: Sat, 17 Feb 2024 23:03:26 +0900 Message-Id: <20240217140326.2367186-1-skseofh@gmail.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791155243549976773 X-GMAIL-MSGID: 1791155243549976773 From: Daero Lee early_fixmap_init may be called multiple times. Since there is no change in the page table after early fixmap initialization, an initialization flag was added. Signed-off-by: Daero Lee Reported-by: Daero Lee Signed-off-by: Mark Rutland Reviewed-by: Itaru Kitayama --- arch/arm64/mm/fixmap.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/mm/fixmap.c b/arch/arm64/mm/fixmap.c index c0a3301203bd..fbdd5f30f3a1 100644 --- a/arch/arm64/mm/fixmap.c +++ b/arch/arm64/mm/fixmap.c @@ -32,6 +32,8 @@ static pte_t bm_pte[NR_BM_PTE_TABLES][PTRS_PER_PTE] __page_aligned_bss; static pmd_t bm_pmd[PTRS_PER_PMD] __page_aligned_bss __maybe_unused; static pud_t bm_pud[PTRS_PER_PUD] __page_aligned_bss __maybe_unused; +static int early_fixmap_initialized __initdata; + static inline pte_t *fixmap_pte(unsigned long addr) { return &bm_pte[BM_PTE_TABLE_IDX(addr)][pte_index(addr)]; @@ -100,10 +102,15 @@ void __init early_fixmap_init(void) unsigned long addr = FIXADDR_TOT_START; unsigned long end = FIXADDR_TOP; + if (early_fixmap_initialized) + return; + pgd_t *pgdp = pgd_offset_k(addr); p4d_t *p4dp = p4d_offset(pgdp, addr); early_fixmap_init_pud(p4dp, addr, end); + + early_fixmap_initialized = 1; } /*