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Fri, 24 Mar 2017 09:18:57 +0000 (GMT) From: Marek Szyprowski To: iommu@lists.linux-foundation.org, linux-samsung-soc@vger.kernel.org Cc: Marek Szyprowski , Joerg Roedel , Krzysztof Kozlowski , Andrzej Hajda , Bartlomiej Zolnierkiewicz Subject: [PATCH] iommu/exynos: Don't open-code loop unrolling Date: Fri, 24 Mar 2017 10:18:44 +0100 Message-id: <1490347124-17937-1-git-send-email-m.szyprowski@samsung.com> X-Mailer: git-send-email 1.9.1 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrNIsWRmVeSWpSXmKPExsWy7djP87qNT65EGDydqmtxa905VouNM9az WizYb23ROXsDu8X580Bixvl9TBZrj9xld2D3eHJwHpPHplWdbB6Tbyxn9OjbsorR4/MmuQDW KC6blNSczLLUIn27BK6Mab/nMRe0c1U83T+FqYFxJUcXIyeHhICJxNV9j1khbDGJC/fWs3Ux cnEICSxllJj0tpEdwvnMKPF1z1UmmI6Pe1YwQySWMUpsvbyVEcJpYJJ40HGXEaSKTcBQoutt FxuILSLgLnH9z3MWkCJmgatAHW87WUASwgK2Eq0/pzKD2CwCqhKPv90AinNw8Ap4SNxYzAyx TU7i5LHJrCC9EgK32STe3tzGBFIjISArsekAVI2LxLVj76BsYYlXx7ewQ9gyEp0dB6Gu7meU aGrVhrBnMEqce8sLYVtLHD5+Eex/ZgE+iUnbpjNDjOeV6GgTgijxkGhff4MFwnaU2HCvAexF IYFYie2zdzFOYJRewMiwilEktbQ4Nz212ESvODG3uDQvXS85P3cTIzBKT/87/mUH4+JjVocY BTgYlXh4N9RdihBiTSwrrsw9xCjBwawkwiu64kqEEG9KYmVValF+fFFpTmrxIUZpDhYlcd49 C66ECwmkJ5akZqemFqQWwWSZODilGhhn6m4zNu1P+lIZESW33XgGQx93+nWnaN+Z55vWH5nD osmjdWn2Uy6hPcz3Ls3TYWzIlvc7x/7Nbt78mi3hAbEp2eqFj5wPiB+9Ym5afXbFi/+u8zVD rJfN3RjUUbBfTrLoet1p+TX3czKkd5s9lVrmfbB2gZt16efFgXPd26Q+OKwNXTkxz0KJpTgj 0VCLuag4EQDU7koOzgIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrALMWRmVeSWpSXmKPExsVy+t/xq7rvnlyJMHi0jMvi1rpzrBYbZ6xn tViw39qic/YGdovz54HEjPP7mCzWHrnL7sDu8eTgPCaPTas62Twm31jO6NG3ZRWjx+dNcgGs UW42GamJKalFCql5yfkpmXnptkqhIW66FkoKeYm5qbZKEbq+IUFKCmWJOaVAnpEBGnBwDnAP VtK3S3DLmPZ7HnNBO1fF0/1TmBoYV3J0MXJySAiYSHzcs4IZwhaTuHBvPVsXIxeHkMASRonL nw6zQjhNTBLvFr1mBKliEzCU6HrbxQZiiwi4S1z/85wFpIhZ4DqjxMmH+1hBEsICthKtP6eC jWURUJV4/O0GUBEHB6+Ah8SNxVDb5CROHpvMOoGRewEjwypGkdTS4tz03GJDveLE3OLSvHS9 5PzcTYzA0Nx27OfmHYyXNgYfYhTgYFTi4Y2ouRQhxJpYVlyZe4hRgoNZSYRXdMWVCCHelMTK qtSi/Pii0pzU4kOMpkC7JzJLiSbnA+MmryTe0MTQ3NLQyNjCwtzISEmct+TDlXAhgfTEktTs 1NSC1CKYPiYOTqkGxszj87LfvJqhOvPcibkau2/PeSlyufDHYsOdV9xPPvVdV7U+ndmSgYmh dOmb5rPCB50uLZRbEzBP/fCLXOm1rxeazIvoZvCW2Par48ishVKfLKWCWKVX+R78G1sfkZfw 9Pzp2fdkOTnWOit1PF3xvumafET5Zp9s2Uwpt6AnlzYWhTILL2ZN8VFiKc5INNRiLipOBAA2 wbcZYwIAAA== X-MTR: 20000000000000000@CPGS X-CMS-MailID: 20170324091857eucas1p1e7980473922826b7dba5f043be168e6a X-Msg-Generator: CA X-Sender-IP: 182.198.249.179 X-Local-Sender: =?utf-8?q?Marek_Szyprowski=1BSRPOL-Kernel_=28TP=29=1B?= =?utf-8?b?7IK87ISx7KCE7J6QG1NlbmlvciBTb2Z0d2FyZSBFbmdpbmVlcg==?= X-Global-Sender: =?utf-8?q?Marek_Szyprowski=1BSRPOL-Kernel_=28TP=29=1BSam?= =?utf-8?q?sung_Electronics=1BSenior_Software_Engineer?= X-Sender-Code: =?utf-8?q?C10=1BEHQ=1BC10CD02CD027392?= CMS-TYPE: 201P X-HopCount: 7 X-CMS-RootMailID: 20170324091857eucas1p1e7980473922826b7dba5f043be168e6a X-RootMTR: 20170324091857eucas1p1e7980473922826b7dba5f043be168e6a References: Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org IOMMU domain allocation is not performance critical operation, so remove hand made optimisation of unrolled initialization loop and leave this to the compiler. Signed-off-by: Marek Szyprowski --- drivers/iommu/exynos-iommu.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 48b5dabd06ce..2395478dde75 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -759,16 +759,8 @@ static struct iommu_domain *exynos_iommu_domain_alloc(unsigned type) goto err_counter; /* Workaround for System MMU v3.3 to prevent caching 1MiB mapping */ - for (i = 0; i < NUM_LV1ENTRIES; i += 8) { - domain->pgtable[i + 0] = ZERO_LV2LINK; - domain->pgtable[i + 1] = ZERO_LV2LINK; - domain->pgtable[i + 2] = ZERO_LV2LINK; - domain->pgtable[i + 3] = ZERO_LV2LINK; - domain->pgtable[i + 4] = ZERO_LV2LINK; - domain->pgtable[i + 5] = ZERO_LV2LINK; - domain->pgtable[i + 6] = ZERO_LV2LINK; - domain->pgtable[i + 7] = ZERO_LV2LINK; - } + for (i = 0; i < NUM_LV1ENTRIES; i++) + domain->pgtable[i] = ZERO_LV2LINK; handle = dma_map_single(dma_dev, domain->pgtable, LV1TABLE_SIZE, DMA_TO_DEVICE);