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* hwspinlock: sirf: Remove the redundant 'of_match_ptr'Baolin Wang2020-12-101-1/+1
| | | | | | | | | | | | | | Remove the the redundant 'of_match_ptr' macro to fix below warning when the CONFIG_OF is not selected. All warnings: drivers/hwspinlock/sirf_hwspinlock.c:87:34: warning: unused variable 'sirf_hwpinlock_ids' [-Wunused-const-variable] Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/250d35cb489c3c4c066f7ce256d27f36712a1979.1591618255.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: fixed warning of unused variable 'sprd_hwspinlock_of_match'Chunyan Zhang2020-11-181-1/+1
| | | | | | | | | | | | The macro function of_match_ptr() is NULL if CONFIG_OF is not set, in this case Clang compiler would complain the of_device_id variable is unused. Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Reported-by: kernel test robot <lkp@intel.com> Fixes: d8c8bbbb1aba ("hwspinlock: sprd: Add hardware spinlock driver") Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Link: https://lore.kernel.org/r/20201112070410.14810-1-zhang.lyra@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: use module_platform_driver() instead postcore initcallChunyan Zhang2020-11-031-12/+1
| | | | | | | | | | The hardware spinlock devices are defined in the DT, there's no need for init calls order, remove boilerplate code by using module_platform_driver. Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com> Link: https://lore.kernel.org/r/20201030034654.15775-3-zhang.lyra@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: Remove redundant header filesBaolin Wang2020-10-261-2/+0
| | | | | | | | Remove redundant header files. Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Link: https://lore.kernel.org/r/1590991552-93643-1-git-send-email-baolin.wang@linux.alibaba.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: qcom: Allow mmio usage in addition to sysconBjorn Andersson2020-07-141-16/+54
| | | | | | | | | | | | | | | | In modern Qualcomm platforms the mutex region of the TCSR is forked off into its own block, all with a offset of 0 and stride of 4096, and in some of these platforms no other registers in this region is accessed from Linux. So add support for directly memory mapping this register space, to avoid the need to represent this block using a syscon. Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Reviewed-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20200622075956.171058-4-bjorn.andersson@linaro.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Simplify KconfigEzequiel Garcia2020-06-211-6/+4
| | | | | | | | | | | Every hwspinlock driver is expected to depend on the hwspinlock core, so it's possible to simplify the Kconfig, factoring out the HWSPINLOCK dependency. Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Link: https://lore.kernel.org/r/20200414220943.6203-1-ezequiel@collabora.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: hwspinlock_internal.h: Replace zero-length array with ↵Gustavo A. R. Silva2020-03-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | flexible-array member The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1][2], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being inadvertently introduced[3] to the codebase from now on. Also, notice that, dynamic memory allocations won't be affected by this change: "Flexible array members have incomplete type, and so the sizeof operator may not be applied. As a quirk of the original implementation of zero-length arrays, sizeof evaluates to zero."[1] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://github.com/KSPP/linux/issues/21 [3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Link: https://lore.kernel.org/r/20200319213839.GA10669@embeddedor.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Allow drivers to be built with COMPILE_TESTBaolin Wang2020-03-261-6/+6
| | | | | | | | Allow drivers to be built with COMPILE_TEST. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/5a95c3de07ef020a4e2f2776fa5adb00637ee387.1581324976.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sirf: Use devm_hwspin_lock_register() to register hwlock controllerBaolin Wang2020-01-221-18/+3
| | | | | | | | | Use devm_hwspin_lock_register() to register the hwlock controller instead of unregistering the hwlock controller explicitly when removing the device. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/8f94e67b5f9af20a93418a2fc9cc71b194f1285c.1578453662.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sirf: Remove redundant PM runtime functionsBaolin Wang2020-01-221-18/+4
| | | | | | | | | | Since the hwspinlock core has changed the PM runtime to be optional, and the SIRF hardware spinlock has no pm runtime requirement, thus remove these redundant PM runtime functions. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/c921e391aa2a652d8d6ae0e4041202cec9d917e7.1578453662.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sirf: Change to use devm_platform_ioremap_resource()Baolin Wang2020-01-221-6/+3
| | | | | | | | | Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/dfa043f317c609a6172468ac11598968dd751bce.1578453662.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: omap: Use devm_kzalloc() to allocate memoryBaolin Wang2020-01-221-5/+3
| | | | | | | | | Use devm_kzalloc() to allocate memory, which can simplify the error handling. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/c066ad704c1a5fd52c3002cac80ddd59b3901b01.1578453062.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: omap: Change to use devm_platform_ioremap_resource()Baolin Wang2020-01-221-16/+8
| | | | | | | | | | | Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Meanwhile renaming the error label to make more sense after removing iounmap(). Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/6c09c5034a7e68fdfc22d2cb5daa375bccb33a66.1578453062.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: qcom: Use devm_hwspin_lock_register() to register hwlock controllerBaolin Wang2020-01-221-17/+2
| | | | | | | | | Use devm_hwspin_lock_register() to register the hwlock controller instead of unregistering the hwlock controller explicitly when removing the device. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/d69ad8611a68b0cac3c927d19901f3c113c5435c.1578452735.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: qcom: Remove redundant PM runtime functionsBaolin Wang2020-01-221-11/+2
| | | | | | | | | | Since the hwspinlock core has changed the PM runtime to be optional, and the Qualcomm hardware spinlock has no pm runtime requirement, thus remove these redundant PM runtime functions. Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/e0bb751feb7af709f92e52a07d0e8ebcf1ee44ff.1578452735.git.baolin.wang7@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: stm32: convert to devm_platform_ioremap_resourceYangtao Li2019-12-291-3/+1
| | | | | | | | Use devm_platform_ioremap_resource() to simplify code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Link: https://lore.kernel.org/r/20191228191541.26999-1-tiny.windzz@gmail.com Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: u8500_hsem: Remove redundant PM runtime implementationBaolin Wang2019-11-091-15/+4
| | | | | | | | | Since the hwspinlock core has changed the PM runtime to be optional, thus remove the redundant PM runtime implementation in the u8500 HWSEM driver. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: Remove redundant PM runtime implementationBaolin Wang2019-11-091-18/+3
| | | | | | | | | Since the hwspinlock core has changed the PM runtime to be optional, thus remove the redundant PM runtime implementation in the Spreadtrum hwlock driver. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Let the PM runtime can be optionalBaolin Wang2019-11-091-4/+4
| | | | | | | | | | | | | | Now some hwspinlock controllers did not have the requirement to implement the PM runtime, but drivers must enable the PM runtime to comply with the hwspinlock core. Thus we can change the PM runtime support to be optional by validating the -EACCES error number which means the PM runtime is not enabled, and removing the return value validating of pm_runtime_put(). So that we can remove some redundant PM runtime code in drivers. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Remove BUG_ON() from the hwspinlock coreBaolin Wang2019-11-091-4/+4
| | | | | | | | | | The original code use BUG_ON() to validate the parameters when locking or unlocking one hardware lock, but we should not crash the whole kernel though the hwlock parameters are incorrect, instead we can return the error number for users and give some warning. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: Use devm_hwspin_lock_register() to register hwlock controllerBaolin Wang2019-10-051-5/+3
| | | | | | | | Use devm_hwspin_lock_register() to register the hwlock controller instead of unregistering the hwlock controller explicitly when removing the device. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: Use devm_add_action_or_reset() for calls to ↵Baolin Wang2019-10-051-2/+15
| | | | | | | | | | clk_disable_unprepare() Use devm_add_action_or_reset() for calls to clk_disable_unprepare(), which can simplify the error handling. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: Check the return value of clk_prepare_enable()Baolin Wang2019-10-051-1/+3
| | | | | | | | | We must check the return value of clk_prepare_enable() to make sure the hardware spinlock controller can be enabled successfully, otherwise we should return error. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: sprd: Change to use devm_platform_ioremap_resource()Baolin Wang2019-10-051-3/+1
| | | | | | | | Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: u8500_hsem: Use devm_hwspin_lock_register() to register hwlock ↵Baolin Wang2019-10-051-9/+2
| | | | | | | | | | | controller Use devm_hwspin_lock_register() to register the hwlock controller instead of unregistering the hwlock controller explicitly when removing the device. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: u8500_hsem: Use devm_kzalloc() to allocate memoryBaolin Wang2019-10-051-9/+6
| | | | | | | | Use devm_kzalloc() to allocate memory. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: u8500_hsem: Change to use devm_platform_ioremap_resource()Baolin Wang2019-10-051-15/+5
| | | | | | | | | Use the new helper that wraps the calls to platform_get_resource() and devm_ioremap_resource() together, which can simpify the code. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: add the 'in_atomic' APIFabien Dessenne2019-06-301-13/+30
| | | | | | | | | | | Add the 'in_atomic' mode which can be called from an atomic context. This mode relies on the existing 'raw' mode (no lock, no preemption/irq disabling) with the difference that the timeout is not based on jiffies (jiffies won't increase when irq are disabled) but handled with busy-waiting udelay() calls. Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: stm32: implement the relax() opsFabien Dessenne2019-06-301-0/+7
| | | | | | | | | Implement this optional ops, called by hwspinlock core while spinning on a lock, between two successive invocations of trylock(). Reviewed-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: ignore disabled deviceFabien Dessenne2019-06-291-0/+5
| | | | | | | | | Do not wait for hwspinlock device registration if it is not available for use. Acked-by: Suman Anna <s-anna@ti.com> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock/omap: Add a trace during probeSuman Anna2019-06-291-0/+3
| | | | | | | | | Add a debug level trace statement in the OMAP HwSpinlock driver probe function to print the number of hwlocks on a successful registration. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock/omap: Add support for TI K3 SoCsSuman Anna2019-06-292-1/+2
| | | | | | | | | | | A HwSpinlock IP is also present on the newer TI K3 AM65x and J721E family of SoCs within the Main NavSS sub-module. Reuse the existing OMAP Hwspinlock driver to extend the support for this IP on K3 AM65x SoCs as well. The IP has slightly different bit-fields in the SYSCONFIG and SYSSTATUS registers. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: fix return value check in stm32_hwspinlock_probe()Wei Yongjun2019-01-031-2/+2
| | | | | | | | | | | In case of error, the function devm_ioremap_resource() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Fixes: f24fcff1d267 ("hwspinlock: add STM32 hwspinlock device") Acked-by: Benjamin Gaignard <benjamin.gaignard@gmail.com> Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: add STM32 hwspinlock deviceBenjamin Gaignard2018-12-053-0/+166
| | | | | | | | | This patch adds support of hardware semaphores for stm32mp1 SoC. The hardware block provides 32 semaphores. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Fix incorrect return pointersBaolin Wang2018-07-311-4/+4
| | | | | | | | | | | The commit 4f1acd758b08 ("hwspinlock: Add devm_xxx() APIs to request/free hwlock") introduces one bug, that will return one error pointer if failed to request one hwlock, but we expect NULL pointer on error for consumers. This patch will fix this issue. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Fix one comment mistakeBaolin Wang2018-06-261-1/+1
| | | | | | | Fix one comment mistake with correct function names. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Add devm_xxx() APIs to register/unregister one hwlock controllerBaolin Wang2018-06-261-0/+82
| | | | | | | | | This patch introduces devm_hwspin_lock_register() and devm_hwspin_lock_unregister() interfaces to help to register or unregister one hardware spinlock controller, that will help to simplify the cleanup code for hwspinlock drivers. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Add devm_xxx() APIs to request/free hwlockBaolin Wang2018-06-261-0/+110
| | | | | | | | | | This patch introduces some devm_xxx() APIs to help to request or free the hwlocks, which will help to simplify the cleanup code for drivers requesting one hwlock, ensuring that the hwlock is automatically freed whenever the device is unbound. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* hwspinlock: Add one new API to support getting a specific hwlock by the nameBaolin Wang2018-06-261-0/+29
| | | | | | | | | | The hardware spinlock binding already supplied the 'hwlock-names' property to match and get a specific hwlock, but did not supply one API for users to get a specific hwlock by the hwlock name. So this patch introduces one API to support this requirement. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* Merge tag 'hwlock-v4.18' of git://github.com/andersson/remoteprocLinus Torvalds2018-06-118-72/+59
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull hwspinlock updates from Bjorn Andersson: "In addition to migrating the files to use SPDX license headers this introduces the ability for clients to operate a hwlock without the framework taking any additional locks" * tag 'hwlock-v4.18' of git://github.com/andersson/remoteproc: hwspinlock/u8500: Switch to SPDX license identifier hwspinlock: sprd: Switch to SPDX license identifier hwspinlock/sirf: Switch to SPDX license identifier hwspinlock: qcom: Switch to SPDX license identifier hwspinlock/omap: Switch to SPDX license identifier hwspinlock/core: Switch to SPDX license identifier hwspinlock: Introduce one new mode for hwspinlock hwspinlock: Convert to use 'switch' statement
| * hwspinlock/u8500: Switch to SPDX license identifierSuman Anna2018-05-241-9/+1
| | | | | | | | | | | | | | | | | | | | Use the appropriate SPDX license identifier in the U8500 HWSEM driver source file and drop the previous boilerplate license text. Cc: Mathieu J. Poirier <mathieu.poirier@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * hwspinlock: sprd: Switch to SPDX license identifierSuman Anna2018-05-241-9/+1
| | | | | | | | | | | | | | | | | | Use the appropriate SPDX license identifiers in the Spreadtrum hardware spinlock driver source file and drop the previous boilerplate license text. Cc: Baolin Wang <baolin.wang@spreadtrum.com> Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * hwspinlock/sirf: Switch to SPDX license identifierSuman Anna2018-05-241-2/+1
| | | | | | | | | | | | | | | | | | | | Use the appropriate SPDX license identifier in the CSR's SIRF hardware spinlock driver source file and drop the previous boilerplate license text. Cc: Wei Chen <wei.chen@csr.com> Cc: Barry Song <baohua@kernel.org> Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * hwspinlock: qcom: Switch to SPDX license identifierSuman Anna2018-05-241-9/+1
| | | | | | | | | | | | | | | | Use the appropriate SPDX license identifier in the Qualcomm Hwspinlock driver source file and drop the previous boilerplate license text. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * hwspinlock/omap: Switch to SPDX license identifierSuman Anna2018-05-241-9/+1
| | | | | | | | | | | | | | | | Use the appropriate SPDX license identifier in the OMAP hwspinlock driver source file and drop the previous boilerplate license text. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * hwspinlock/core: Switch to SPDX license identifierSuman Anna2018-05-243-18/+3
| | | | | | | | | | | | | | | | Use the appropriate SPDX license identifier in the Hwspinlock core driver source files and drop the previous boilerplate license text. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * hwspinlock: Introduce one new mode for hwspinlockBaolin Wang2018-04-171-7/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In some scenarios, user need do some time-consuming or sleepable operations under the hardware spinlock protection for synchronization between the multiple subsystems. For example, there is one PMIC efuse on Spreadtrum platform, which need to be accessed under one hardware lock. But during the hardware lock protection, the efuse operation is time-consuming to almost 5 ms, so we can not disable the interrupts or preemption so long in this case. Thus we can introduce one new mode to indicate that we just acquire the hardware lock and do not disable interrupts or preemption, meanwhile we should force user to protect the hardware lock with mutex or spinlock to avoid dead-lock. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
| * hwspinlock: Convert to use 'switch' statementBaolin Wang2018-04-171-9/+24
| | | | | | | | | | | | | | | | | | We have different hwspinlock modes to select, thus it will be more readable to handle different modes with using 'switch' statement instead of 'if' statement. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* | treewide: Use struct_size() for devm_kmalloc() and friendsKees Cook2018-06-061-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replaces open-coded struct size calculations with struct_size() for devm_*, f2fs_*, and sock_* allocations. Automatically generated (and manually adjusted) from the following Coccinelle script: // Direct reference to struct field. @@ identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc"; expression HANDLE; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP) + alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP) // mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL); @@ identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc"; expression HANDLE; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(HANDLE, sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP) + alloc(HANDLE, struct_size(VAR, ELEMENT, COUNT), GFP) // Same pattern, but can't trivially locate the trailing element name, // or variable name. @@ identifier alloc =~ "devm_kmalloc|devm_kzalloc|sock_kmalloc|f2fs_kmalloc|f2fs_kzalloc"; expression HANDLE; expression GFP; expression SOMETHING, COUNT, ELEMENT; @@ - alloc(HANDLE, sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP) + alloc(HANDLE, CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP) Signed-off-by: Kees Cook <keescook@chromium.org>
* | treewide: Use struct_size() for kmalloc()-familyKees Cook2018-06-062-2/+2
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; void *entry[]; }; instance = kmalloc(sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL); This patch makes the changes for kmalloc()-family (and kvmalloc()-family) uses. It was done via automatic conversion with manual review for the "CHECKME" non-standard cases noted below, using the following Coccinelle script: // pkey_cache = kmalloc(sizeof *pkey_cache + tprops->pkey_tbl_len * // sizeof *pkey_cache->table, GFP_KERNEL); @@ identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc"; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(sizeof(*VAR) + COUNT * sizeof(*VAR->ELEMENT), GFP) + alloc(struct_size(VAR, ELEMENT, COUNT), GFP) // mr = kzalloc(sizeof(*mr) + m * sizeof(mr->map[0]), GFP_KERNEL); @@ identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc"; expression GFP; identifier VAR, ELEMENT; expression COUNT; @@ - alloc(sizeof(*VAR) + COUNT * sizeof(VAR->ELEMENT[0]), GFP) + alloc(struct_size(VAR, ELEMENT, COUNT), GFP) // Same pattern, but can't trivially locate the trailing element name, // or variable name. @@ identifier alloc =~ "kmalloc|kzalloc|kvmalloc|kvzalloc"; expression GFP; expression SOMETHING, COUNT, ELEMENT; @@ - alloc(sizeof(SOMETHING) + COUNT * sizeof(ELEMENT), GFP) + alloc(CHECKME_struct_size(&SOMETHING, ELEMENT, COUNT), GFP) Signed-off-by: Kees Cook <keescook@chromium.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 01:39:32 +0100