I've cherry-picked the upstream fix as a patch in the gspr/bug-959364 branch of https://salsa.debian.org/gspr/acpi-call.git. It fixes the problem for me.
A pull request for the maintainer follows. *** The following changes since commit 8474a4b865725bedc46a1be0b30dbc2a6b2df84c: Update changelog for 1.1.0-5 release (2019-05-31 17:34:38 +0200) are available in the Git repository at: https://salsa.debian.org/gspr/acpi-call.git 625bdbfb2133f29c1c37ab775551e2f106459017 for you to fetch changes up to 625bdbfb2133f29c1c37ab775551e2f106459017: Add patch 0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch (2020-05-05 09:26:30 +0200) ---------------------------------------------------------------- Gard Spreemann (1): Add patch 0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch .../0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch | 31 +++++++++++++++++++++++++++++++ debian/patches/series | 1 + 2 files changed, 32 insertions(+) create mode 100644 debian/patches/0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch diff --git a/debian/patches/0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch b/debian/patches/0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch new file mode 100644 index 0000000..d2fdee3 --- /dev/null +++ b/debian/patches/0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch @@ -0,0 +1,31 @@ +From: Nikita Knutov <m...@nikitosi.us> +Date: Thu, 9 Apr 2020 09:45:40 +0300 +Subject: fix for 5.6+ kernels. file_operations dtype is changed + +--- + acpi_call.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +diff --git a/acpi_call.c b/acpi_call.c +index 7f2adb8..3574a44 100644 +--- a/acpi_call.c ++++ b/acpi_call.c +@@ -318,11 +318,18 @@ static ssize_t acpi_proc_read( struct file *filp, char __user *buff, + return ret; + } + ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 6, 0) ++static struct proc_ops proc_acpi_operations = { ++ .proc_read = acpi_proc_read, ++ .proc_write = acpi_proc_write, ++}; ++#else + static struct file_operations proc_acpi_operations = { + .owner = THIS_MODULE, + .read = acpi_proc_read, + .write = acpi_proc_write, + }; ++#endif + + #else + static int acpi_proc_read(char *page, char **start, off_t off, diff --git a/debian/patches/series b/debian/patches/series index a8b7e9f..93663bb 100644 --- a/debian/patches/series +++ b/debian/patches/series @@ -1,3 +1,4 @@ 0003-Fix-memory-leak-on-args.patch 0001-Fix-compatibility-with-Linux-3.17.patch 0002-Fix-build-4.12-copy-from-user.patch +0004-fix-for-5.6-kernels.-file_operations-dtype-is-change.patch
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