diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0003-Fix-libmctp-build-error.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0003-Fix-libmctp-build-error.patch | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0003-Fix-libmctp-build-error.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0003-Fix-libmctp-build-error.patch new file mode 100644 index 000000000..b9a6ca527 --- /dev/null +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0003-Fix-libmctp-build-error.patch @@ -0,0 +1,116 @@ +From af414e45bade3cf7277215d82b59a31c9b459cea Mon Sep 17 00:00:00 2001 +From: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +Date: Mon, 22 Feb 2021 15:27:22 -0800 +Subject: [PATCH] Fix libmctp build error + +This is a quick fix for libmctp building which includes staging +kernel headers. It's a temporary fix until kernel tree fixes the +rwonce.h including issue. + +Note: Do not upstream it. + +Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com> +--- + include/asm/rwonce.h | 90 ++++++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 90 insertions(+) + create mode 100644 include/asm/rwonce.h + +diff --git a/include/asm/rwonce.h b/include/asm/rwonce.h +new file mode 100644 +index 000000000000..11619bdbebae +--- /dev/null ++++ b/include/asm/rwonce.h +@@ -0,0 +1,90 @@ ++/* SPDX-License-Identifier: GPL-2.0 */ ++/* ++ * Prevent the compiler from merging or refetching reads or writes. The ++ * compiler is also forbidden from reordering successive instances of ++ * READ_ONCE and WRITE_ONCE, but only when the compiler is aware of some ++ * particular ordering. One way to make the compiler aware of ordering is to ++ * put the two invocations of READ_ONCE or WRITE_ONCE in different C ++ * statements. ++ * ++ * These two macros will also work on aggregate data types like structs or ++ * unions. ++ * ++ * Their two major use cases are: (1) Mediating communication between ++ * process-level code and irq/NMI handlers, all running on the same CPU, ++ * and (2) Ensuring that the compiler does not fold, spindle, or otherwise ++ * mutilate accesses that either do not require ordering or that interact ++ * with an explicit memory barrier or atomic instruction that provides the ++ * required ordering. ++ */ ++#ifndef __ASM_GENERIC_RWONCE_H ++#define __ASM_GENERIC_RWONCE_H ++ ++#ifndef __ASSEMBLY__ ++ ++#include <linux/compiler_types.h> ++#include <linux/kasan-checks.h> ++#include <linux/kcsan-checks.h> ++ ++/* ++ * Yes, this permits 64-bit accesses on 32-bit architectures. These will ++ * actually be atomic in some cases (namely Armv7 + LPAE), but for others we ++ * rely on the access being split into 2x32-bit accesses for a 32-bit quantity ++ * (e.g. a virtual address) and a strong prevailing wind. ++ */ ++#define compiletime_assert_rwonce_type(t) \ ++ compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \ ++ "Unsupported access size for {READ,WRITE}_ONCE().") ++ ++/* ++ * Use __READ_ONCE() instead of READ_ONCE() if you do not require any ++ * atomicity. Note that this may result in tears! ++ */ ++#ifndef __READ_ONCE ++#define __READ_ONCE(x) (*(const volatile __unqual_scalar_typeof(x) *)&(x)) ++#endif ++ ++#define READ_ONCE(x) \ ++({ \ ++ compiletime_assert_rwonce_type(x); \ ++ __READ_ONCE(x); \ ++}) ++ ++#define __WRITE_ONCE(x, val) \ ++do { \ ++ *(volatile typeof(x) *)&(x) = (val); \ ++} while (0) ++ ++#define WRITE_ONCE(x, val) \ ++do { \ ++ compiletime_assert_rwonce_type(x); \ ++ __WRITE_ONCE(x, val); \ ++} while (0) ++ ++static __always_inline ++unsigned long __read_once_word_nocheck(const void *addr) ++{ ++ return __READ_ONCE(*(unsigned long *)addr); ++} ++ ++/* ++ * Use READ_ONCE_NOCHECK() instead of READ_ONCE() if you need to load a ++ * word from memory atomically but without telling KASAN/KCSAN. This is ++ * usually used by unwinding code when walking the stack of a running process. ++ */ ++#define READ_ONCE_NOCHECK(x) \ ++({ \ ++ compiletime_assert(sizeof(x) == sizeof(unsigned long), \ ++ "Unsupported access size for READ_ONCE_NOCHECK()."); \ ++ (typeof(x))__read_once_word_nocheck(&(x)); \ ++}) ++ ++static __always_inline ++unsigned long read_word_at_a_time(const void *addr) ++{ ++ kasan_check_read(addr, 1); ++ return *(unsigned long *)addr; ++} ++ ++#endif /* __ASSEMBLY__ */ ++#endif /* __ASM_GENERIC_RWONCE_H */ +-- +2.17.1 + |