[PATCH v2 05/16] arm64: Remove uaccess toggle from __flush_cache_range macro
From: Fuad Tabba <hidden>
Date: 2021-05-17 07:59:15
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
The uaccess toggle isn't part of the cache maintenance operation. Move it directly to where it's needed. No functional change intended. Signed-off-by: Fuad Tabba <redacted> --- arch/arm64/mm/cache.S | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/mm/cache.S b/arch/arm64/mm/cache.S
index 6babaaf34f17..d74b20cd6449 100644
--- a/arch/arm64/mm/cache.S
+++ b/arch/arm64/mm/cache.S@@ -26,9 +26,6 @@ * - needs_uaccess - (macro parameter) might access user space memory */ .macro __flush_cache_range, needs_uaccess - .if \needs_uaccess - uaccess_ttbr0_enable x2, x3, x4 - .endif alternative_if ARM64_HAS_CACHE_IDC dsb ishst b 7f
@@ -55,9 +52,6 @@ alternative_else_nop_endif invalidate_icache_by_line x0, x1, x2, x3, \needs_uaccess, 9f 8: mov x0, #0 1: - .if \needs_uaccess - uaccess_ttbr0_disable x1, x2 - .endif ret .if \needs_uaccess
@@ -92,7 +86,9 @@ SYM_FUNC_END(__flush_icache_range) * - end - virtual end address of region */ SYM_FUNC_START(__flush_cache_user_range) + uaccess_ttbr0_enable x2, x3, x4 __flush_cache_range needs_uaccess=1 + uaccess_ttbr0_disable x1, x2 SYM_FUNC_END(__flush_cache_user_range) /*
--
2.31.1.751.gd2f1c929bd-goog
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