[RFC PATCH 3/5] livepatch: ftrace: arm64: Add support for -mfentry on arm64

This patch depends on the compiler's mfentry feature for arm64 that proposed by this patchset. If the kernel is compiled with this feature, the entry of each function like: foo: mov x9, x30 bl __fentry__ mov x30, x9 When -mfentry is used, the call is to '__fentry__' and not

[RFC PATCH 3/5] livepatch: ftrace: arm64: Add support for -mfentry on arm64

This patch depends on the compiler's mfentry feature for arm64 that proposed by this patchset. If the kernel is compiled with this feature, the entry of each function like: foo: mov x9, x30 bl __fentry__ mov x30, x9 When -mfentry is used, the call is to '__fentry__' and not