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authorChristophe Leroy <christophe.leroy@csgroup.eu>2022-05-09 08:36:01 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2022-05-19 16:11:28 +0300
commit1acbf27e8a5843911d122ad0008e79ec5f7b6382 (patch)
tree5562f7c44f98597765c234b3766e79ee50ad951f /arch/powerpc/lib
parentae3a2a2188214adc355a5bdf6deb29120886c96f (diff)
downloadlinux-1acbf27e8a5843911d122ad0008e79ec5f7b6382.tar.xz
powerpc/code-patching: Inline is_offset_in_{cond}_branch_range()
Test in is_offset_in_branch_range() and is_offset_in_cond_branch_range() are simple tests that are worth inlining. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/a05be0ccb7373e6a9789a1988fcd0c810f5f9269.1652074503.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/lib')
-rw-r--r--arch/powerpc/lib/code-patching.c27
1 files changed, 0 insertions, 27 deletions
diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
index be670e1abafa..13a5a386d35b 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -214,33 +214,6 @@ int patch_branch(u32 *addr, unsigned long target, int flags)
return patch_instruction(addr, instr);
}
-bool is_offset_in_branch_range(long offset)
-{
- /*
- * Powerpc branch instruction is :
- *
- * 0 6 30 31
- * +---------+----------------+---+---+
- * | opcode | LI |AA |LK |
- * +---------+----------------+---+---+
- * Where AA = 0 and LK = 0
- *
- * LI is a signed 24 bits integer. The real branch offset is computed
- * by: imm32 = SignExtend(LI:'0b00', 32);
- *
- * So the maximum forward branch should be:
- * (0x007fffff << 2) = 0x01fffffc = 0x1fffffc
- * The maximum backward branch should be:
- * (0xff800000 << 2) = 0xfe000000 = -0x2000000
- */
- return (offset >= -0x2000000 && offset <= 0x1fffffc && !(offset & 0x3));
-}
-
-bool is_offset_in_cond_branch_range(long offset)
-{
- return offset >= -0x8000 && offset <= 0x7fff && !(offset & 0x3);
-}
-
/*
* Helper to check if a given instruction is a conditional branch
* Derived from the conditional checks in analyse_instr()