67b8e6af19
'And' the given page address with PAGE_MASK to help GCC. With the patch: 00000024 <__flush_dcache_icache>: 24: 54 63 00 26 rlwinm r3,r3,0,0,19 28: 39 40 00 40 li r10,64 2c: 7c 69 1b 78 mr r9,r3 30: 7d 49 03 a6 mtctr r10 34: 7c 00 48 6c dcbst 0,r9 38: 39 29 00 20 addi r9,r9,32 3c: 7c 00 48 6c dcbst 0,r9 40: 39 29 00 20 addi r9,r9,32 44: 42 00 ff f0 bdnz 34 <__flush_dcache_icache+0x10> 48: 7c 00 04 ac hwsync 4c: 39 20 00 40 li r9,64 50: 7d 29 03 a6 mtctr r9 54: 7c 00 1f ac icbi 0,r3 58: 38 63 00 20 addi r3,r3,32 5c: 7c 00 1f ac icbi 0,r3 60: 38 63 00 20 addi r3,r3,32 64: 42 00 ff f0 bdnz 54 <__flush_dcache_icache+0x30> 68: 7c 00 04 ac hwsync 6c: 4c 00 01 2c isync 70: 4e 80 00 20 blr Without the patch: 00000024 <__flush_dcache_icache>: 24: 54 6a 00 34 rlwinm r10,r3,0,0,26 28: 39 23 10 1f addi r9,r3,4127 2c: 7d 2a 48 50 subf r9,r10,r9 30: 55 29 d9 7f rlwinm. r9,r9,27,5,31 34: 41 82 00 94 beq c8 <__flush_dcache_icache+0xa4> 38: 71 28 00 01 andi. r8,r9,1 3c: 38 c9 ff ff addi r6,r9,-1 40: 7d 48 53 78 mr r8,r10 44: 7d 27 4b 78 mr r7,r9 48: 40 82 00 6c bne b4 <__flush_dcache_icache+0x90> 4c: 54 e7 f8 7e rlwinm r7,r7,31,1,31 50: 7c e9 03 a6 mtctr r7 54: 7c 00 40 6c dcbst 0,r8 58: 39 08 00 20 addi r8,r8,32 5c: 7c 00 40 6c dcbst 0,r8 60: 39 08 00 20 addi r8,r8,32 64: 42 00 ff f0 bdnz 54 <__flush_dcache_icache+0x30> 68: 7c 00 04 ac hwsync 6c: 71 28 00 01 andi. r8,r9,1 70: 39 09 ff ff addi r8,r9,-1 74: 40 82 00 2c bne a0 <__flush_dcache_icache+0x7c> 78: 55 29 f8 7e rlwinm r9,r9,31,1,31 7c: 7d 29 03 a6 mtctr r9 80: 7c 00 57 ac icbi 0,r10 84: 39 4a 00 20 addi r10,r10,32 88: 7c 00 57 ac icbi 0,r10 8c: 39 4a 00 20 addi r10,r10,32 90: 42 00 ff f0 bdnz 80 <__flush_dcache_icache+0x5c> 94: 7c 00 04 ac hwsync 98: 4c 00 01 2c isync 9c: 4e 80 00 20 blr a0: 7c 00 57 ac icbi 0,r10 a4: 2c 08 00 00 cmpwi r8,0 a8: 39 4a 00 20 addi r10,r10,32 ac: 40 82 ff cc bne 78 <__flush_dcache_icache+0x54> b0: 4b ff ff e4 b 94 <__flush_dcache_icache+0x70> b4: 7c 00 50 6c dcbst 0,r10 b8: 2c 06 00 00 cmpwi r6,0 bc: 39 0a 00 20 addi r8,r10,32 c0: 40 82 ff 8c bne 4c <__flush_dcache_icache+0x28> c4: 4b ff ff a4 b 68 <__flush_dcache_icache+0x44> c8: 7c 00 04 ac hwsync cc: 7c 00 04 ac hwsync d0: 4c 00 01 2c isync d4: 4e 80 00 20 blr Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/23030822ea5cd0a122948b10226abe56602dc027.1617895813.git.christophe.leroy@csgroup.eu
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.