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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-11-15 21:54:32 -0500
committerPaul Mackerras <paulus@samba.org>2005-11-15 22:05:11 -0500
commit5d66da3d71e6aeca80ca08dbebd8a1cd72e6ee1f (patch)
tree1bdc54e617fc209925f33118f414ce0a4ebb62ac /arch/powerpc/kernel/vdso64/cacheflush.S
parentd3ed65832029dcaf5fe086670a2f2c25600b51e9 (diff)
[PATCH] powerpc: Make the vDSO functions set error code (#2)
The vDSO functions should have the same calling convention as a syscall. Unfortunately, they currently don't set the cr0.so bit which is used to indicate an error. This patch makes them clear this bit unconditionally since all functions currently succeed. The syscall fallback done by some of them will eventually override this if the syscall fails. This also changes the symbol version of all vdso exports to make sure glibc can differenciate between old and fixed calls for existing ones like __kernel_gettimeofday. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/vdso64/cacheflush.S')
-rw-r--r--arch/powerpc/kernel/vdso64/cacheflush.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/vdso64/cacheflush.S b/arch/powerpc/kernel/vdso64/cacheflush.S
index d4a0ad28d534..cb4ae0a5edd0 100644
--- a/arch/powerpc/kernel/vdso64/cacheflush.S
+++ b/arch/powerpc/kernel/vdso64/cacheflush.S
@@ -35,6 +35,7 @@ V_FUNCTION_BEGIN(__kernel_sync_dicache)
35 subf r8,r6,r4 /* compute length */ 35 subf r8,r6,r4 /* compute length */
36 add r8,r8,r5 /* ensure we get enough */ 36 add r8,r8,r5 /* ensure we get enough */
37 srwi. r8,r8,7 /* compute line count */ 37 srwi. r8,r8,7 /* compute line count */
38 crclr cr0*4+so
38 beqlr /* nothing to do? */ 39 beqlr /* nothing to do? */
39 mtctr r8 40 mtctr r8
40 mr r3,r6 41 mr r3,r6
@@ -58,6 +59,7 @@ V_FUNCTION_END(__kernel_sync_dicache)
58 */ 59 */
59V_FUNCTION_BEGIN(__kernel_sync_dicache_p5) 60V_FUNCTION_BEGIN(__kernel_sync_dicache_p5)
60 .cfi_startproc 61 .cfi_startproc
62 crclr cr0*4+so
61 sync 63 sync
62 isync 64 isync
63 li r3,0 65 li r3,0